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Device and method for measuring depth dose distribution based on proton irradiation source

A technology of dose distribution and proton irradiation, applied in dosimeters and other directions, can solve the problems of high measurement cost and complicated measurement method, and achieve the effect of low measurement cost, simple measurement method and accurate measurement result

Active Publication Date: 2020-04-10
SHENZHEN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method for measuring depth dose distribution based on a proton irradiation source in view of the above defects of the prior art. The material superposition measurement method of thickness is easily affected by factors such as uneven material division and air mixed in the gap during measurement, resulting in large error in measurement results. However, the measurement method is complicated and the measurement cost is high by changing the thickness of the measurement sample to measure the sample multiple times. question

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  • Device and method for measuring depth dose distribution based on proton irradiation source
  • Device and method for measuring depth dose distribution based on proton irradiation source
  • Device and method for measuring depth dose distribution based on proton irradiation source

Examples

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Embodiment 1

[0066] use as figure 1 The measuring device shown, wherein the material of the first wedge-shaped mold body and the second wedge-shaped mold body is polyethylene, and the length, width and height of the first wedge-shaped mold body and the second wedge-shaped mold body are respectively 70mm, 40mm and 50mm, shielded The material of the layer is aluminum with a thickness of 10.15mm. The first color-developing film dosimeter is the MD-55-2 film dosimeter of the GAFChromic series produced by the American Xiyuan Company. The proton energy is 101.34MeV, and the irradiation fluence rate is 7.112e+07p / cm 2 / s, the proton beam with a radiation dose rate of 6.59Rad / s passes through the shielding layer and the second wedge-shaped phantom and irradiates the first chromogenic film dosimeter. The irradiation time is 141s. The measurement results of the depth dose distribution in , and the simulation calculation results corresponding to the measurement results are obtained through the Geant...

Embodiment 2

[0068] The difference from Example 1 is that the material of the shielding layer is aluminum with a thickness of 5.98mm, the proton energy is 60.81MeV, and the radiation fluence rate is 3.094e+07p / cm 2 / s, the irradiation dose rate is 4.202Rad / s, and the irradiation time is 324s, the measurement results of the depth dose distribution of the proton beam in the second wedge-shaped phantom are obtained, and the simulation calculation results corresponding to the measurement results are obtained by Geant4 software ,Such as Figure 4 shown.

Embodiment 3

[0070] The difference from Example 1 is that the material of the shielding layer is polyethylene with a thickness of 28.74mm, the proton energy is 101.34MeV, and the radiation fluence rate is 7.123e+07p / cm 2 / s, the irradiation dose rate is 6.602Rad / s, and the irradiation time is 211s. The measurement results of the depth dose distribution of the proton beam in the second wedge-shaped phantom are obtained, and the simulation calculation results corresponding to the measurement results are obtained by Geant4 software ,Such as Figure 5 shown.

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Abstract

The invention provides a device and a method for measuring depth dose distribution based on a proton irradiation source. The device comprises: a first wedge-shaped die body and a second wedge-shaped die body; a shielding layer, which is arranged on the upper surface of the second wedge-shaped die body and used for receiving proton beams generated by the irradiation source; and a first developing film dosimeter, which is arranged between the first wedge-shaped die body and the second wedge-shaped die body and is used for receiving the proton beams passing through the second wedge-shaped die body. According to the invention, the first developing film dosimeter arranged between the first wedge-shaped die body and the second wedge-shaped die body can acquire the depth dose distribution of theproton beams in the second wedge-shaped die body in one irradiation, the measurement result is accurate, the measurement method is simple, and the measurement cost is low; the second wedge-shaped diebody is made of a polyethylene material and can be equivalent to proton deposition energy and particle energy spectrum information at different depths in human tissue, and research results have a goodguiding effect on astronaut radiation shielding, aerospace electronic component radiation damage and radiation effect tests.

Description

technical field [0001] The invention relates to the technical field of space radiation dose and radiation protection, in particular to a measuring device and method based on the depth dose distribution of a proton irradiation source. Background technique [0002] There is a space radiation environment dominated by protons, heavy ions, and electrons in the universe. Under the radiation effect of spacecraft operating in space, the performance of electronic components in them will decline, change or even fail, which seriously threatens the safety of spacecraft in orbit. Safe operation and safety of astronauts' lives. According to the statistics of AEROSPACE Corporation in the United States, the space environment causes about 40% of spacecraft failures, ranking first among various failure causes. Part of the high-energy heavy ions and protons in the space radiation environment are blocked by the spacecraft shell material, and the ray energy is deposited in the shell protective ...

Claims

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Application Information

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IPC IPC(8): G01T1/02
CPCG01T1/02Y02E30/30
Inventor 吴正新孙慧斌何承发赵海歌胡世鹏钟健甘林罗奇郝昕
Owner SHENZHEN UNIV
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