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
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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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