Beam detection device and electron accelerator

Abstract

The utility model discloses a beam detection device and an electron accelerator, the electron accelerator comprises an accelerating tube, a magnetic lens and a tungsten target, the magnetic lens is arranged at an electron beam outlet of the accelerating tube, and the beam detection device is arranged between the magnetic lens and the tungsten target. The beam detection device comprises a fixing body, an electronic receiving piece, a conductor piece, an insulating piece, a detection circuit and a control circuit, a through hole is formed in the fixing body, the electronic receiving piece is fixed to the periphery of the through hole through the insulating piece and connected with the conductor piece, a plurality of connecting holes are formed in the side face of the fixing body, and the detection circuit is connected with the control circuit. The conductor piece penetrates through the connecting hole to be connected with the detection circuit, the detection circuit transmits a detection signal to the control circuit, and the control circuit transmits a control signal to the magnetic lens. According to the utility model, the electron accelerator can be improved, so that the electron accelerator has the function of detecting the offset of the electron beam, the current of the magnetic lens can be adjusted, and the efficiency of the electron accelerator is improved.

Description

Technical Field

[0001] The utility model relates to a beam detection device and an electron accelerator. Background Art

[0002] An electron accelerator is a device used to accelerate charged particles. Among them, a high-frequency high-voltage accelerator accelerates charged particles to high energy through the action of a high-frequency electric field and a high-voltage electric field. They are widely used in research fields, including particle physics, nuclear physics, and materials science. Electron accelerators can work in different ways, including linear accelerators and circular accelerators. By continuously accelerating particles, electron accelerators can generate high-energy particle beams for studying high-energy physical phenomena or performing medical radiotherapy.

[0003] In an electron accelerator, the focusing and confinement of the electron beam are crucial for ensuring the stability and concentration of the electron beam current. The traditional scheme cannot detect the focusing situation of the electron beam in real time and cannot adjust the current of the magnetic lens in real time, resulting in low working efficiency of the electron accelerator. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects that in the prior art, the electron accelerator cannot detect the offset of the electron beam in real time, cannot adjust the current of the magnetic lens in real time, and has low working efficiency of the electron accelerator, and to provide a beam detection device and an electron accelerator with the function of detecting the offset of the electron beam, which can realize precise adjustment of the current of the magnetic lens and improve the efficiency of the electron accelerator.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A beam detection device for an electron accelerator, characterized in that the electron accelerator includes an accelerating tube, a magnetic lens, and a tungsten target. The magnetic lens is arranged at the electron beam outlet of the accelerating tube. The beam detection device is arranged between the magnetic lens and the tungsten target. The beam detection device includes a fixed main body, a plurality of electron receiving sheets, a conductor member, an insulating member, a detection circuit, and a control circuit.

[0007] A through hole is provided on the fixed main body. The electron receiving sheets are fixed around the through hole through the insulating member. The electron receiving sheets are connected to the conductor member. A plurality of connection holes are provided on the side surface of the fixed main body. The conductor member passes through the connection holes and is connected to the detection circuit. The detection circuit transmits a detection signal to the control circuit, and the control circuit transmits a control signal to the magnetic lens.

[0008] Preferably, the number of both the electron receiving sheets and the connection holes is 4, and the electron receiving sheets are arc-shaped with a size matching the through hole.

[0009] Preferably, the conductor member includes a copper electrode rod and a screw. The copper electrode rod is installed in the connection hole, and one end is fixed to an electron receiving piece by the screw.

[0010] Preferably, the insulating member includes a first ceramic ring and a second ceramic ring. Both the first ceramic ring and the second ceramic ring include a sleeve. The inner surface of the sleeve is radially positioned with respect to the outer surface of the copper electrode rod, and the outer surface of the sleeve is radially positioned with respect to the inner surface of the connection hole. A first convex ring is provided at the inner end of the sleeve of the first ceramic ring, and the outer diameter of the first convex ring is greater than the inner diameter of the connection hole. A second convex ring is provided at the outer end of the sleeve of the second ceramic ring, and the outer diameter of the second convex ring is greater than the inner diameter of the connection hole.

[0011] Preferably, a counterbore is provided at the outer end of the connection hole, the sleeve of the second ceramic ring is disposed in the counterbore, a thread is provided at the outer end of the copper electrode rod, and the copper electrode rod is locked in the connection hole by screwing with a nut.

[0012] Preferably, an installation plane is provided at the inner end of the copper electrode rod, the installation plane is perpendicular to the end face of the copper electrode rod, and the electron receiving piece is installed on the installation plane by a screw.

[0013] Preferably, the detection circuit includes a number of shunt microammeters. Each electron receiving piece is correspondingly connected to the input end of a microammeter through a conductor member, and the output end of the microammeter is connected to the control circuit.

[0014] Preferably, the microammeter is a digital microammeter, and the power supply pin of the digital microammeter is connected to a power supply.

[0015] Preferably, the tungsten target is disposed between the beam current detection device and the scanning box.

[0016] The present invention also provides an electron accelerator, characterized in that the electron accelerator includes the beam current detection device as described above.

[0017] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0018] The positive and progressive effects of the present invention are as follows:

[0019] When the accelerated electron beam passes through the acceleration tube, when the diameter of the electron beam is too large and the electron beam is deflected, electrons will bombard the electron receiving piece. After the receiving piece receives the current signal, the signal is transmitted to the control circuit through the copper electrode. The control circuit can adjust the current of the magnetic lens. By adjusting the current magnitude, the magnetic field strength can be controlled to further focus the electron beam.

[0020] The utility model can improve an electron accelerator, endowing it with the function of detecting the offset of an electron beam. Furthermore, it can adjust the current of a magnetic lens, thereby improving the efficiency of the electron accelerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic structural diagram of a beam current detection device according to Embodiment 1 of the utility model.

[0022] Figure 2 FIG. is a schematic structural diagram of an electron accelerator according to Embodiment 1 of the utility model.

[0023] Figure 3 FIG. is a schematic cross-sectional structural diagram of a beam current detection device according to Embodiment 1 of the utility model.

[0024] Figure 4 FIG. is another schematic cross-sectional structural diagram of a beam current detection device according to Embodiment 1 of the utility model.

[0025] Figure 5 FIG. is a schematic structural diagram of a first ceramic ring according to Embodiment 1 of the utility model.

[0026] Figure 6 FIG. is a schematic structural diagram of a beam current detection device according to Embodiment 1 of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further illustrates the utility model by way of embodiments, but the utility model is not limited to the scope of the described embodiments.

[0028] Embodiment 1

[0029] In this embodiment, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In this embodiment, the inner end refers to the end close to the center of the part, and the outer end refers to the end close to the edge of the part.

[0031] Refer to Figures 1 to 6 , this embodiment provides an electron accelerator, which includes an accelerating tube 11, a magnetic lens 12, a beam current detection device 13, and a tungsten target 14.

[0032] The magnetic lens 12 is provided on one side of the electron beam outlet of the acceleration tube 11, and the beam current detection device 13 is provided between the magnetic lens 12 and the tungsten target 14.

[0033] The beam current detection device 13 includes a fixed main body 131, a plurality of electron receiving sheets 132, a conductor member 133, an insulating member 134, a detection circuit 135, and a control circuit 136.

[0034] Specifically, the fixed main body is provided between the magnetic lens 12 and the tungsten target 14.

[0035] A through hole 1311 is provided on the fixed main body 131.

[0036] The electron receiving sheets 132 are fixed around the through hole 1311 through the insulating member 134. The insulating member is used to isolate the connection between the conductor member and the fixed main body.

[0037] The electron receiving sheets are connected to the conductor member 133.

[0038] A plurality of connection holes are provided on the side surface of the fixed main body.

[0039] The conductor member passes through the connection holes and is connected to the detection circuit.

[0040] The detection circuit transmits a detection signal to the control circuit, and the control circuit transmits a control signal to the magnetic lens.

[0041] The number of both the electron receiving sheets and the connection holes is 4, and the electron receiving sheets are arc-shaped with a size matching the through hole.

[0042] The conductor member 133 includes an electrode copper rod 1331 and a screw 1332. The electrode copper rod is installed in the connection hole and one end is fixed to an electron receiving sheet through the screw.

[0043] The insulating member 134 includes a first ceramic ring 1341 and a second ceramic ring 1342.

[0044] Both the first ceramic ring and the second ceramic ring include a sleeve 1343.

[0045] The inner surface of the sleeve is radially positioned with the outer surface of the electrode copper rod.

[0046] The outer surface of the sleeve is radially positioned with the inner surface of the connection hole.

[0047] A first convex ring 1344 is provided at the inner end of the sleeve of the first ceramic ring.

[0048] The outer diameter of the first convex ring is larger than the inner diameter of the connection hole.

[0049] The outer end of the second ceramic ring sleeve is provided with a second convex ring.

[0050] The outer diameter of the second convex ring is greater than the inner diameter of the connection hole.

[0051] In this embodiment, the inner end refers to the end close to the center of the fixed main body (the through hole), and the outer end refers to the end close to the edge of the part.

[0052] A counterbore is provided at the outer end of the connection hole, and the second ceramic ring sleeve is arranged in the counterbore.

[0053] The outer end of the electrode copper bar is provided with a thread, and the electrode copper bar is locked in the connection hole by using the thread to cooperate with the nut 1333.

[0054] The inner end of the electrode copper bar is provided with an installation plane, the installation plane is perpendicular to the end face of the electrode copper bar, and the electronic receiving sheet is installed on the installation plane by screws.

[0055] The detection circuit includes a number of shunted microammeters. Each electronic receiving sheet is correspondingly connected to the input end of a microammeter through a conductor, and the output end of the microammeter is connected to the control circuit.

[0056] The microammeter is a digital microammeter, and the power supply pin of the digital microammeter is connected to the power supply.

[0057] The tungsten target is arranged between the beam current detection device and the scanning box 15.

[0058] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples. The protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A beam detection device for an electron accelerator, characterized in that: The electron accelerator comprises an accelerating tube, a magnetic lens and a tungsten target, wherein the magnetic lens is arranged at the electron beam outlet of the accelerating tube, the beam current detection device is arranged between the magnetic lens and the tungsten target, and the beam current detection device comprises a fixed body, a plurality of electron receiving sheets, a conductor, an insulating member, a detection circuit and a control circuit. The fixed body is provided with a through hole, the electron receiving sheet is fixed around the through hole through an insulating member, the electron receiving sheet is connected to the conductor member, a plurality of connection holes are provided on the side of the fixed body, the conductor member is connected to the detection circuit through the connection holes, the detection circuit transmits a detection signal to the control circuit, and the control circuit transmits a control signal to the magnetic lens.

2. The beam detection device according to claim 1, characterized in that: The number of the electron receiving sheet and the connecting hole are both 4, and the electron receiving sheet is an arc-shaped sheet with a size matching that of the through hole.

3. The beam detection device according to claim 1, characterized in that: The conductor member comprises an electrode copper rod and a screw. The electrode copper rod is installed in the connection hole and one end of the electrode copper rod is fixed to an electron receiving sheet through the screw.

4. The beam detection device according to claim 3, characterized in that: The insulating part includes a first ceramic ring and a second ceramic ring, and the first ceramic ring and the second ceramic ring both include a sleeve, the inner surface of the sleeve is radially positioned with the outer surface of the electrode copper rod, and the outer surface of the sleeve is radially positioned with the inner surface of the connecting hole, a first convex ring is provided at the inner end of the first ceramic ring sleeve, and the outer diameter of the first convex ring is larger than the inner diameter of the connecting hole, and a second convex ring is provided at the outer end of the second ceramic ring sleeve, and the outer diameter of the second convex ring is larger than the inner diameter of the connecting hole.

5. The beam detection device according to claim 4, characterized in that: The outer end of the connecting hole is provided with a countersunk hole, the second ceramic ring sleeve is arranged in the countersunk hole, the outer end of the electrode copper rod is provided with a thread, and the electrode copper rod is locked in the connecting hole by using the thread and the nut.

6. The beam detection device according to claim 4, characterized in that: The inner end of the electrode copper rod is provided with a mounting plane, the mounting plane is perpendicular to the end surface of the electrode copper rod, and the electron receiving sheet is mounted on the mounting plane by means of screws.

7. The beam detection device according to claim 1, characterized in that: The detection circuit comprises a plurality of microammeters connected in parallel, each electron receiving sheet is correspondingly connected to an input end of a microammeter through a conductor, and an output end of the microammeter is connected to the control circuit.

8. The beam detection device according to claim 7, characterized in that: The microammeter is a digital microammeter, and a power pin of the digital microammeter is connected to a power source.

9. The beam detection device according to claim 1, characterized in that: The tungsten target is arranged between the beam detection device and the scanning box.

10. An electron accelerator, characterized in that: The electron accelerator comprises the beam detection device according to any one of claims 1 to 9.

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