Secondary electron time detector for mass measurements at CSRe

• Published in: Chinese physics C Vol. 34; no. 3; pp. 363 - 367
• Main Author: 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
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.03.2010; Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China Graduate University of Chinese Academy of Sciences,Beijing 100049,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China
• Subjects: 偏转磁场; 微通道板; 时间分辨率; 测量时间; 电场加速; 电子探测器; 电子铝箔; 质量测量; time of flight; CSRe; isochronous mass spectrometry
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/34/3/011

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.