Thomson scattering diagnostic upgrade on DIII-D

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3495759· OSTI ID:22055786

Ponce-Marquez, D M; Bray, B D; Deterly, T M; Liu, C ^[1]; Eldon, D ^[2]

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1. General Atomics, P.O. Box 85608, San Diego, California 092186-5608 (United States)
2. University of California-San Diego, La Jolla, California 92093-0417 (United States)

The DIII-D Thomson scattering system has been upgraded. A new data acquisition hardware was installed, adding the capacity for additional spatial channels and longer acquisition times for temperature and density measurements. Detector modules were replaced with faster transimpedance circuitry, increasing the signal-to-noise ratio by a factor of 2. This allows for future expansion to the edge system. A second phase upgrade scheduled for 2010-2011 includes the installation of four 1 J/pulse Nd:YAG lasers at 50 Hz repetition rate. This paper presents the first completed phase of the upgrade and performance comparison between the original system and the upgraded system. The plan for the second phase is also presented.

• OSTI ID: 22055786
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 10; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DATA ACQUISITION
DOUBLET-3 DEVICE
NEODYMIUM LASERS
PERFORMANCE
PLASMA DENSITY
PLASMA DIAGNOSTICS
SIGNAL-TO-NOISE RATIO
TEMPERATURE MEASUREMENT
THOMSON SCATTERING