An Active Dose Measurement Device for Ultra-short, Ultra-intense Laser Facilities

被引：0
作者：
Wei, Shuoyang [1 ]
Gong, Hui [1 ]
Song, Honghu [1 ]
Hu, Ankang [1 ]
Xiong, Jun [1 ]
Zhang, Hui [1 ]
Li, Junli [1 ]
Qiu, Rui [1 ]
机构：
[1] Tsinghua Univ, Dept Engn Phys, Beijing, Peoples R China
来源：
HEALTH PHYSICS | 2022年 / 122卷 / 06期
基金：
中国国家自然科学基金;
关键词：
detector; radiation; lasers; Monte Carlo; radiation dose; CHARGE-COLLECTION EFFICIENCY; CVD DIAMOND DETECTOR; X-RAY-EMISSION; PLASMA ACCELERATOR; ELECTRON-BEAMS; PERFORMANCE;
D O I：
10.1097/HP.0000000000001560
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Ultra-short, ultra-intense laser facilities could produce ultra-intense pulsed radiation fields. Currently, only passive detectors are fit for dose measurement in this circumstance. Since the laser device could generate a dose up to tens of mSv outside the chamber in tens of picoseconds, resulting in a high instantaneous dose rate of similar to 10(7) Sv s(-1), it is necessary to perform real-time dose measurement to ensure the safety of nearby workers. Due to fast response and excellent radiation resistance, a diamond-based dose measurement device was designed and developed, and its dose-rate response and its feasibility for such occasions were characterized. The measurement results showed that the detector had a good dose-rate linearity in the range of 3.39 mGyh(-1) to 10.58 Gyh(-1) for an x-ray source with energy of 39 keV to 208 keV. No saturation phenomenon was observed, and the experimental results were consistent with the results obtained from Monte Carlo simulation. The charge collection efficiency was about 80%. Experimental measurements and simulations with this dose measurement device were carried out based on the "SG-H" laser device. The experimental and simulation results preliminarily verified the feasibility of using the diamond detector to measure the dose generated by ultrashort, ultra-intense laser devices. The results provided valuable information for the follow-up real-time dose measurement work of ultra-short, ultra-intense laser devices.
引用
收藏
页码：685 / 695
页数：11
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