A positron moderator using porous metal  

作　　者：WANGBao-Yi YURun-Sheng ZHAOFa-Ru MAChuang-Xin ZHANGTian-Bao WEILong 

机构地区：[1]InstituteofHighEnergyPhysics,theChineseAcademyofSciences,Beijing100039 [2]TheTechnologicalInnovationCorporationofChina,Beijing100036

出　　处：《Nuclear Science and Techniques》2004年第4期213-215,共3页核技术（英文）

基　　金：Supported by the National Natural Science Foundation of China(No.19927001 and No.10275076)

摘　　要：Two types of porous metal moderators (i.e. porous nickel layer and multi-wire tungsten layer) are proposed and tested on a slow positron beam line. A moderation efficiency of about 2×10-4 has been achieved, which is higher than that for W vane geometry moderator by a factor of 4.Two types of porous metal moderators (i.e. porous nickel layer and multi-wire tungsten layer) are proposed and tested on a slow positron beam line. A moderation efficiency of about 2×10-4 has been achieved, which is higher than that for W vane geometry moderator by a factor of 4.

关 键 词：多孔金属 正电子减速剂 慢正电子束 正电子湮灭技术 高能物理学 

分 类 号：O572.322[理学—粒子物理与原子核物理] O571.33[理学—物理]