APD detector electronics for the NSTX Thomson scattering system

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

Princeton University. Plasma Physics Laboratory.

关键词: Radiation Detectors;    Nstx Device;    70 Plasma Physics And Fusion Technology;    Readout Systems;    Thomson Scattering;   

DOI  :  10.2172/759295
RP-ID  :  PPPL-3480
RP-ID  :  AC02-76CH03073
RP-ID  :  759295

美国|英语

来源: UNT Digital Library

【 摘 要 】

An electronics system has been installed and tested for the readout of APD detectors for the 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 nsec scattered light pulse while rejecting noise in the intrinsic plasma background. A low readout noise of {approximately}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.