The performance of plastic scintillator detector in photon and electron beam

VernacularTitle:塑料闪烁体探测器在光子束和电子束中的性能研究
Author: Meijiao WANG ; Kaining YAO ; Sha LI ; Haizhen YUE ; Zhuolun LIU ; Fan JIANG ; Hao WU ; Ruoxi WANG
From: Chinese Journal of Radiological Medicine and Protection 2021;41(3):205-211
CountryChina
Language:Chinese
Abstract: Objective:To investigate the performance of W2 plastic scintillator in megavolt photon and electron beams.Methods:The photon and electron beam energy provided by linear accelerator was used to collect data of the W2 scintillator. The parameters include the electrometer reading stability, W2 dose and dose rate linearity, and angular response. And the dose uncertainty of the W2 correction factors was also investigated.Results:The standard deviation of the electrometer reading stability was between 0.03 and 0.47. The linear regression factors of W2 dose were all 1.0; the maximum deviation of the dose rates was 0.61%. The Cerenkov light radiation correction factor(CLR) for 6 and 10 MV were 0.741 and 0.746, respectively, and the CLR for 6, 9, 12 and 15 MeV were 0.750, 0.753, 0.757 and 0.757, respectively. The maximum deviation of dose uncertainty for 15 MeV was 3.15%.Conclusions:The signal obtained by the blue and green channel was no angular dependence, the same as the high-energy electron beam, which verified that the Cerenkov radiation correction factor has good linearity. W2 plastic scintillator can be applied to non-coplanar radiotherapy dosimetry.