DOSIMETRIC EVALUATION OF LASER-DRIVEN X-RAY AND NEUTRON SOURCES UTILIZING XG-III PS LASER WITH PEAK POWER OF 300 TERAWATT

作者：Yang, Bo; Qiu, Rui^*; Jiao, Jinlong; Lu, Wei; Zhang, Zhimeng; Zhou, Weimin; Ma, Chi; Zhang, Hui; Li, Junli

来源：Radiation Protection Dosimetry, 2017, 177(3): 302-309.

DOI：10.1093/rpd/ncx045

• PLASMA
• INTENSITY
• RADIATION

Current short-pulse high-intensity lasers can accelerate electrons and proton/ions to energies of giga-electron volts. For certain advanced applications, laser-accelerated electrons and protons are optimised for high-energy X-ray and neutron generation at the XG-III picosecond (ps) laser beamline. These energetic X-ray and neutron beams can significantly affect radiation safety at the facility; therefore, proper evaluation of the radiological hazards induced by laser-driven X-ray and neutron sources is required. This study presents a dosimetric evaluation of laser-driven X-ray and neutron sources at the XG-III ps laser beamline. The 'source terms' of the laser-accelerated electrons and protons are characterised utilising the particle-in-cell method and an analytical model, respectively. The Monte Carlo code FLUKA is used to calculate prompt and residual dose yields due to all radiation field components and the number of residual activated nuclei. Our results can provide a reference for radiation hazard analysis at short-pulse high-intensity laser facilities worldwide.

• 出版日期2017-12
• 单位中国人民解放军军事医学科学院; 中国工程物理研究院激光聚变研究中心; 中国工程物理研究院; 清华大学; 上海交通大学