Heat dissipation structure and neutron beam generator using same

Abstract

To provide a heat dissipation structure and a neutron beam generating device using the same.SOLUTION: A heat dissipation structure includes a housing. The housing has opposing upper and lower surfaces, and a fluid channel between the surfaces. The fluid channel is disposed to allow a fluid to pass through, and the fluid channel includes an inlet buffer tank, an outlet buffer tank, and a communication structure. The inlet buffer tank has a first inner wall surface and a second inner wall surface opposing the first inner wall surface. The outlet buffer tank has a second inner wall surface opposing the first inner wall surface. The second inner wall surface is closer to the inlet buffer tank than the first inner wall surface, and the second inner wall surface of the inlet buffer tank is closer to the outlet buffer tank than the first inner wall surface. The communication structure is disposed on the inlet buffer tank and the outlet buffer tank. The communication structure has a first bevel surface and a second bevel surface connected to the upper surface of the housing.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a heat dissipation structure and a neutron beam generating device using the heat dissipation structure. [Background technology]

[0002] Boron neutron capture therapy (BNCT) involves binding a boron-containing drug to tumor cells through the bloodstream and then irradiating the tumor tissue with a neutron beam, which causes the boron to absorb neutrons and generate lithium and helium ions, which precisely destroy the cancer cells without destroying other normal tissues.

[0003] Boron neutron capture therapy causes little damage to the patient and does not require surgery or anesthesia. Furthermore, when thermal neutrons with low penetration are used in boron neutron capture therapy to treat brain tumors, the patient's skull needs to be opened separately. In contrast, when hyperthermal neutrons are used in boron neutron capture therapy, the patient's skull does not need to be opened. In this regard, a method for generating a neutron beam may be to bombard a target with an ion beam using an accelerator-type neutron beam source generator. However, in the process of generating a neutron beam, the target bombarded by the ion beam may suffer unexpected damage due to poor heat dissipation.

[0004] In view of this, how to effectively solve the target heat dissipation problem in the process of generating neutron beams remains one of the goals that the industry is currently working on in research. Summary of the Invention

[0005] A technical aspect of the present disclosure is a heat dissipation structure.

[0006] According to some embodiments of the present disclosure, there is provided a heat dissipation structure including a housing, the housing having opposing upper and lower surfaces and a fluid passage installed between the upper and lower surfaces, the fluid passage being arranged to allow a fluid to pass through, the heat dissipation structure including: an inflow buffer tank having a first inner wall surface and a second inner wall surface opposite the first inner wall surface; an outflow buffer tank having the first inner wall surface and a second inner wall surface opposite the first inner wall surface, the second inner wall surface being closer to the inflow buffer tank than the first inner wall surface, and the second inner wall surface of the inflow buffer tank being closer to the outflow buffer tank than the first inner wall surface; and a communication structure installed on the inflow buffer tank and the outflow buffer tank, having a first inclined surface and a second inclined surface connected to the upper surface of the housing.

[0007] In some embodiments of the present disclosure, the first and second sloped surfaces of the communication structure gradually converge toward the lower surface of the housing.

[0008] In some embodiments of the present disclosure, a first inclined surface of the communication structure is connected to a first inner wall surface of the inlet buffer tank, and a second inclined surface of the communication structure is connected to a first inner wall surface of the outlet buffer tank.

[0009] In some embodiments of the present disclosure, the second inner wall surface of the inflow buffer tank is inclined relative to the upper surface of the housing, and the second inner wall surface of the outflow buffer tank is inclined relative to the upper surface of the housing.

[0010] In some embodiments of the present disclosure, the second inner wall surface of the inlet buffer tank and the second inner wall surface of the outlet buffer tank gradually contract toward the top surface of the housing.

[0011] In some embodiments of the present disclosure, when viewing the heat dissipation structure from a direction perpendicular to the top surface of the housing, the inlet buffer tank has a first arcuate contour, and the outlet buffer tank has a second arcuate contour different from the first arcuate contour.

[0012] In some embodiments of the present disclosure, when viewing the heat dissipation structure from a direction perpendicular to the top surface of the housing, the arc length of the second inner wall surface of the inflow buffer tank is greater than the arc length of the second inner wall surface of the outflow buffer tank.

[0013] In some embodiments of the present disclosure, the communication structure further has a bottom surface communicating with the second inner wall surface of the inflow buffer tank and the second inner wall surface of the outflow buffer tank.

[0014] Another technical aspect of the present disclosure is a neutron beam generator.

[0015] According to some embodiments of the present disclosure, there is provided a neutron beam generating device including the aforementioned heat dissipation structure, an ion beam tube having a passage, installed above the heat dissipation structure, directed toward an upper surface of a housing of the heat dissipation structure, and spaced from the upper surface of the housing of the heat dissipation structure, and an accelerator connected to the ion beam tube and arranged to fire an ion beam toward the upper surface of the housing of the heat dissipation structure through the passage.

[0016] In some embodiments of the present disclosure, the ion beam tube is perpendicular to the top surface of the housing of the heat dissipation structure.

[0017] In the above embodiment, the communication structure has a first inclined surface and a second inclined surface connected to the upper surface of the housing, so that the fluid in the fluid passage can be concentrated at a high flow rate to the center of the housing (i.e., corresponding to the center of the target), thereby improving the effect of dissipating heat from the target. Also, by this mechanism, the heat dissipation structure may be disposed in the neutron beam generator.

[0018] To make the above and other objects, features, advantages and embodiments of the present disclosure more comprehensible, reference is made to the accompanying drawings, in which: [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a cross-sectional view of a heat dissipation structure according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a top view of FIG. [Diagram 3] FIG. 3 is a partial schematic view of FIG. 2. [Figure 4] FIG. 2 is a cross-sectional view of a heat dissipation structure according to another embodiment of the present disclosure. [Diagram 5] 1 is a structural schematic diagram of a neutron beam generating device according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a structural schematic diagram of a neutron beam generating device according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In order to disclose and clearly explain several embodiments of the present disclosure in conjunction with the drawings, many practical details are described in the following description. However, it should be understood that these practical details are not intended to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary and should not be used to limit the present disclosure. In addition, in order to simplify the drawings, some conventional structures and elements are simply and diagrammatically shown in the drawings. In addition, for the convenience of readers, the size of each element in the drawings is not shown according to actual proportions.

[0021] As used in this disclosure, "about," "approximate," or "substantially" generally refers to within 20%, preferably within 10%, and more preferably within 5% of a given value or range. Numerical values ​​given herein are approximate, meaning that the meaning of the term "about," "approximate," or "substantially" can be inferred unless expressly stated.

[0022] FIG. 1 is a cross-sectional view of a heat dissipation structure 100 according to an embodiment of the present disclosure, and FIG. 2 is a top view of FIG. 1, where FIG. 1 shows a cross-sectional view along line AA in FIG. 2, and FIG. 2 is a cross-sectional projection of the heat dissipation structure 100 viewed from a direction perpendicular to the upper surface 111 of the housing 110. In FIG. 1 and FIG. 2, for convenience of explanation, a first direction D1 and a second direction D2 are shown, and the first direction D1 is different from the second direction D2. For example, the first direction D1 may be a horizontal direction in FIG. 2, the second direction D2 may be a vertical direction in FIG. 2, and the first direction D1 is perpendicular to the second direction D2.

[0023] The heat dissipation structure 100 includes a housing 110. The housing 110 has an upper surface 111 and a lower surface 113 facing each other, and a fluid passage 120 installed between the upper surface 111 and the lower surface 113, and the fluid passage 120 is arranged so that a fluid 130 passes through the fluid passage 120. The fluid passage 120 includes an inflow buffer tank 126, an outflow buffer tank 128, and a communication structure 129. The inflow buffer tank 126 has a first inner wall surface 126A and a second inner wall surface 126B facing the first inner wall surface 126A, and the second inner wall surface 126B of the inflow buffer tank 126 is closer to the outflow buffer tank 128 than the first inner wall surface 126A. The outflow buffer tank 128 has a first inner wall surface 128A and a second inner wall surface 128B facing the first inner wall surface 128A, and the second inner wall surface 128B of the outflow buffer tank 128 is closer to the inflow buffer tank 126 than the first inner wall surface 128A. The communication structure 129 is installed in the inflow buffer tank 126 and the outflow buffer tank 128, and the communication structure 129 has a first inclined surface 129A and a second inclined surface 129B connected to the upper surface 111 of the housing 110. With the above arrangement, the fluid 130 in the fluid passage 120 can be concentrated at a high flow rate in the center of the housing 110 (i.e., corresponding to the center of the target 140), thereby improving the effect of dissipating heat from the target 140.

[0024] The communication structure 129 may be regarded as an accommodation space located on the upper surface 111 of the housing 110 of the fluid passage 120. In other words, the communication structure 129 is located between the target 140 and the buffer tanks (the inflow buffer tank 126 and the outflow buffer tank 128). The fluid 130 flows from the inflow buffer tank 126 into the communication structure 129 and from the communication structure 129 to the outflow buffer tank 128. A first inclined surface 129A of the communication structure 129 connects the upper surface 111 of the housing 110 and a first inner wall surface 126A of the inflow buffer tank 126. In detail, the first inclined surface 129A of the communication structure 129 is inclined with respect to the upper surface 111 of the housing 110 and extends downward from the upper surface 111 of the housing 110. The first inner wall surface 126A of the inflow buffer tank 126 extends downward from the first inclined surface 129A of the communication structure 129. In some embodiments, in FIG. 1, the first inner wall surface 126A of the inflow buffer tank 126 is perpendicular to the upper surface 111 and / or the lower surface 113 of the housing 110. The second inclined surface 129B of the communication structure 129 connects the upper surface 111 of the housing 110 and the first inner wall surface 128A of the outflow buffer tank 128. In detail, the second inclined surface 129B of the communication structure 129 is inclined with respect to the upper surface 111 of the housing 110 and extends downward from the upper surface 111 of the housing 110. The first inner wall surface 128A of the outflow buffer tank 128 extends downward from the second inclined surface 129B of the communication structure 129. In some embodiments, in FIG. 1, the first inner wall surface 128A of the outflow buffer tank 128 is perpendicular to the upper surface 111 and / or the lower surface 113 of the housing 110.

[0025] In some embodiments, the first slope 129A and the second slope 129B of the communication structure 129 are symmetrically arranged. For example, the interior angle between the upper surface 111 and the first slope 129A is substantially equal to the interior angle between the upper surface 111 and the second slope 129B (or the slope of the first slope 129A is substantially equal to the slope of the second slope 129B), but the present disclosure is not limited thereto. In some embodiments, the first slope 129A and the second slope 129B of the communication structure 129 gradually contract from the upper surface 111 of the housing 110 toward the lower surface 113 of the housing 110. For example, a first interior angle between the first inclined surface 129A of the communication structure 129 and the first inner wall surface 126A of the inflow buffer tank 126 is greater than 180 degrees, and a second interior angle between the second inclined surface 129B of the communication structure 129 and the first inner wall surface 128A of the outflow buffer tank 128 is greater than 180 degrees. In some embodiments, the first interior angle may be substantially equal to the second interior angle, although the present disclosure is not limited thereto.

[0026] In some embodiments, the communication structure 129 further has a bottom surface 129C communicating with the second inner wall surface 126B of the inflow buffer tank 126 and the second inner wall surface 128B of the outflow buffer tank 128, and the bottom surface 129C of the communication structure 129 is inclined with respect to the second inner wall surface 126B of the inflow buffer tank 126 and / or the second inner wall surface 128B of the outflow buffer tank 128. In some embodiments, the communication structure 129 is located between the upper surface 111 of the housing 110 and the buffer tanks (the inflow buffer tank 126 and the outflow buffer tank 128), and the fluid 130 can contact the target 140 through the communication structure 129, thereby achieving the effect of cooling the target 140. In other words, the communication structure 129 includes a first portion located directly above the inlet buffer tank 126, a second portion located directly above the outlet buffer tank 128, and a third portion (i.e., a portion directly above the bottom surface 129C) connecting the first portion and the second portion. In some embodiments, as shown in FIG. 1 and FIG. 2, the fluid 130 in the fluid passage 120 is restricted by the first inclined surface 129A and the second inclined surface 129B of the communication structure 129, so that the fluid 130 is concentrated in the center of the housing 110 (e.g., the fluid 130 is restricted directly above the bottom surface 129C), thereby improving the effect of dissipating heat from the target 140. For example, the first inclined surface 129A has a point d1 on the upper surface 111 of the housing 110, and the second inclined surface 129B has a point d2 on the upper surface 111 of the housing 110. 1 may define a circle C3 in FIG 2. For example, the communication structure 129 may be regarded as a disk-shaped structure disposed above the inlet buffer tank 126 and the outlet buffer tank 128. When viewing the heat dissipation structure 100 from a direction perpendicular to the upper surface 111 of the housing 110, a cross-sectional projection of the fluid passage 120 along the first direction D1 between the points d1 and d2 (i.e., the communication structure 129) has a disk (or circular) profile, and is shown as a circle C3 in FIG 2.For example, when the heat dissipation structure 100 is viewed from a direction perpendicular to the upper surface 111 of the housing 110, the first inclined surface 129A of the communication structure 129, the bottom surface 129C of the communication structure 129 and its extending surface (i.e., the surface of the bottom surface 129C extending to the inlet buffer tank 126 and the outlet buffer tank 128), and the second inclined surface 129B of the communication structure 129 together form a disk outline, and the edge of the disk outline is shown as a circle C3 in FIG. 2. The points d1 and d2 may be regarded as end points (or edges) of the first inclined surface 129A and the second inclined surface 129B of the circle C3, respectively. Alternatively, the points d1 and d2 may be regarded as boundary points between the circle C3 and the line AA in FIG. 2. The first inclined surface 129A and the second inclined surface 129B can restrict the fluid 130 from flowing out from within the range of the circle C3. In some embodiments, the gradient of the first inclined surface 129A and the gradient of the second inclined surface 129B may vary depending on the liquid pressure. Specifically, the bottom surface 129C (or the extension surface of the bottom surface 129C) of the communication structure 129 and the extension surface of the first inclined surface 129A intersect at a (virtual) point d3. The position of the point d3 between the first inner wall surface 126A of the incoming buffer tank 126 and the bottom surface 129C (or the extension surface of the bottom surface 129C) of the communication structure 129 may be adjusted depending on the liquid pressure so as to determine the gradient of the first inclined surface 129A. For example, the point d3 may be located in the incoming buffer tank 126 (i.e., directly above the bottom surface 126C of the incoming buffer tank 126) or on the bottom surface 129C of the communication structure 129. Similarly, the bottom surface 129C (or the extension surface of the bottom surface 129C) of the communication structure 129 and the extension surface of the second inclined surface 129B intersect at a (virtual) point d4. The position of the point d4 between the first inner wall surface 128A of the outflow buffer tank 128 and the bottom surface 129C (or the extension surface of the bottom surface 129C) of the communication structure 129 may be adjusted according to the liquid pressure so as to determine the gradient of the second inclined surface 129B. For example, the point d4 may be located in the outflow buffer tank 128 (i.e., directly above the bottom surface 128C of the outflow buffer tank 128) or on the bottom surface 129C of the communication structure 129. The points d3 and d4 in FIG. 1 may define a circle C1 in FIG. 2.In detail, when the heat dissipation structure 100 is viewed from a direction perpendicular to the upper surface 111 of the housing 110, the cross-sectional projection of the fluid passage 120 between points d3 and d4 (i.e., the inlet buffer tank 126, the outlet buffer tank 128, and a part of the communication structure 129) along the first direction D1 has a disk (or circular) outline, and is shown as a circle C1 in Fig. 2. Points d3 and d4 may be regarded as boundary points between the circle C1 and the line A■A in Fig. 2, respectively.

[0027] In some embodiments, the target 140 is placed above the communication structure 129, so that the fluid 130 contacts the target 140 through the communication structure 129, thereby achieving the effect of cooling the target 140. In some embodiments, the target 140 completely covers the communication structure 129. In some embodiments, the first slope 129A of the communication structure 129 can restrict the fluid 130 to be concentrated in the center of the target 140, thereby achieving the effect of improving the cooling of the target 140 and the heat dissipation of the target 140.

[0028] 1 (i.e., a cross-sectional view taken along line AA in FIG. 2), the first inner wall surface 126A of the inflow buffer tank 126 is parallel to the first inner wall surface 128A of the outflow buffer tank 128. Or, in FIG. 2, the first inner wall surface 126A of the inflow buffer tank 126 and the first inner wall surface 128A of the outflow buffer tank 128 can form arcs of concentric circles.

[0029] In some embodiments, as shown in FIG. 1, the second inner wall surface 126B of the inflow buffer tank 126 is inclined with respect to the upper surface 111 and / or the lower surface 113 of the housing 110. Specifically, as shown in FIG. 1, the inflow buffer tank 126 further includes a bottom surface 126C connected to the second inner wall surface 126B, and the second inner wall surface 126B of the inflow buffer tank 126 is inclined with respect to the bottom surface 126C. This can reduce the liquid pressure and improve the heat dissipation efficiency. In some embodiments, as shown in FIG. 1, the second inner wall surface 128B of the outflow buffer tank 128 is inclined with respect to the upper surface 111 and / or the lower surface 113 of the housing 110. Specifically, as shown in FIG. 1, the outflow buffer tank 128 further includes a bottom surface 128C connected to the second inner wall surface 128B, and the second inner wall surface 128B of the outflow buffer tank 128 is inclined with respect to the bottom surface 128C. In this way, the liquid pressure can be reduced and the occurrence of turbulence or negative pressure can be avoided. In some embodiments, in FIG. 1 (i.e., a cross-sectional view taken along line AA in FIG. 2), the second inner wall surface 126B of the inflow buffer tank 126 is not parallel to the first inner wall surface 126A, and the second inner wall surface 128B of the outflow buffer tank 128 is not parallel to the first inner wall surface 128A. In some embodiments, as shown in FIG. 1, the bottom surface 126C of the inflow buffer tank 126 is flush with the bottom surface 128C of the outflow buffer tank 128. For example, in FIG. 1, the bottom surface 126C of the inflow buffer tank 126 and the bottom surface 128C of the outflow buffer tank 128 are located at substantially the same horizontal position. 1, the bottom surface 129C of the communication structure 129 is located above the bottom surface 126C of the inflow buffer tank 126, and the bottom surface 129C of the communication structure 129 is located above the bottom surface 128C of the outflow buffer tank 128. In some embodiments, as shown in FIG. 1, the vertical projection of the bottom surface 129C of the communication structure 129 on the top surface 111 of the housing 110 does not overlap with the vertical projection of the bottom surface 126C of the inflow buffer tank 126 (or the bottom surface 128C of the outflow buffer tank 128) on the top surface 111 of the housing 110.

[0030] In some embodiments, the second inner wall surface 126B of the inflow buffer tank 126 and the second inner wall surface 128B of the outflow buffer tank 128 gradually contract toward the upper surface 111 of the housing 110. In this way, the fluid 130 in the fluid passage 120 can be concentrated in the center of the housing 110, thereby improving the heat dissipation efficiency. In some embodiments, the distance along the first direction D1 between the first inner wall surface 126A and the second inner wall surface 126B of the inflow buffer tank 126 increases from the lower surface 113 of the housing 110 toward the upper surface 111 of the housing 110. The distance along the first direction D1 between the first inner wall surface 128A and the second inner wall surface 128B of the outflow buffer tank 128 increases from the lower surface 113 of the housing 110 toward the upper surface 111 of the housing 110. In some embodiments, the interior angle formed by the second inner wall surface 126B and the bottom surface 126C of the inflow buffer tank 126 is greater than 90 degrees, and the interior angle formed by the second inner wall surface 128B and the bottom surface 128C of the outflow buffer tank 128 is greater than 90 degrees. In some embodiments, the slope of the second inner wall surface 126B of the inflow buffer tank 126 (e.g., the interior angle between the second inner wall surface 126B and the bottom surface 126C) is different from the slope of the second inner wall surface 128B of the outflow buffer tank 128 (e.g., the interior angle between the second inner wall surface 128B and the bottom surface 128C). For example, the slope of the second inner wall surface 126B of the inflow buffer tank 126 is greater than the slope of the second inner wall surface 128B of the outflow buffer tank 128.

[0031] In some embodiments, the material of the housing 110 may be a metal such as aluminum. The housing 110 may be integrally molded or formed by assembly. The upper surface 111 of the housing 110 may be considered as the highest surface of the housing 110, and the lower surface 113 of the housing 110 may be considered as the lowest surface of the housing 110. The housing 110 may be arranged to carry a target 140, which may be a plate-shaped target. The target 140 is placed on the upper surface 111 of the housing 110. The target 140 covers the entire communication structure 129. Specifically, the target 140 completely covers the first inclined surface 129A, the bottom surface 129C, and the second inclined surface 129B of the communication structure 129.

[0032] The fluid passage 120 further includes an inlet passage 122 and an outlet passage 124. The inlet passage 122 and the outlet passage 124 are located at opposite ends of the housing 110, respectively. The inlet passage 122 and the outlet passage 124 of the fluid passage 120 can extend along the same direction (for example, the first direction D1). A first inner wall surface 126A of the inlet buffer tank 126 is connected to the inlet passage 122, and a second inner wall surface 126B of the inlet buffer tank 126 is closer to the outlet passage 124 than the first inner wall surface 126A. A first inner wall surface 128A of the outlet buffer tank 128 is connected to the outlet passage 124, and a second inner wall surface 128B of the outlet buffer tank 128 is closer to the inlet passage 122 than the first inner wall surface 128A.

[0033] In some embodiments, the heat dissipation structure 100 further includes an inlet pipe 150 and an outlet pipe 160 connected to opposite ends of the housing 110. The inlet pipe 150 is connected to the inlet passage 122 of the housing 110, and the outlet pipe 160 is connected to the outlet passage 124 of the housing 110. In some embodiments, the heat dissipation structure 100 further includes a pressurizing device (not shown), which is arranged to pump the fluid 130 from the inlet pipe 150 to the inlet passage 122 in the housing 110, so that the fluid 130 can flow through the inlet buffer tank 126 and the communication structure 129 to contact the target 140, as shown by arrow A1. Then, the fluid 130 can further leave the housing 110 through the outlet buffer tank 128 and the outlet passage 124 to the outlet pipe 160, as shown by arrow A2.

[0034] 3 is a partial schematic diagram of FIG. 2. For convenience of explanation, FIG. 3 omits the inlet pipe 150, the inlet passage 122, the outlet passage 124, and the outlet pipe 160 shown in FIG. 2. As shown in FIG. 3, the housing 110, the target 140, the circle C1, the circle C3, the circle having the first inner wall surface 126A of the inlet buffer tank 126 as its circumference, and the circle having the first inner wall surface 128A of the outlet buffer tank 128 as its circumference are concentric. In some embodiments, the housing 110 and the target 140 have a disk structure, and the housing 110 and the target 140 share a center 110C. The first line L1 is an imaginary line passing through the center 110C and extending along the first direction D1, and the second line L2 is an imaginary line passing through the center 110C and extending along the second direction D2, and the first line L1 is perpendicular to the second line L2.

[0035] Please refer to FIG. 1 to FIG. 3. When the heat dissipation structure 100 is viewed from a direction perpendicular to the upper surface 111 of the housing 110 (i.e., the top view of the heat dissipation structure 100 shown in FIG. 2 and FIG. 3), the inflow buffer tank 126 has a first arcuate contour, and the outflow buffer tank 128 has a second arcuate contour different from the first arcuate contour. In this way, the fluid 130 in the fluid passage 120 can be concentrated at a high flow rate to the center of the housing 110 (i.e., corresponding to the center of the target 140), thereby improving the effect of dissipating heat from the target 140. In some embodiments, the arc length of the first inner wall surface 126A of the inflow buffer tank 126 is greater than the arc length of the first inner wall surface 128A of the outflow buffer tank 128. The arc length of the second inner wall surface 126B of the inflow buffer tank 126 is greater than the arc length of the second inner wall surface 128B of the outflow buffer tank 128. In other words, the incoming liquid buffer tank 126 is spaced apart from the center 110C by a central angle a I The outflow buffer tank 128 is formed at a central angle a O The liquid inlet buffer tank 126 has a central angle a I is the central angle a of the outflow buffer tank 128 O In this way, when the fluid 130 flows through the communication structure 129 from the inflow buffer tank 126 to the outflow buffer tank 128, the fluid 130 is concentrated in the center of the housing 110 (for example, within the range of the circle C2), and the flow rate changes. Specifically, the fluid 130 has a high flow rate in the center of the housing 110 (for example, within the range of the circle C2), thereby improving the effect of dissipating heat from the target 140. In some embodiments, the central angle a of the inflow buffer tank 126 is I and the central angle a of the outflow buffer tank 128 O may vary depending on the full width at half maximum of the incident ion beam (e.g., ion beam 230 in FIG. 5) and may be adjusted. For example, the central angle a of the input buffer tank 126 I and the central angle a of the outflow buffer tank 128 O are in the range of about 40 degrees and about 120 degrees, respectively.

[0036] In some embodiments, as shown in FIG. 3, the width W of the inlet buffer tank 126 along a first line L1 between the first inner wall surface 126A and the second inner wall surface 126B is I is the width W along the first line L1 between the first inner wall surface 128A and the second inner wall surface 128B of the outflow buffer tank 128. O More specifically, the width W along the first line L1 between the first inner wall surface 126A and the second inner wall surface 126B of the incoming liquid buffer tank 126 is different from I is the width W along the first line L1 between the first inner wall surface 128A and the second inner wall surface 128B of the outflow buffer tank 128. O The width W of the inlet buffer tank 126 is smaller than I and the width W of the outflow buffer tank 128 O may be adjusted according to the design liquid pressure of the inlet pipe 150. It should be understood that the "width" here means the vertical distance between two inner wall surfaces of the inlet buffer tank 126 / outlet buffer tank 128 (for example, between the first inner wall surface 126A and the second inner wall surface 126B, or between the first inner wall surface 128A and the second inner wall surface 128B). Taking the inlet buffer tank 126 as an example, there is a point P1 on the first inner wall surface 126A of the inlet buffer tank 126, and there is a point P2 on the second inner wall surface 126B that is closest to the point P1. The distance between the vertical normal N1 of the point P1 and the vertical normal N2 of the point P2 is the width W of the first inner wall surface 126A and the second inner wall surface 126B. I (i.e., perpendicular distance).

[0037] In some embodiments, the shortest distance between the first inner wall surface 126A of the inlet buffer tank 126 and the center 110C of the housing 110 (or the radius of a circle having the first inner wall surface 126A as a circumference) R IA is the shortest distance R between the first inner wall surface 128A of the outflow buffer tank 128 and the center 110C of the housing 110 (or the radius of a circle having the first inner wall surface 128A as its circumference). OA For example, the shortest distance R between the first inner wall surface 126A of the incoming liquid buffer tank 126 and the center 110C of the housing 110 is IA is the shortest distance R between the first inner wall surface 128A of the outflow buffer tank 128 and the center 110C of the housing 110.OA Alternatively, the shortest distance R between the first inner wall surface 126A of the inlet buffer tank 126 and the center 110C of the housing 110 is larger than IA is the shortest distance R between the first inner wall surface 128A of the outflow buffer tank 128 and the center 110C of the housing 110. OA The following will explain the present disclosure, but the present disclosure is not limited thereto. In addition, the shortest distance between the second inner wall surface 126B of the inlet buffer tank 126 and the center 110C of the housing 110 (or the radius of a circle having the second inner wall surface 126B as its circumference) R IB is the shortest distance R between the second inner wall surface 128B of the outflow buffer tank 128 and the center 110C of the housing 110 (or the radius of a circle having the second inner wall surface 128B as its circumference). OB For example, the shortest distance R between the second inner wall surface 126B of the incoming liquid buffer tank 126 and the center 110C of the housing 110 is IB is the shortest distance R between the second inner wall surface 128B of the outflow buffer tank 128 and the center 110C of the housing 110. OB Alternatively, the shortest distance R between the second inner wall surface 126B of the inlet buffer tank 126 and the center 110C of the housing 110 is larger than IB is the shortest distance R between the second inner wall surface 128B of the outflow buffer tank 128 and the center 110C of the housing 110. OB The following is an example, but the present disclosure is not limited thereto. In some embodiments, the inlet buffer tank 126 has two ends 1261 and a central end 1262 between the two ends 1261, the central end 1262 of the inlet buffer tank 126 is connected to the inlet passage 122, and the central end 1262 is closer to the inlet passage 122 than the two ends 1261. Similarly, the outflow buffer tank 128 has two ends 1281 and a central end 1282 between the two ends 1281, the central end 1282 of the outflow buffer tank 128 is connected to the outflow passage 124, and the central end 1282 is closer to the outflow passage 124 than the two ends 1281. The shortest distance R between one of the two ends 1261 of the inlet buffer tank 126 and the center 110C of the housing 110 is IB is the shortest distance R between one of the two ends 1281 of the outflow buffer tank 128 and the center 110C of the housing 110. OBIn some embodiments, the shortest distance R between the first inner wall surface 126A of the inlet buffer tank 126 and the center 110C of the housing 110 is larger than IA and the shortest distance R between the first inner wall surface 128A of the outflow buffer tank 128 and the center 110C of the housing 110. OA The shortest distance R between the second inner wall surface 126B of the input buffer tank 126 and the center 110C of the housing 110 varies depending on the full width at half maximum of the incident ion beam (for example, the ion beam 230 in FIG. 5) and may be adjusted. IB and the shortest distance R between the second inner wall surface 128B of the outflow buffer tank 128 and the center 110C of the housing 110. OB depends on the full width at half maximum of the incident ion beam (eg, ion beam 230 in FIG. 5) and may be adjusted.

[0038] In some embodiments, the arrangement of the inlet buffer tank 126, the outlet buffer tank 128, and the communication structure 129 of the present disclosure allows the fluid 130 in the fluid passage 120 to have a high flow rate in the center of the corresponding housing 110 (e.g., within the range of circle C2), and the fluid 130 to provide a high heat dissipation effect to the target 140. That is, the heat dissipation effect provided by the fluid 130 to the target 140 decreases from the center to both sides in the second direction D2 from the center of the housing 110 (e.g., within the range of circle C2). By this mechanism, the heat dissipation structure 100 may be arranged to dissipate heat from the target 140 in which the distribution of the heat source "decreases from the center to both sides", and the expression "decreases from the center to both sides" may be, for example, a Gaussian distribution, a normal distribution, or a bell-shaped curve.

[0039] In some embodiments, as shown in Fig. 1, the heat dissipation structure 100 further includes a seal gasket 172. The housing 110 may have a groove 170 on the upper surface 111, and the seal gasket 172 may be installed in the groove 170. The seal gasket 172 can provide airtightness and waterproof effects. It should be understood that, for the sake of simplicity, the groove 170 and the seal gasket 172 in Fig. 1 are not shown in Figs. 2 and 3.

[0040] Since the heat dissipation structure 100 may be arranged to dissipate heat from a target 140 in which the distribution of heat sources decreases from the center to both sides, the heat dissipation structure 100 may be arranged to be applied to an apparatus in which the target 140 has such a distribution of heat sources during operation, such as a neutron beam generating apparatus.

[0041] 4 is a schematic diagram of a heat dissipation structure 100a according to another embodiment of the present disclosure. The heat dissipation structure 100a in FIG. 4 is almost the same as the heat dissipation structure 100 in FIG. 1, and the difference between them is the arrangement of the inlet pipe 150a and the outlet pipe 160a of the heat dissipation structure 100a. The inlet pipe 150a and the outlet pipe 160a of the heat dissipation structure 100a are located on the lower surface 113 of the housing 110. The inlet pipe 150a is connected to the inlet buffer tank 126 of the fluid passage 120a, and the outlet pipe 160a is connected to the outlet buffer tank 128 of the fluid passage 120a. In some embodiments, the heat dissipation structure 100 may further include a pressurizing device (not shown), which is arranged to pump the fluid 130 from the inlet pipe 150 to the inlet buffer tank 126 of the fluid passage 120a, and the fluid 130 can flow through the inlet buffer tank 126 and the communication structure 129 to contact the target 140, as shown by the arrow A3. Then, the fluid 130 can further leave the housing 110 to the outlet pipe 160a via the outlet buffer tank 128, as shown by the arrow A4. The installation direction of the inlet pipe 150a and the outlet pipe 160a (i.e., the direction of the arrows A3 and A4) is perpendicular to the lower surface 113 of the housing 110.

[0042] In some embodiments, the fluid passage 120a further includes an inlet passage and an outlet passage disposed on the lower surface 113 of the housing 110, the inlet buffer tank 126 communicates with the inlet passage, and the outlet buffer tank 128 is connected to the outlet passage. That is, in the direction of the arrow A3, the inlet passage is located between the inlet pipe 150a and the inlet buffer tank 126, and in the direction of the arrow A4, the outlet passage is located between the outlet pipe 160a and the outlet buffer tank 128. The bottom surface 126C of the inlet buffer tank 126 may have an opening, so that the fluid 130 flows in from the inlet passage through the opening. Similarly, the bottom surface 128C of the outlet buffer tank 128 may have an opening, so that the fluid 130 is discharged to the outlet passage through the opening.

[0043] 5 is a structural schematic diagram of a neutron beam generator 200 according to an embodiment of the present disclosure. In order not to overly complicate the drawing, the proportional relationship between each layer depicted in FIG. 5 is not necessarily the same as the actual proportional relationship, and the depicted structure is for the purpose of assisting the explanation, and is not for the purpose of limiting the relative positional relationship of each layer in the structure; in other embodiments, some layers may be omitted or other layers may be added.

[0044] Please refer to FIG. 5. The neutron beam generating device 200 includes a heat dissipation structure 100, an ion beam tube 210, and an accelerator 220. The ion beam tube 210 is installed above the heat dissipation structure 100 and faces the upper surface 111 of the housing 110 of the heat dissipation structure 100, and there is a gap G between the ion beam tube 210 and the upper surface 111 of the housing 110 of the heat dissipation structure 100. In some embodiments, the gap G between the ion beam tube 210 and the heat dissipation structure 100 is arranged to accommodate the target 140. The ion beam tube 210 and the upper surface 111 of the housing 110 of the heat dissipation structure 100 are respectively arranged to abut on both opposite sides of the target 140. The material of the target 140 may include beryllium (Be). The ion beam tube 210 may have a passage 212, and the accelerator 220 may be connected to the ion beam tube 210, with the accelerator 220 disposed to project the ion beam 230 toward the top surface 111 of the housing 110 of the heat dissipation structure 100 through the passage 212. That is, the accelerator 220 disposed to project the ion beam 230 toward the target 140 through the passage 212. In some embodiments, the ion beam 230 generated from the accelerator 220 may pass through the passage 212, so that the ion beam 230 may collide with the target 140, thereby exciting a neutron beam used in boron neutron capture therapy (BNCT).

[0045] In some embodiments, the extension direction of the ion beam tube 210 is perpendicular to the upper surface 111 of the housing 110 of the heat dissipation structure 100. In other words, the extension direction of the ion beam tube 210 is perpendicular to the target 140, and the ion beam tube 210 is abutted against both sides of the heat dissipation structure 100. In some embodiments, the length of the vertical projection of the inlet buffer tank 126 along the first direction D1 on the upper surface 111 of the housing 110 is smaller than the length of the vertical projection of the outlet buffer tank 128 along the first direction D1 on the upper surface 111 of the housing 110. The length of the vertical projection of the inlet buffer tank 126 along the first direction D1 on the target 140 of the outlet buffer tank 128 is smaller than the length of the vertical projection of the inlet buffer tank 126 along the first direction D1 on the target 140 of the outlet buffer tank 128. In some embodiments, the extension direction of the inlet tube 150 and / or the outlet tube 160 is perpendicular to the extension direction of the ion beam tube 210. In some embodiments, the width of the passage 212 of the ion beam tube 210 is approximately flush with the communication structure 129. Specifically, both sides of the passage 212 of the ion beam tube 210 are flush with the first slope 129A and the second slope 129B of the communication structure 129, respectively.

[0046] In some embodiments, when the accelerator 220 launches the ion beam 230 toward the target 140 through the passage 212, the density distribution of the launched ion beam 230 is a Gaussian distribution, so that the distribution of the heat source of the target 140 impacted by the ion beam 230 is also a Gaussian distribution. That is, the target 140 may be regarded as a heat source having a Gaussian distribution, and the heat dissipation structure 100 may be arranged to dissipate heat from such a heat source, so that the heat dissipation structure 100 can prevent unexpected damage from occurring during the operation of the neutron beam generator 200, for example, the target 140 from exploding due to excessive thermal stress. In some embodiments, the accelerator 220 is a cyclotron.

[0047] 6 is a schematic diagram of a neutron beam generator 200a according to another embodiment of the present disclosure. The neutron beam generator 200a of FIG. 6 is almost the same as the neutron beam generator 200 of FIG. 5, and the difference between them is the arrangement of the heat dissipation structure 100a. The inlet pipe 150a and the outlet pipe 160a of the heat dissipation structure 100a are located on the lower surface 113 of the housing 110. The extension direction of the inlet pipe 150a and / or the outlet pipe 160a is parallel to the extension direction of the ion beam tube 210. Other descriptions regarding the heat dissipation structure 100a may refer to the embodiment of FIG. 4, and the description will be omitted here for brevity.

[0048] As described above, since the communication structure of the present disclosure has the first inclined surface and the second inclined surface connected to the upper surface of the housing, the fluid in the fluid passage can be concentrated at a high flow rate to the center of the housing (i.e., corresponding to the center of the target), thereby improving the effect of dissipating heat from the target. Also, by this mechanism, the heat dissipation structure may be disposed in a neutron beam generator.

[0049] The present invention has been disclosed above based on the embodiments, but the embodiments do not limit the present invention, and a person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on what is defined in the appended claims. [Explanation of symbols]

[0050] 100, 100a Heat dissipation structure 110 Housing 110C center 111 Top surface 113 Bottom surface 120 Fluid passage 122 Inlet passage 124 bleeding passage 126 Liquid input buffer tank 126A, 128A First inner wall surface 126B, 128B Second inner wall surface 1261, 1281 terminal 1262, 1282 center edge 128 Outflow buffer tank 126C, 128C, 129C bottom 129 Communication structure 129A First Slope 129B Second Slope 130 Fluid 140 Target 150, 150a liquid inlet pipe 160, 160a Outlet pipe 170 Groove 172 Sealing gasket 200, 200a Neutron beam generator 210 Ion beam tube Aisle 212 230 Ion Beam A■A line A1, A2, A3, A4 arrows a I , a O center angle C1, C2, C3 Yen D1 First direction D2 Second direction G interval N1, N2 normals L1 First Line L2 Second Line d1, d2, d3, d4, P1, P2 points R IA , R IB , R OA , R OB distance W I , W O width

Claims

1. A heat dissipation structure including a housing having opposing upper and lower surfaces and a fluid passageway disposed between the upper and lower surfaces, The fluid passage is disposed to allow a fluid to pass therethrough, and the fluid passage comprises: an inlet buffer tank having a first inner wall surface and a second inner wall surface opposed to the first inner wall surface; an outflow buffer tank having a first inner wall surface and a second inner wall surface facing the first inner wall surface, wherein the second inner wall surface of the outflow buffer tank is closer to the inflow buffer tank than the first inner wall surface, and the second inner wall surface of the inflow buffer tank is closer to the outflow buffer tank than the first inner wall surface; a communication structure provided in the inlet buffer tank and the outlet buffer tank, the communication structure having a first inclined surface and a second inclined surface connected to the upper surface of the housing; A heat dissipation structure including a heat dissipation device.

2. a first interior angle between the first inclined surface of the communication structure and the first inner wall surface of the liquid-inflow buffer tank is greater than 180 degrees; The heat dissipation structure according to claim 1 , wherein a second interior angle between the second inclined surface of the communication structure and the second inner wall surface of the outflow buffer tank is greater than 180 degrees.

3. 2. The heat dissipation structure according to claim 1, wherein the first inclined surface of the communication structure is connected to the first inner wall surface of the inlet buffer tank, and the second inclined surface of the communication structure is connected to the first inner wall surface of the outlet buffer tank.

4. The heat dissipation structure according to claim 1 , wherein the second inner wall surface of the inlet buffer tank is inclined relative to the upper surface of the housing, and the second inner wall surface of the outlet buffer tank is inclined relative to the upper surface of the housing.

5. a first interior angle between the second inner wall surface of the liquid input buffer tank and a bottom surface of the liquid input buffer tank is greater than 90 degrees; The heat dissipation structure according to claim 1 , wherein a second interior angle between the second inner wall surface of the outflow buffer tank and a bottom surface of the outflow buffer tank is greater than 90 degrees.

6. The heat dissipation structure of claim 1, wherein when the heat dissipation structure is viewed from a direction perpendicular to the top surface of the housing, the inlet buffer tank has a first arcuate contour, and the outlet buffer tank has a second arcuate contour different from the first arcuate contour.

7. A heat dissipation structure including a housing having opposing upper and lower surfaces and a fluid passageway disposed between the upper and lower surfaces, The fluid passage is disposed to allow a fluid to pass therethrough, and the fluid passage comprises: an inlet buffer tank having a first inner wall surface and a second inner wall surface opposed to the first inner wall surface; an outflow buffer tank having a first inner wall surface and a second inner wall surface opposing the first inner wall surface, wherein the second inner wall surface of the outflow buffer tank is closer to the inflow buffer tank than the first inner wall surface, and the second inner wall surface of the inflow buffer tank is closer to the outflow buffer tank than the first inner wall surface, and when the heat dissipation structure is viewed from a direction perpendicular to the top surface of the housing, an arc length of the second inner wall surface of the inflow buffer tank is larger than an arc length of the second inner wall surface of the outflow buffer tank; a communication structure provided in the inlet buffer tank and the outlet buffer tank, the communication structure having a first inclined surface and a second inclined surface connected to the upper surface of the housing; A heat dissipation structure including a heat dissipation device.

8. The heat dissipation structure according to claim 1 , wherein the communication structure further includes a bottom surface that connects the second inner wall surface of the inlet buffer tank and the second inner wall surface of the outlet buffer tank.

9. A heat dissipation structure according to any one of claims 1 to 8, an ion beam tube having a passage, the ion beam tube being disposed above the heat dissipation structure and facing the upper surface of the housing of the heat dissipation structure, with a gap between the ion beam tube and the upper surface of the housing of the heat dissipation structure; an accelerator connected to the ion beam tube and positioned to project an ion beam through the passage toward the top surface of the housing of the heat dissipation structure; A neutron beam generator comprising:

10. The neutron beam generator of claim 9 , wherein the ion beam tube is perpendicular to the top surface of the housing of the heat dissipation structure.

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