Secondary electron time detector for mass measurements at CSRe  

作　　者：涂小林 王猛 胡正国 徐瑚珊 郭忠言 毛瑞士 肖国青 张宏斌 臧永东 岳珂 

机构地区：[1]Institute of Modern Physics, Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences

出　　处：《Chinese Physics C》2010年第3期363-367,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10635080, 10221003);State Key Development Program of BasicsResearch of China (2007CB815000);Knowledge Innovation Project of Chinese Academy of Sciences (CXTD-J2005-1, KJCX2-SWN18)

摘　　要：The Isochronous Mass Spectrometry is a high accurate mass spectrometer. A secondary electrons time detector has been developed and used for mass measurements. Secondary electrons from a thin carbon foil are accelerated by an electric field and deflected 180°by a magnetic field onto a micro-channel plate. The time detector has been tested with alpha particles and a time resolution of 197 ps （FWHM） was obtained in the laboratory. A mass resolution around 8×10^-6 for Am/m was achieved by using this time detector in a pilot mass measurement experiment.The Isochronous Mass Spectrometry is a high accurate mass spectrometer. A secondary electrons time detector has been developed and used for mass measurements. Secondary electrons from a thin carbon foil are accelerated by an electric field and deflected 180°by a magnetic field onto a micro-channel plate. The time detector has been tested with alpha particles and a time resolution of 197 ps （FWHM） was obtained in the laboratory. A mass resolution around 8×10^-6 for Am/m was achieved by using this time detector in a pilot mass measurement experiment.

关 键 词：isochronous mass spectrometry time of flight CSRe 

分 类 号：O572.212[理学—粒子物理与原子核物理]