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EBT3-based solar ultraviolet dosimeter
Radiation Effects and Defects in Solids ( IF 1 ) Pub Date : 2020-06-04 , DOI: 10.1080/10420150.2020.1774881
Wan Insaniah Saleha Ahmad Shah 1 , Ahmad Fairuz Omar 1
Affiliation  

This paper presents the development of a 10-bit Gafchromic external beam therapy 3 (EBT3)-based solar ultraviolet (UV) dosimeter that comprised only a single red light-emitting diode (LED) with a peak emission wavelength at 635 nm as the illumination light source and a photodiode as the detector. The color changes of EBT3 film have been previously proven to have a good relationship with solar UV exposure (in mJ/cm2). The newly developed dosimeter determines the solar UV dose by quantifying the discoloration of EBT3 film. In this experiment, the maximum accumulative dose by EBT3 film was recorded at 32,802 mJ/cm2. Segmentation technique was introduced on the nonlinear relationship between UV dose and the color changes of the films, which was represented by the output of the photodetector. Algorithm developed based on three segments produced the best calibration accuracy and was installed in the microcontroller prior to the measurement of the films. The calibration result produced by the EBT3 UV dosimeter managed to generate high coefficient of determination, R 2 = 0.9954 with root mean square error (RMSEC) of 657 mJ/cm2. The dosimeter also managed to produce high prediction accuracy with R 2 = 0.9963 and RMSEP = 471 mJ/cm2. The reproducibility results conducted based on 154 tests, on the other hand, produces R 2 = 0.9962 with RMSE 566 mJ/cm2.

中文翻译:

基于EBT3的太阳紫外线剂量计

本文介绍了基于 10 位 Gafchromic 外部光束疗法 3 (EBT3) 的太阳紫外线 (UV) 剂量计的开发,该剂量计仅包含一个峰值发射波长为 635 nm 作为照明的红色发光二极管 (LED)光源和光电二极管作为检测器。EBT3 薄膜的颜色变化先前已被证明与太阳紫外线照射(mJ/cm2)有很好的关系。新开发的剂量计通过量化 EBT3 薄膜的变色来确定太阳紫外线剂量。在该实验中,EBT3 胶片的最大累积剂量记录为 32,802 mJ/cm2。在紫外剂量与薄膜颜色变化之间的非线性关系上引入了分割技术,该关系由光电探测器的输出表示。基于三段开发的算法产生了最佳的校准精度,并在测量薄膜之前安装在微控制器中。EBT3 紫外线剂量计产生的校准结果设法产生高决定系数,R 2 = 0.9954,均方根误差 (RMSEC) 为 657 mJ/cm2。剂量计还设法产生高预测精度,R 2 = 0.9963 和 RMSEP = 471 mJ/cm2。另一方面,基于 154 次测试的再现性结果产生 R 2 = 0.9962,RMSE 为 566 mJ/cm2。剂量计还设法产生高预测精度,R 2 = 0.9963 和 RMSEP = 471 mJ/cm2。另一方面,基于 154 次测试的再现性结果产生 R 2 = 0.9962,RMSE 为 566 mJ/cm2。剂量计还设法产生高预测精度,R 2 = 0.9963 和 RMSEP = 471 mJ/cm2。另一方面,基于 154 次测试的再现性结果产生 R 2 = 0.9962,RMSE 为 566 mJ/cm2。
更新日期:2020-06-04
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