阅读说明：本技术 一种电子加速器束流强度实时监测装置 (Electron accelerator beam intensity real-time monitoring device ) 是由 陈光荣 巩新胜 周国梁 马超 徐建慧 李传南 于 2020-05-21 设计创作，主要内容包括：本发明公开了一种电子加速器束流强度实时监测装置,涉及电子加速器技术,特别涉及电子束流控制技术；本发明所要解决的技术问题是,束流强度监测装置串接于真空系统当中容易损坏、维修困难；其特征在于：包括法拉第装置、两个调整固定罩、束流检测模块；法拉第装置安装于输出盒法兰窗下面,调整固定罩为无盖长方箱体结构,作用是把法拉第装置固定在输出盒下口,调整固定罩设置有螺栓,用于精细调整法拉第装置与输出盒的相对位置,所述束流检测模块用于束流信号采样、放大、处理及显示；本发明的优点是,束流强度监测装置安装在真空系统外,不易损坏,更换时不破坏真空,有利于电子加速器连续稳定工作。(The invention discloses a real-time monitoring device for beam intensity of an electron accelerator, which relates to the electron accelerator technology, in particular to the electron beam flow control technology; the invention aims to solve the technical problems that a beam intensity monitoring device is connected in series in a vacuum system and is easy to damage and difficult to maintain; the method is characterized in that: comprises a Faraday device, two adjusting fixed covers and a beam current detection module; the Faraday device is arranged below a flange window of the output box, the adjusting and fixing cover is of a uncovered rectangular box structure and is used for fixing the Faraday device at the lower opening of the output box, the adjusting and fixing cover is provided with a bolt for finely adjusting the relative position of the Faraday device and the output box, and the beam detection module is used for sampling, amplifying, processing and displaying beam signals; the beam intensity monitoring device has the advantages that the beam intensity monitoring device is arranged outside a vacuum system, is not easy to damage, does not damage vacuum during replacement, and is beneficial to continuous and stable work of the electron accelerator.)

1. The utility model provides an electron accelerator beam intensity real-time supervision device which characterized in that: comprises two Faraday devices (1), two adjusting fixed covers (2) and a beam current detection module (11); the Faraday device (1) is arranged below the output box flange window, the Faraday device is a rectangular hollow frame in general shape, two long edges of the Faraday device are respectively used as a front edge and a rear edge, the size of the frame body is just overlapped with that of the output box flange window frame body, and the center of the Faraday device is consistent with that of the output box; the adjusting and fixing cover (2) is of a uncovered rectangular box structure, one of the adjusting and fixing covers is used for being sleeved into a flange window of the stacked output box and the front edge of the Faraday device (1), the other one of the adjusting and fixing covers is used for being sleeved into a flange window of the stacked output box and the rear edge of the Faraday device (1), the adjusting and fixing cover has the function of fixing the Faraday device (1) at the lower opening of the output box, and the size of the inner space of the box is slightly larger than the length and the height of the front edge vertical face or the rear edge vertical face of the stacked output box flange window and; the adjusting and fixing cover (2) is provided with a side bolt (3), a front bolt (4) and an upper bolt (5) and is used for finely adjusting the relative position of the Faraday device (1) and the output box; the beam detection module (11) is arranged in an accelerator auxiliary machine chamber, is electrically connected with the Faraday device (1), and is provided with a load resistor (12), a pulse beam sampling circuit, a pulse beam post-amplification circuit, a beam integral amplification circuit and a beam monitoring display circuit.

2. The device for monitoring the beam intensity of the electron accelerator in real time as claimed in claim 1, wherein: the Faraday device (1) comprises a winding (6), a magnetic core (7), silica gel (8), a magnetic core groove (9) and a cover plate (10); the winding (6) adopts high-temperature-resistant wires, is uniformly wound on the magnetic core (7) clockwise and is led out of the magnetic core groove (9); the magnetic core (7) is of a rectangular frame structure, a nano amorphous material is adopted, and the inner frame is slightly larger than the size of the titanium die of the output box; the silica gel (8) is poured in a magnetic core groove (9) where the winding magnetic core (7) is placed; the magnetic core groove (9) is arranged in the four side frames of the Faraday device (1) and surrounds the periphery, the upper surface of the magnetic core groove is open, polyethylene epoxy resin materials are preferred, ceramics can be selected, and the magnetic core groove (9) can accommodate a winding magnetic core (7); the cover plate (10) is preferably made of polyethylene epoxy resin materials, can also be made of ceramics, and is covered on the magnetic core groove (9) through a rectangular hollow thin plate frame and fixed through countersunk screws.

3. The device for monitoring the beam intensity of the electron accelerator in real time as claimed in claim 1, wherein: the roughness of the screw ends of the adjusting fixing cover (2), the side bolt (3), the front bolt (4) and the upper bolt (5) is a semi-smooth surface; the front bolt (4) is arranged on a vertical plane of two long edges of the adjusting fixed cover (2), and the screw end is propped against the frame of the Faraday device (1) during rotation; the side bolt (3) is arranged on the side surface of the adjusting fixed cover (2), and the screw end is propped against the frame of the Faraday device (1) during rotation; the upper bolts (5) are arranged in a plurality and embedded on the adjusting fixing cover (2), and the screw end abuts against the flange window of the output box during rotation.

4. The device for monitoring the beam intensity of the electron accelerator in real time as claimed in claim 1, wherein: the beam detection module (11) comprises a load resistor (12), a pulse beam sampling circuit, a pulse beam post-amplification circuit, a beam integral amplification circuit and a beam monitoring display circuit which are electrically connected in sequence; and two ends of the load resistor (12) are electrically connected with two ends of the winding (6), and a high-precision non-inductive resistor is adopted.

Technical Field

The present invention relates to electron accelerator technology, and more particularly, to electron beam flow control technology.

Background

The electron beam of the electron accelerator continuously obtains energy in an acceleration system and accelerates, the beam intensity is an important parameter index when the electron accelerator operates, the index directly influences the irradiation dose size absorbed by high-energy electrons in an irradiated substance, and in order to control the accuracy of the irradiation dose, the beam intensity change condition of the electron accelerator needs to be monitored in real time in the irradiation process.

The Faraday cage is the most common beam intensity measuring device of an electron accelerator and is generally installed in a vacuum pipeline of an acceleration system, the components of the acceleration system are sequentially installed into an electron gun, an accelerating tube, a beam scraper, a Beam Converter (BCT), a scanning box and an output box, the lowermost end of the output box is a flange window which is a rectangular hollow frame, and a titanium die is fixed on the hollow part to isolate the internal vacuum from the air. The beam converter is a beam intensity monitoring device based on the Faraday cage principle and is connected in series with a vacuum system. When the electron accelerator outputs large beams, due to vacuum change, heating of a vacuum pipeline and other reasons, beam envelope edge electron scattering is caused, an accelerating tube, a beam converter and the like are easily damaged, and the service life of the beam converter is generally half a year to one year. When the beam converter is replaced, the vacuum needs to be broken, and after maintenance, the vacuum needs to be reestablished for a plurality of days, so that the work of the accelerator is delayed. Compared with the invention with the application number of 201010569876.X, the invention discloses an electron accelerator electron beam monitoring device, and the invention with the application number of 201210140602.8 discloses a device for real-time monitoring of electron accelerator beam intensity, which are connected in series in a vacuum system. Therefore, the beam intensity real-time monitoring device arranged outside the vacuum pipeline is designed, and the working requirements are met.

Disclosure of Invention

The invention aims to solve the technical problem of providing a real-time beam intensity monitoring device of an electron accelerator, which is arranged outside a vacuum system, is not easy to damage, does not damage vacuum during replacement and is beneficial to continuous and stable work of the electron accelerator.

In order to achieve the above object, the present invention provides a real-time monitoring device for beam intensity of an electron accelerator, comprising: comprises a Faraday device 1, two adjusting fixed covers 2 and a beam current detection module 11; the Faraday device 1 is arranged below a flange window of the output box, is generally a rectangular hollow frame, has two long sides respectively used as a front edge and a rear edge, is just overlapped with the flange window frame of the output box in size, and has the center consistent with the center of the output box and is used for capturing beam signals; the adjusting and fixing cover 2 is of a uncovered rectangular box structure, one of the adjusting and fixing covers is used for being sleeved into the front edge of the flange window of the stacked output box and the Faraday device 1, the other one of the adjusting and fixing covers is used for being sleeved into the rear edge of the flange window of the stacked output box and the Faraday device 1, the adjusting and fixing cover has the function of fixing the Faraday device 1 at the lower opening of the output box, the size of the inner space of the box is slightly larger than the length and the height of the vertical surface of the front edge or the vertical surface of the rear edge of the flange window of the stacked; the adjusting and fixing cover 2 is provided with a side bolt 3, a front bolt 4 and an upper bolt 5, and is used for finely adjusting the relative position of the Faraday device 1 and the output box to ensure accurate measurement; the beam detection module 11 is installed in an auxiliary accelerator chamber, is electrically connected with the faraday device 1, is provided with a load resistor 12, a pulse beam sampling circuit, a pulse beam post-amplification circuit, a beam integral amplification circuit and a beam monitoring display circuit, and is used for sampling, amplifying, processing and displaying beam signals.

The Faraday device 1 comprises a winding 6, a magnetic core 7, silica gel 8, a magnetic core groove 9 and a cover plate 10; the winding 6 adopts a high-temperature resistant wire, is uniformly wound on the magnetic core 7 clockwise and is led out of the magnetic core groove 9; the magnetic core 7 is of a rectangular frame structure, is made of a nano amorphous material, and has an inner frame slightly larger than the size of the titanium die of the output box, so that all electron beams penetrating out of the titanium die are enveloped; the silica gel 8 is poured in a magnetic core groove 9 in which the winding magnetic core 7 is placed, so that fixation and radiation protection are realized; the magnetic core groove 9 is arranged in the four side frames of the Faraday device 1, surrounds the periphery, is open on the upper surface, is preferably made of polyethylene epoxy resin materials, can also be made of ceramics, has a radiation-resistant effect, and can accommodate the winding magnetic core 7; the cover plate 10 is preferably made of polyethylene epoxy resin material, or ceramic, or a rectangular hollow thin plate frame, covers the upper surface of the magnetic core groove 9, and is fixed by countersunk screws.

The screw ends of the adjusting fixing cover 2, the side bolt 3, the front bolt 4 and the upper bolt 5 are semi-smooth surfaces, so that stable fixing is facilitated; the front bolt 4 is arranged on a vertical plane of two long sides of the adjusting fixed cover 2, and the screw end is propped against the frame of the Faraday device 1 during rotation, so that the front and back positions of the Faraday device can be adjusted; the side bolt 3 is arranged on the side of the adjusting fixed cover 2, and the screw end is propped against the frame of the Faraday device 1 during rotation, so that the left and right positions of the Faraday device can be adjusted; the upper bolts 5 are arranged in a plurality and embedded on the adjusting fixing cover 2, and the screw ends abut against the flange window of the output box during rotation to adjust the contact tightness between the upper surface of the Faraday device 1 and the lower surface of the output box.

The beam detection module 11 comprises a load resistor 12, a pulse beam sampling circuit, a pulse beam post-amplification circuit, a beam integral amplification circuit and a beam monitoring display circuit which are electrically connected in sequence, so that the real-time display of the pulse beam can be realized; and two ends of the load resistor 12 are electrically connected with two ends of the winding 6, and a high-precision non-inductive resistor is adopted, so that the accuracy of measuring the peak value of the pulse beam is improved when the electron accelerator works in a pulse state.

The invention has the advantages that: the beam intensity monitoring device is installed outside a vacuum system, is not easy to damage, does not damage vacuum during replacement, and is beneficial to continuous and stable work of the electron accelerator.

Drawings

The technical scheme of the invention is further explained in detail by combining the attached drawings and the detailed implementation mode;

FIG. 1 is a schematic view of the butt joint of the device of the present invention and an accelerator output box;

FIG. 2 is a schematic view of a beam detection module;

FIG. 3 is a schematic view of a Faraday device;

in the figure: 1. a Faraday device; 2. adjusting the fixed cover; 3. a side bolt; 4. a face bolt; 5. an upper bolt; 6. winding; 7. a magnetic core; 8. silica gel; 9. a magnetic core slot; 10. a cover plate; 11. a beam detection module; 12. a load resistance.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following structure of the present invention is further described in detail with reference to the accompanying drawings.

A real-time beam intensity monitoring device of an electron accelerator comprises a Faraday device 1, two adjusting fixed covers 2 and a beam detection module 11; the Faraday device 1 is arranged at the lower opening of a flange window of the output box, is generally a rectangular hollow frame, has two long sides respectively used as a front edge and a rear edge, is just overlapped with the flange window frame of the output box in size, and has the center consistent with the center of the output box and is used for capturing beam signals; the adjusting and fixing cover 2 is of a uncovered rectangular box structure, one is used for being sleeved into the front edge of the stacked output box flange window and the Faraday device 1, the other is used for being sleeved into the rear edge of the stacked output box flange window and the Faraday device 1, the adjusting and fixing cover has the function of fixing the Faraday device 1 below the output box, and the size of the internal space allows slight position adjustment; the adjusting and fixing cover 2 is provided with a side bolt 3, a front bolt 4 and an upper bolt 5, and is used for finely adjusting the relative position of the Faraday device 1 and the output box to ensure accurate measurement; the beam detection module 11 is installed in an auxiliary accelerator chamber, is electrically connected with the faraday device 1, is provided with a load resistor 12, a pulse beam sampling circuit, a pulse beam post-amplification circuit, a beam integral amplification circuit and a beam monitoring display circuit, and is used for sampling, amplifying, processing and displaying beam signals.

The Faraday device 1 comprises a winding 6, a magnetic core 7, silica gel 8, a magnetic core groove 9 and a cover plate 10; the magnetic core 7 is of a rectangular frame structure, is made of a nano amorphous material, and has an inner frame which is slightly larger than the size of the titanium die of the output box so as to envelop all electron beams penetrating out of the titanium die; the silica gel 8 is poured in a magnetic core groove 9 in which the winding magnetic core 7 is placed, so that fixation and radiation protection are realized; the magnetic core groove 9 is arranged in the four side frames of the Faraday device 1, surrounds the periphery, and is open on the upper surface, and the size of the magnetic core groove 9 can be used for placing the winding magnetic core 7; the cover plate 10 covers the upper surface of the magnetic core groove 9 and is fixed by countersunk screws.

The roughness of the screw ends of the adjusting fixing cover 2, the side bolt 3, the front bolt 4 and the upper bolt 5 is a semi-smooth surface; the front bolt 4 is arranged on a vertical plane of two long sides of the adjusting fixed cover 2, and the screw end is propped against the frame of the Faraday device 1 during rotation, so that the front and back positions of the Faraday device can be adjusted; the side bolt 3 is arranged on the side of the adjusting fixed cover 2, and the screw end is propped against the frame of the Faraday device 1 during rotation, so that the left and right positions of the Faraday device can be adjusted; the upper bolts 5 are arranged in a plurality and embedded on the adjusting fixing cover 2, and the screw ends abut against the flange window of the output box during rotation to adjust the contact tightness between the upper surface of the Faraday device 1 and the lower surface of the output box.

The above detailed description is only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.