Optical measurement method of charged particle beam energy
A charged particle beam, optical measurement technology, applied in the field of optical measurement of particle beam energy spectrum, can solve the problems of radiation field intensity limitation, complex device structure, etc., achieve easy adjustment of gas pressure, high energy resolution, and solve high-intensity pulse Effects of beam particle beam energy measurement problems
Active Publication Date: 2013-05-08
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0011] In order to solve the technical problems of the existing charged particle beam energy measurement method and device structure, which are limited by the intensity of the radiation field when used, the present invention provides a method that can be applied to steady-state and pulsed radiation fields at the same time, with good energy resolution and a wide range. Wide, simple, convenient and tunable optical measurement method of charged particle beam energy
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[0052] The size of the flashing light-emitting cavity 3 of the light-emitting component is 400mm×150mm×150mm. The flashing light-emitting cavity 3 is welded by A3 steel plate, and the front wall hole is The entrance window 2 is a 5μm titanium film with a diameter of Collimation shield 1 outer diameter The inner hole is The thickness is 20mm. The proton beam passes through the window of the accelerator beam pipe 10 , passes through the inner hole of the collimating shield 1 , and enters the gas scintillator 4 through the incident window 2 . The distance between the window of the beam duct 10 and the outside of the front surface of the scintillation light cavity 3 is 50mm. The size of the quartz glass window 5 is The thickness is 10mm, and the center of the quartz glass window is 260mm away from the front face of the flashing light-emitting cavity 3 . The material of the quartz glass window 5 is synthetic quartz (JGS1), and its transmittance is greater than 80% at 185n...
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The invention relates to an optical measurement method of charged particle beam energy. The method comprises the following steps that: a charged particle beam is collimated and then enters a sealed scintillant luminous cavity filled with a gaseous scintillator, so that the gaseous scintillator becomes luminous, and at least one imaging assembly arranged at the scintillant luminous cavity is utilized to record spatial distribution image information of the particle beam in the luminous gaseous scintillator; and postprocessing is carried out on the recorded information so as to obtain energy information of the incident particle beam. According to the invention, technical problems that an existing measurement method of charged particle beam energy is complicated and is limited by radiation filed intensity when in use and the like are solved; meanwhile, the provided method can be simultaneously applied to stable state and pulse radiation fields and has advantages of visual measurement, good energy resolution, wide measuring range as well as simple, convenient and adjustable properties and the like; moreover, the method is suitable for energy measurement on various charged particle beams.
Description
technical field [0001] The invention relates to an optical measurement method of particle beam energy spectrum. Background technique [0002] The energy spectrum is the main parameter index to characterize the characteristics of the radiation field, and it is an indispensable and important parameter in the research of nuclear physics and the application of nuclear technology. The energy of incident particles determines the process and nature of nuclear reactions, cross-section, reaction exit path, etc. Therefore, in nuclear physics research, it is necessary to know the change of the number of particles with energy, that is, the energy spectrum of particles. In ion therapy, in order to accurately calculate the dose of the irradiated area, it is also necessary to know the energy of the incident ions and the information of their deposition distribution. For example, in the case of proton (heavy ion) treatment of cancer, the radiation dose equivalent of protons changes very ste...
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IPC IPC(8): G01T1/36
Inventor 欧阳晓平刘金良张忠兵陈亮韩长才
Owner NORTHWEST INST OF NUCLEAR TECH