A multilaser system for a fast sampling Thomson scattering diagnostic

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141808· OSTI ID:6351966

Trost, P K; Carlstrom, T N; DeBoo, J C; Greenfield, C M; Hsieh, C L; Snider, R T ^[1]

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1. General Atomics, San Diego, CA (USA)

A multilaser system is being developed for the DIII-D Thomson scattering diagnostic. This system combines the beams from up to 8 Nd:YAG lasers onto a common beamline in which the beams are nearly parallel and are all focused into a small, common area within the desired scattering volume. Each laser can be fired at a constant rate (20 Hz per laser) for a high average repetition rate, or together in a burst,'' which will give very high sampling rates (10--20 kHz) for short periods. The burst mode will be triggerable by plasma events, which will allow for study of transient phenomena, but will require nonperiodic firing of the lasers. Beamline diagnostics include position sensitive detectors for computer controlled feedback alignment of the 35 m beamline, an image position detection system for monitoring the alignment of the collection lens to the scattering volume, and a 1-D reticon camera for divergence monitoring. The effects of the nonperiodic firing of the lasers will be monitored with the reticon camera.

• OSTI ID: 6351966
• Journal Information: Review of Scientific Instruments; (USA), Vol. 61:10; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DOUBLET-3 DEVICE
ELECTRON DENSITY
ELECTRON TEMPERATURE
PLASMA DIAGNOSTICS
THOMSON SCATTERING
BEAM-PLASMA SYSTEMS
TRANSIENTS
CLOSED PLASMA DEVICES
INELASTIC SCATTERING
SCATTERING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics