Multipoint Thomson scattering diagnostic for DIII-D

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139690· OSTI ID:7123676

Hsieh, C L; Chase, R; DeBoo, J C; Evanko, R G; Gohil, P; Snider, R T; Stockdale, R E

The multipoint Thomson scattering diagnostic for DIII-D has been in operation since early 1987. Its capability of measuring electron temperatures as low as 50 eV at densities of a few times 10/sup 12/ cm/sup -3/ and a spatial resolution of 1.4 cm in the plasma edge region has been essential in the study of H-mode plasmas. The major components of the diagnostic system consist of a 10-J ruby laser, many stages of funnel-shaped beam baffles, stacks of razor blades for viewing and stray light dumps, two wide-angle lenses for the collection of scattered light through reentrant window ports with protection shutters, 88 fiber bundles 15 m in length for light transmission to an f/1.9 spectrometer, an intensified CCD camera system capable of single-photon detection, and a VAX computer for hardware control and data processing. The input end of the fiber bundle is made demountable so the view locations can be reconfigured to optimize the spatial resolution for the plasma region of interest.

• Research Organization: General Atomics, San Diego, California 92138
• OSTI ID: 7123676
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 59:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DOUBLET-3 DEVICE
PLASMA DIAGNOSTICS
DATA ACQUISITION SYSTEMS
THOMSON SCATTERING
COMPUTERIZED CONTROL SYSTEMS
DEC COMPUTERS
ELECTRON TEMPERATURE
OPTICAL FIBERS
OPTICAL SPECTROMETERS
CLOSED PLASMA DEVICES
COMPUTERS
CONTROL SYSTEMS
FIBERS
INELASTIC SCATTERING
MEASURING INSTRUMENTS
SCATTERING
SPECTROMETERS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics