Secondary electron time detector for mass measurements at CSRe

TU Xiao-Lin; WANG Meng; HU Zheng-Guo; XU Hu-Shan; GUO Zhong-Yan; MAO Rui-Shi; XIAO Guo-Qing; ZHANG Hong-Bin; ZANG Yong-Dong; YUE Ke

doi:10.1088/1674-1137/34/3/011

Chinese Physics C> 2010, Vol. 34> Issue(3) : 363-367 DOI: 10.1088/1674-1137/34/3/011

Secondary electron time detector for mass measurements at CSRe

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Abstract：
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 Δm/m was achieved by using this time detector in a pilot mass measurement experiment.

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TU Xiao-Lin, WANG Meng, HU Zheng-Guo, XU Hu-Shan, GUO Zhong-Yan, MAO Rui-Shi, XIAO Guo-Qing, ZHANG Hong-Bin, ZANG Yong-Dong and YUE Ke. Secondary electron time detector for mass measurements at CSRe[J]. Chinese Physics C, 2010, 34(3): 363-367. doi: 10.1088/1674-1137/34/3/011

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Received: 2009-05-05
Revised: 2009-08-31

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沈阳化工大学材料科学与工程学院沈阳 110142

Secondary electron time detector for mass measurements at CSRe

Corresponding author: TU Xiao-Lin,

Received Date: 2009-05-05
Accepted Date: 2009-08-31
Available Online: 2010-03-05

Abstract:

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 Δm/m was achieved by using this time detector in a pilot mass measurement experiment.