Human radiological safety assessment for petawatt laser-driven ion acceleration experiments in CLAPA-T  

作　　者：Xiaopeng Zhang Jiarui Zhao Shengxuan Xu Xun Chen Ying Gao Shiyou Chen Kun Zhu Xueqing Yan Wenjun Ma 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,and Key Laboratory of HEDP of the Ministry of Education,CAPT,Peking University,Beijing 100871,China [2]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,CAS,Beijing 100049,China [3]Beijing Laser Acceleration Innovation Center,Huairou,Beijing 101400,China [4]Institute of Guangdong Laser Plasma Technology,Baiyun,Guangzhou 510540,China

出　　处：《Matter and Radiation at Extremes》2024年第4期8-15,共8页极端条件下的物质与辐射（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.12205008);the NSFC Innovation Group Project(Grant No.11921006);the National Grand Instrument Project(Grant Nos.2019YFF01014402 and 2019YFF01014403);the National Science Fund for Distinguished Young Scholars(Grant No.12225501).

摘　　要：The newly built Compact Laser Plasma Accelerator-Therapy facility at Peking University will deliver 60 J/1 Hz laser pulses with 30 fs duration.Driven by this petawatt laser facility,proton beams with energy up to 200 MeV are expected to be generated for tumor therapy.During high-repetition operation,both prompt radiation and residual radiation may cause safety problems.Therefore,human radiological safety assessment before commissioning is essential.In this paper,we simulate both prompt and residual radiation using the Geant4 and FLUKA Monte Carlo codes with reasonable proton and as-produced electron beam parameters.We find that the prompt radiation can be shielded well by the concrete wall of the experimental hall,but the risk from residual radiation is nonnegligible and necessitates adequate radiation cooling.On the basis of the simulation results,we discuss the constraints imposed by radiation safety considerations on the annual working time,and we propose radiation cooling strategies for different shooting modes.

关 键 词：laser PROMPT ACCELERATION 

分 类 号：TN24[电子电信—物理电子学]