Screener3D:a gaseous time projection chamber for ultra-low radioactive material screening  

作　　者：Hai-Yan Du Cheng-Bo Du Karl Giboni Ke Han Sheng-Ming He Li-Qiang Liu Yue Meng Shao-Bo Wang Tao Zhang Li Zhao Ji-Fang Zhou 

机构地区：[1]INPAC,Shanghai Laboratory for Particle Physics and Cosmology,Key Laboratory for Particle Astrophysics and Cosmology(MOE),School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [2]Yalong River Hydropower Development Company,Ltd.,288 Shuanglin Road,Chengdu 610051,China [3]SJTU-ParisTech Elite Institute of Technology(SPEIT),Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Nuclear Science and Techniques》2021年第12期103-115,共13页核技术（英文）

基　　金：the Ministry of Science and Technology of China(No.2016YFA0400302);the National Natural Sciences Foundation of China(Nos.11775142 and U1965201);the Chinese Academy of Sciences Center for Excellence in Particle Physics(CCEPP).

摘　　要：In experiments searching for rare signals,background events from the detector itself are some of the major factors limiting search sensitivity.Screening for ultra-low radioactive detector materials is becoming ever more essential.We propose to develop a gaseous time projection chamber(TPC)with a Micromegas readout for radio screening.The TPC records three-dimensional trajectories of charged particles emitted from a flat sample placed in the active volume of the detector.The detector can distinguish the origin of an event and identify the particle types with information from trajectories,which significantly increases the screening sensitivity.For a particles from the sample surface,we observe that our proposed detector can reach a sensitivity higher than 100 l Bq m-2 within two days.

关 键 词：Charged-particle detector Surface a measurement Ultra-low radioactivity Material screening 

分 类 号：TL81[核科学技术—核技术及应用]