APD detector electronics for the NSTX Thomson scattering system

D. W. Johnson; B. P. LeBlanc; D. L. Long; G. Renda

doi:10.1063/1.1321751

APD detector electronics for the NSTX Thomson scattering system

D. W. Johnson, B. P. LeBlanc, D. L. Long, G. Renda

PPPL NSTX

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19 Scopus citations

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 ∼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.

Original language	English (US)
Pages (from-to)	1129-1132
Number of pages	4
Journal	Review of Scientific Instruments
Volume	72
Issue number	1 II
DOIs	https://doi.org/10.1063/1.1321751
State	Published - Jan 2001

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.1321751

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AU - Long, D. L.

AU - Renda, G.

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APD detector electronics for the NSTX Thomson scattering system

Abstract

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