期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 80, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3258200
关键词
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资金
- CNRS [PICS N-3407]
- KAKENHI [18540399]
- Photon Factory Program Advisory Committee [2006G230, 2008G529]
- Grants-in-Aid for Scientific Research [18540399] Funding Source: KAKEN
A simple asynchronous mechanical light chopper, based on modification of a turbo-molecular pump, has been developed to extend the interval between light pulses in single bunch operation at the Photon Factory storage ring. A pulse repetition rate of 80 kHz was achieved using a cylinder rotating at 48000 rpm, with 100 slits of 80 mu m width. This allows absolute timing of particles up to 12.48 mu s instead of the single-bunch period of 624 ns. We have applied the chopper together with a light pulse monitor to measure multielectron coincidence spectra using a magnetic bottle time-of-flight electron spectrometer. With such a system, the electron energies are determined without any ambiguity, the folding of coincidence spectra disappears and the effect of false coincidences is drastically reduced. (C) 2009 American Institute of Physics. [doi:10.1063/1.3258200]
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