Journal of Radiation Research and Radiation Processing, Volume. 43, Issue 1, 010701(2025)
Development of a method for measuring low energy electron beam irradiation parameters by calorimetry and step stacking
Figures & Tables(10)
Fig. 1. Schematic diagram of low energy electron energy measurement
Fig. 3. Dose distribution of CTA film measurement with length, dotted line indicates the background baseline of the film dosimeter, red line indicates the number of Mylar film layers (color online)
Fig. 4. Simulation of energy deposition of electron beam in graphite material (density is 1.77 g/cm3). The generated electrons penetrate the 10 μm titanium window, 5 cm air, and Mylar film for complete energy deposition
Fig. 5. Relationship between absorbed dose and reciprocal of the moving speed (a), and beam intensity (b)
Fig. 6. Comparison of specific heat value of graphite before and after irradiation
Fig. 7. Temperature change curve with time before and after irradiation
Table 1. Electron range for the energy from 100 keV to 300 keV
View tableView in ArticleTable 1. Electron range for the energy from 100 keV to 300 keV
电子束能量 / keV
Electron beam energy
质量阻止本领 / (MeV·cm2·g-1)
Mass stopping power
CSDA射程 / (g·cm-2)
CSDA range
石墨吸收体中射程 / mm
Range in graphite absorber
100 3.68 0.016 0.073 130 3.21 0.023 0.106 150 2.89 0.032 0.143 180 2.66 0.041 0.184 200 2.49 0.050 0.228 250 2.25 0.072 0.325 300 2.09 0.095 0.430
Table 2. Comparison of measurement results between calorimeter and alanine dosimeter under the same condition
View tableView in ArticleTable 2. Comparison of measurement results between calorimeter and alanine dosimeter under the same condition
测量器具
Measuring instrument
吸收剂量 / kGy
Absorbed dose
测量不确定度 / kGy
Uncertainty
量热计装置Calorimeter 18.8 2.07 丙氨酸剂量计Alanine dosimeter 19.2 0.93
Table 3. Uncertainty evaluation of 140 keV electron beam irradiation absorbed dose measurement
View tableView in ArticleTable 3. Uncertainty evaluation of 140 keV electron beam irradiation absorbed dose measurement
不确定度来源
Sources of uncertainty
类型
Type
相对标准不确定度 / %
Relative standard uncertainty
特征比热容
Heat capacity
石墨成分 Graphite composition B 0.10 石墨比热测量 Graphite specific heat measurement B 0.64 温度对比热影响 Effect of temperature on specific heat B 0.37 温升
Temperature rising
电阻特征曲线校准 Thermistor calibration B 0.52 电阻测量 Thermistor measurement B 0.02 热损失修正 Heat loss correction B 4.43 试验装置稳定性 The stability B 1.12 测量重复性 Measurement repeatability A 1.86 合成标准不确定度（uc）Combined standard uncertainty (uc) 5.1 扩展不确定度（U）（k=2）Extended uncertainty (U)(k=2) 11
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Rui LUO, Yuhe ZHANG, Naqing MAO. Development of a method for measuring low energy electron beam irradiation parameters by calorimetry and step stacking[J]. Journal of Radiation Research and Radiation Processing, 2025, 43(1): 010701
Paper Information
Category: RADIATION INTERDISCIPLINARY RESEARCH
Received: May. 21, 2024
Accepted: Jul. 11, 2024
Published Online: Mar. 13, 2025
The Author Email: LUO Rui (luorui@cnncmail.cn)
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