A method and device for detecting the lateral position of a laser-driven proton beam
A technology of lateral position and laser detection, which is applied in nuclear technology and application fields, can solve the problems of low power and resolution that cannot meet the requirements, and achieve the effect of low emittance
Active Publication Date: 2020-07-28
PEKING UNIV
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Problems solved by technology
[0002] The laser plasma accelerator is a new type of accelerator that has developed rapidly in recent years. It can reach the acceleration gradient of TV / m and has a wide range of application prospects, such as cancer treatment, ion imaging, etc. In the specific implementation process, it is required to accurately measure the lateral position of the beam , due to the low power after laser-driven proton beam single-shot energy selection, the resolution of the existing devices for measuring the lateral position of the proton beam, such as oblique BPM and button BPM, cannot meet the requirements
Therefore, for the parameter conditions of the laser-driven proton beam, there is currently no mature equipment that can detect its lateral position
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[0018] The present invention will be further described below by example. It should be noted that the purpose of the disclosed embodiments is to help further understand the present invention, but those skilled in the art can understand that various replacements and modifications are possible without departing from the spirit and scope of the present invention and the appended claims of. Therefore, the present invention should not be limited to the content disclosed in the embodiments, and the protection scope of the present invention is subject to the scope defined in the claims.
[0019] The cavity-type BPM of the invention is used to measure laser-driven proton beams, and includes a rectangular resonant cavity and a beam conduit. A waveguide is used to extract the dipole mode in the resonant cavity, and a coupling antenna is used to extract the signal in the waveguide to an external circuit. The operating frequency is mainly determined by factors such as beam current spectru...
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The invention provides a method and device for detecting the lateral position of a laser-driven proton beam, and belongs to the field of nuclear technology and application. The device uses a cavity-type BPM to measure a laser-driven proton beam, fully utilizes the short pulse and the low emissivity of the laser-driven proton beam, measures the position of the proton beam under beam conditions of low electric quantity and large lateral distribution, and can achieve a position resolution less than 1mm under a PW-class laser acceleration system.
Description
technical field [0001] The invention proposes a method for detecting the lateral position of a laser-driven proton beam by using a cavity-type BPM, and belongs to the field of nuclear technology and application. Background technique [0002] The laser plasma accelerator is a new type of accelerator that has developed rapidly in recent years. It can reach the acceleration gradient of TV / m and has a wide range of application prospects, such as cancer treatment, ion imaging, etc. In the specific implementation process, it is required to accurately measure the lateral position of the beam , due to the low power after laser-driven proton beam single-shot energy selection, the resolution of the existing devices for measuring the lateral position of the proton beam, such as oblique BPM and button BPM, cannot meet the requirements. Therefore, for the parameter conditions of the laser-driven proton beam, there is currently no mature equipment that can detect its lateral position. C...
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IPC IPC(8): H05H7/00
CPCH05H7/001H05H2007/008
Inventor 朱昆李成财颜学庆林晨
Owner PEKING UNIV