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Author Johnson, D. W. ♦ LeBlanc, B. P. ♦ Long, D. L. ♦ Renda, G.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CALIBRATION ♦ DESIGN ♦ FLEXIBILITY ♦ PHOTODIODES ♦ PHYSICS ♦ PLASMA ♦ SENSITIVITY ♦ THOMSON SCATTERING
Abstract An electronics system has been installed and tested for the readout of avalanche photodiode (APD) detectors for the National Spherical Torus Experiment (NSTX) Thomson scattering system. Similar to previous designs, it features preamps with a fast and a slow output. The fast output uses pulse shaping to optimize sensitivity for the 8 ns scattered light pulse while rejecting noise in the intrinsic plasma background. A low readout noise of {approx}25 photoelectrons is achieved at an APD gain of 75. The design incorporates a number of features to provide flexibility for various modes of calibration.
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-01-01
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 72
Issue Number 1


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