Electron beam collecting and detecting device of electron accelerator

Abstract

The utility model discloses an electron accelerator electron beam collecting and detecting device which comprises an upper connecting support, a main shaft bolt, a support and a beam collecting water target, a water path is arranged in the beam collecting water target, and a water inlet and a water outlet of the water path are respectively connected with a water inlet end and a water outlet end of external water circulation cooling equipment through connecting pipelines; the upper connecting support is fixed to the side wall of the scanning box, a support is installed on the side wall of the beam collecting water target, the upper connecting support and the support are each provided with an opening used for avoiding the spindle bolt, the support is rotationally connected with the upper locking nut through the spindle bolt and nut, and the beam collecting water target is located below the scanning box. An insulation assembly is arranged between the main shaft bolt and the support and used for achieving insulation and connection between the main shaft bolt and the support. According to the utility model, convenient switching between accelerator testing and irradiation production can be realized, overheat water temperature and drifting of a large amount of water vapor can be effectively prevented, and the risk of short circuit of an accelerator circuit can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of linear electron accelerators, in particular to an electron beam collection and detection device for an electron accelerator. Background Art

[0002] An accelerator is a device used to accelerate charged particles (e.g., electrons, protons, etc.) using electric and / or magnetic fields. Measuring the power and waveform of an electron accelerator beam is a common and straightforward method to measure the current generated by the beam.

[0003] Current technology allows for directing an electron beam onto a target material. The target material is typically a high-density material, such as a metal (like tungsten or copper) or a liquid (like water). When the electron beam interacts with the target material, they transfer energy and produce electron-electron interactions, electron-atom interactions, or other forms of interactions. As electrons interact with the target material, an electric current may be generated. For example, when electrons hit the target material, they cause electrons in the target material to flow, generating an electric current. The magnitude of this current depends on the intensity and energy of the beam, as well as the properties of the target material. An ammeter or current sensor is used to measure the generated current. By measuring the generated current and combining it with the characteristics of the target material used, the power of the beam can be calculated.

[0004] Most existing technologies use water as the target material, which is low-priced, easy to use, and has good results. Generally, water is stored in a one-meter-long water tank and placed directly below the beam outlet window. The water tank, detection circuit, milliammeter, and building grounding electrode form a detection circuit. In actual use, because the accelerator operation status needs to be observed for a long time, often for more than 8 hours or several days in a row, a large amount of heat will be generated in the electron beam inflow water, causing the water to evaporate less and less. During this period, manual water addition is required to meet the test requirements. The test is often interrupted and the workload of adding water is large. At the same time, the large amount of water vapor generated will evaporate onto the surface of circuit components such as the accelerator head, causing a short circuit hazard. Moreover, when switching between accelerator testing, debugging and irradiation production, the water tank needs to be frequently moved on and off the beam conveyor line, which is extremely inconvenient to operate. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an electron accelerator electron beam collection and detection device.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An electron accelerator electron beam collection and detection device comprises: an upper connecting bracket, a main shaft bolt, a bracket and a beam collection water target, wherein a water channel is provided inside the beam collection water target, and a water inlet and a water outlet of the water channel are provided on the side wall of the beam collection water target, and the water inlet and the water outlet are respectively connected to the water inlet and outlet of an external water circulation cooling device through connecting pipes;

[0008] The upper connecting bracket is fixed to the side wall of the scanning box, and a bracket is fixedly installed on the side wall of the beam collecting water target. The upper connecting bracket and the bracket are both provided with openings for avoiding the main shaft bolt. The bracket is rotatably connected to the main shaft bolt, the nut and the upper locking nut, and the beam collecting water target is located below the scanning box.

[0009] An insulating component is provided between the main shaft bolt and the bracket to achieve insulation and connection between the main shaft bolt and the bracket.

[0010] As a possible implementation manner, further, the beam collecting water target has a size capable of completely covering the electron beam extraction window at the bottom of the scanning box.

[0011] As a possible implementation manner, further, the opening on the bracket is provided with an upwardly extending annular protrusion;

[0012] The insulating assembly includes an insulating block locking nut, an outer insulating block, and an inner insulating block. The outer insulating block is sleeved on the outer side of the annular protrusion on the bracket, the inner insulating block is sleeved on the main shaft bolt, and the inner insulating block is inserted into the opening on the bracket. The insulating block locking nut is threadedly connected to the main shaft bolt, and its lower end abuts against the outer insulating block and / or the inner insulating block.

[0013] As a possible implementation manner, further, the top surface of the annular protrusion on the bracket is lower than the top surfaces of the outer insulating block and the inner insulating block.

[0014] As a possible implementation manner, further, the water inlet and the water outlet are on the same side as the bracket, and the bracket is provided with an opening for avoiding the water inlet and the water outlet connection pipeline.

[0015] As a possible implementation manner, further, the upper end of the main shaft bolt passes through the opening on the upper connecting bracket, and the upper and lower ends of the upper connecting bracket are respectively provided with an upper locking nut and a lower locking nut, and the upper locking nut and the lower locking nut are clamped at the upper and lower ends of the upper connecting bracket, and are respectively connected to the threads on the main shaft bolt.

[0016] As a possible implementation manner, further, a wiring terminal is threadedly connected to the side wall of the beam collecting water target, and the wiring terminal is inserted into the water channel inside the beam collecting water target.

[0017] The beneficial effects of the present invention are:

[0018] The electron beam collection and detection device for an electron accelerator provided by this utility model can effectively avoid the potential short-circuit risk caused by water vapor during electron accelerator beam power testing. During use, the device's own structural rotation can block or avoid the beam extraction window at the bottom of the scanning box, enabling convenient switching between accelerator testing and irradiation production. Water flows through the device through the water inlet and outlet, eliminating the need for frequent water additions and uninterrupted testing and debugging. This improves detection efficiency and shortens overall detection time, making it suitable for further promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the electron beam collection and detection device of the electron accelerator in the present utility model;

[0020] Figure 2 This is a schematic diagram of the installation of the electron beam collection and detection device of the electron accelerator in the present utility model;

[0021] Figure 3 It is an enlarged view of part I;

[0022] Figure 4 This is a schematic diagram of the connection between the beam collection water target and the bracket;

[0023] Figure 5 This is a schematic diagram of the structure of the beam collection water target;

[0024] Figure 6 Side view of the beam collecting water target;

[0025] Figure 7 This is the pulse waveform diagram when the accelerator parameters are in the optimal state;

[0026] Figure 8 This is the pulse waveform diagram when the accelerator parameters are not optimal.

[0027] The reference numerals in the accompanying drawings are as follows:

[0028] Scanning box-1; spindle bolt-2; upper locking nut-3; upper connecting bracket-4; lower locking nut-5; insulating block locking nut-6; outer insulating block-7; inner insulating block-8; bracket-9; beam collection water target-10; milliammeter-11; oscilloscope-12; water channel-101; terminal block-102; water inlet-1011; water outlet-1012. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] Refer to the attached Figure 1-6 As shown, this embodiment provides an electron accelerator electron beam collection detection device, comprising: an upper connecting bracket 4, a main shaft bolt 2, a bracket 9 and a beam collection water target 10. The beam collection water target 10 is provided with a water channel 101 inside. The water inlet 1011 and the water outlet 1012 of the water channel 101 are provided on the side wall of the beam collection water target 10. The water inlet 1011 and the water outlet 1012 are respectively connected to the water inlet and outlet of an external water circulation cooling device (not shown) through connecting pipes. The beam collection water target 10 is mainly made of stainless steel. When in use, the water in the water channel 101 inside the beam collection water target 10 is circulated and cooled by the external water circulation cooling device, eliminating the need for frequent water addition and uninterrupted testing and debugging work, thereby improving the detection efficiency of the electron accelerator beam power.

[0031] In addition, the water flowing in the water channel 101 inside the beam collecting water target 10 will take away the high temperature generated by the long-term irradiation of the electron beam, preventing the water from overheating and evaporating; in addition, since the beam collecting water target 10 is a closed space, no water vapor can be emitted and drift onto the surface of the accelerator high-voltage components, avoiding the risk of circuit short circuit.

[0032] The upper connecting bracket 4 is fixed to the side wall of the scanning box 1 by bolts, and a bracket 9 is fixedly installed on the side wall of the beam collecting water target 10. In this embodiment, the water inlet 1011 and the water outlet 1012 are on the same side as the bracket 9, and an opening is opened on the bracket 9 for avoiding the connection pipes of the water inlet 1011 and the water outlet 1012 to facilitate the connection of the connection pipes at the water inlet 1011 and the water outlet 1012.

[0033] Both the upper connecting bracket 4 and the bracket 9 are provided with openings for avoiding the main shaft bolt 2. The bracket 9 is rotatably connected to the nut and the upper locking nut 3 through the main shaft bolt 2, and the beam collecting water target 10 is located below the scanning box 1. The size of the beam collecting water target 10 can completely cover the electron beam outlet window at the bottom of the scanning box 1, so that the beam collecting water target can completely receive all electron beams emitted from the scanning box 1.

[0034] When beam power testing is required, the beam-collecting water target 10 is precisely rotated to a position directly below the scanning box 1. In this position, the beam-collecting water target can fully receive the entire electron beam emitted from the scanning box 1, thereby achieving accurate measurement of the beam power. When it is necessary to switch to the testing or production mode for irradiated goods, the beam-collecting water target 10 can be rotated to the side of the scanning box 1, completely avoiding the electron beam outlet window of the scanning box 1. In this way, the electron beam can be fully incident on the irradiated product below without hindrance, allowing for effective irradiation treatment. This method allows for convenient switching between accelerator testing and irradiation production.

[0035] Refer to the attached Figure 3-4 As shown, an insulating component is provided between the main shaft bolt 2 and the bracket 9 to achieve insulation and connection between the main shaft bolt 2 and the bracket 9. In this embodiment, an annular protrusion extending upward is provided at the opening on the bracket 9;

[0036] The insulating assembly includes an insulating block locking nut 6, an outer insulating block 7, and an inner insulating block 8. The outer insulating block 7 is sleeved on the outside of the annular protrusion on the bracket 9, and the inner insulating block 8 is sleeved on the main shaft bolt 2. The inner insulating block 8 is inserted into the opening on the bracket 9. Through this arrangement, the main shaft bolt 2 can be isolated to avoid the connection between the main shaft bolt 2 and the bracket 9.

[0037] The insulating block locknut 6 is threaded onto the spindle bolt 2. The top surface of the annular projection on the bracket 9 is lower than the top surfaces of the outer insulating block 7 and the inner insulating block 8. This is to prevent the insulating block locknut 6 from contacting the annular projection on the bracket 9. The lower end of the insulating block locknut 6 abuts the outer insulating block 7 and / or the inner insulating block 8; in this embodiment, the insulating block locknut 6 also abuts the tops of the outer insulating block 7 and the inner insulating block 8. Among them, the setting of the outer insulating block 7 and the inner insulating block 8 is mainly to prevent the main shaft bolt 2 from contacting the insulating block locking nut 6 and the bracket 9; if the bracket 9 comes into contact with the main shaft bolt 2 and / or the insulating block locking nut 6, the bracket 9 is in a conductive state with the upper connecting bracket 4 and the scanning box 1 body (the scanning box 1 body is grounded during use), and the electrons generated on the beam collection water target 10 will flow away through the grounding on the side of the scanning box 1, so that the electrons no longer flow through the detection circuit, milliammeter or oscilloscope, and the beam size cannot be detected; therefore, it is necessary to isolate the main shaft bolt 2 from the insulating block locking nut 6 and the bracket 9 to prevent the main shaft bolt 2 from contacting the insulating block locking nut 6 and the bracket 9. In this way, the electron beam can flow along the expected path and flow through the milliammeter or oscilloscope in the detection circuit, thereby achieving accurate detection of the electron beam.

[0038] Refer to the attached Figure 1 and 3As shown, the upper end of the spindle bolt 2 passes through the opening in the upper connecting bracket 4. The upper and lower ends of the upper connecting bracket 4 are respectively provided with an upper locking nut 3 and a lower locking nut 5. The upper locking nut 3 and the lower locking nut 5 are clamped at the upper and lower ends of the upper connecting bracket 4 and are respectively connected to the spindle bolt 2 through threads; this method can realize the connection between the spindle bolt 2 and the upper connecting bracket 4. During use, the beam collection water target 10 can be rotated along the spindle bolt 2 by pushing it, thereby achieving the position adjustment of the beam collection water target 10.

[0039] Refer to the attached Figure 2 、 4 As shown in Figure 5 , a terminal block 102 (made of a conductive material such as copper or steel) is threadedly connected to the beam collection water target 10. Terminal block 102 is inserted into the water channel 101 within the beam collection water target 10 and is connected to an external detection system. Because terminal block 102 is inserted into the water channel 101 within the beam collection water target 10, it establishes equipotential communication with the water flow within the beam collection water target 10. When the electron beam is incident on the water flow within the beam collection water target 10, the water flow acts as a conductor, conducting the current generated by the electron beam to terminal block 102. This current is then transmitted to the detection system through terminal block 102, thereby enabling the reading of the average beam current value and the observation of the pulsed beam waveform.

[0040] In this embodiment, the detection system consists of a detection circuit and a milliammeter 11. The beam collecting water target 10, the detection circuit and the milliammeter 11 constitute a detection loop. The detection circuit includes R1, R2, C1, and C2. One end of R2 is connected to the terminal 102, and the other end is connected to R1. The other end of R1 is grounded. C1 and C2 are connected in parallel with R1. The milliammeter 11 is connected to both ends of R1. An oscilloscope 12 is connected to both ends of R2. The oscilloscope 12 can detect the pulse beam online and is used to observe the waveform of the pulse beam and measure the waveform width and amplitude.

[0041] After the electron beam is collected by beam-collecting water target 10, it generates a pulsed square wave current in the water flow within it, which flows through milliammeter 11 and oscilloscope 12. During the pulse period, the current in the detection circuit charges capacitors C1 and C2. After the pulse ends, the charge on the capacitors is discharged through R1. When the pulse frequency stabilizes, the voltage across the capacitors becomes a slightly jagged DC level, averaging the short pulse current into a DC level, making the reading on milliammeter 11 more stable.

[0042] In this embodiment, the oscilloscope 12 is connected to both ends of R2 to detect the pulse beam online. According to the observed pulse waveform, it can be judged whether the accelerator parameter debugging is in the optimal state. In the optimal state, the bottom of the pulse beam waveform is flat and there is no tilt phenomenon, as shown in the attached figure. Figure 7 When the accelerator parameters are not in the optimal state, the waveform of the pulse beam will change, as shown in the attached figure. Figure 8 shown.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electron accelerator electron beam collection and detection device, characterized in that: include: An upper connecting bracket (4), a main shaft bolt (2), a bracket (9) and a beam collecting water target (10) are connected; a water channel (101) is provided inside the beam collecting water target (10); a water inlet (1011) and a water outlet (1012) of the water channel (101) are provided on a side wall of the beam collecting water target (10); the water inlet (1011) and the water outlet (1012) are respectively connected to the water inlet and outlet of an external water circulation cooling device through connecting pipes; The upper connecting bracket (4) is fixed on the side wall of the scanning box (1), and a bracket (9) is fixedly installed on the side wall of the beam collecting water target (10). The upper connecting bracket (4) and the bracket (9) are both provided with openings for avoiding the main shaft bolt (2). The bracket (9) is rotatably connected to the nut and the upper locking nut (3) through the main shaft bolt (2), and the beam collecting water target (10) is located below the scanning box (1); An insulating component is provided between the main shaft bolt (2) and the bracket (9) for achieving insulation and connection between the main shaft bolt (2) and the bracket (9).

2. The electron accelerator electron beam collection and detection device according to claim 1, characterized in that: The beam collecting water target (10) has a size capable of completely covering the electron beam outlet window at the bottom of the scanning box (1).

3. The electron accelerator electron beam collection and detection device according to claim 1, characterized in that: An upwardly extending annular protrusion is provided at the opening of the bracket (9); The insulating assembly comprises an insulating block locking nut (6), an outer insulating block (7), and an inner insulating block (8); the outer insulating block (7) is sleeved on the outer side of the annular protrusion on the bracket (9); the inner insulating block (8) is sleeved on the spindle bolt (2); the inner insulating block (8) is inserted into the opening on the bracket (9); the insulating block locking nut (6) is threadedly connected to the spindle bolt (2), and its lower end abuts against the outer insulating block (7) and / or the inner insulating block (8).

4. The electron accelerator electron beam collection and detection device according to claim 3, characterized in that: The top surface of the annular protrusion on the bracket (9) is lower than the top surfaces of the outer insulating block (7) and the inner insulating block (8).

5. The electron accelerator electron beam collection and detection device according to claim 1, characterized in that: The water inlet (1011) and the water outlet (1012) are on the same side as the bracket (9), and the bracket (9) is provided with an opening for avoiding the connection pipelines of the water inlet (1011) and the water outlet (1012).

6. The electron accelerator electron beam collection and detection device according to claim 3, characterized in that: The upper end of the main shaft bolt (2) passes through the opening on the upper connecting bracket (4), and the upper and lower ends of the upper connecting bracket (4) are respectively provided with an upper locking nut (3) and a lower locking nut (5). The upper locking nut (3) and the lower locking nut (5) are clamped at the upper and lower ends of the upper connecting bracket (4) and are respectively connected to the main shaft bolt (2) by threads.

7. The electron beam collection and detection device for an electron accelerator according to claim 6, characterized in that: A connecting terminal (102) is threadedly connected to the side wall of the beam collecting water target (10), and the connecting terminal (102) is inserted into the water channel (101) inside the beam collecting water target (10).

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