A 130 point Nd:YAG Thomson scattering diagnostic on MAST

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

DOI:https://doi.org/10.1063/1.3460628· OSTI ID:22058670

Scannell, R; Walsh, M J; Dunstan, M R; Figueiredo, J; Naylor, G; O'Gorman, T; Shibaev, S ^[1]; Gibson, K J; Wilson, H ^[2]

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1. EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxon OX14 3DB (United Kingdom)
2. Department of Physics, University of York, Heslington, York YO10 5DD (United Kingdom)

A Thomson scattering diagnostic designed to measure both edge and core physics has been implemented on MAST. The system uses eight Nd:YAG lasers, each with a repetition rate of 30 Hz. The relative and absolute timing of the lasers may be set arbitrarily to produce fast bursts of measurements to suit the time evolution of the physics being studied. The scattered light is collected at F/6 by a 100 kg six element lens system with an aperture stop of 290 mm. The collected light is then transferred to 130 polychromators by 130 independent fiber bundles. The data acquisition and processing are based on a distributed computer system of dual core processors embedded in 26 chassis. Each chassis is standalone and performs data acquisition and processing for five polychromators. This system allows data to be available quickly after the MAST shot and has potential for real-time operations.

• OSTI ID: 22058670
• 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

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COMPUTERS
DATA ACQUISITION
DATA PROCESSING
LENSES
MAST TOKAMAK
NEODYMIUM LASERS
REAL TIME SYSTEMS
THOMSON SCATTERING
VISIBLE RADIATION