Enhanced core charge exchange recombination spectroscopy system on Joint European Torus

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2222170· OSTI ID:20861301

Negus, C R; Giroud, C; Meigs, A G; Zastrow, K -D; Hillis, D L ^[1]

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1. EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom)

Charge exchange spectroscopy is a key diagnostic on the Joint European Torus for radial profiles of ion temperature, toroidal rotation, and impurity densities. This article describes the current status and the improvements made over the last five years. The current system consists of two periscopes looking at one of the two banks of neutral heating beams, {approx_equal}90 optical fibers defining viewing directions, and seven spectrometers with charge-coupled device (CCD) cameras. The upgrade has involved replacement of the two periscopes and windows, a doubling of the number of optical fibers (plasma viewing directions), new cameras for the existing spectrometers, improvements to the throughput and long-term stability of the five existing spectrometers, and the addition of two new high-throughput spectrometers with their CCD cameras from ORNL. This work has culminated in improved spatial resolution, increased sensitivity of all the plasma viewing channels (for some by a factor of {approx}3 or more), and enhanced time resolution from 50 to around 10 ms.

• OSTI ID: 20861301
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 77; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CAMERAS
CHARGE EXCHANGE
CHARGE-COUPLED DEVICES
ELECTRON TEMPERATURE
ION TEMPERATURE
OPTICAL FIBERS
PERISCOPES
PLASMA
PLASMA BEAM INJECTION
PLASMA CONFINEMENT
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA HEATING
PLASMA IMPURITIES
SPATIAL RESOLUTION
SPECTROMETERS
SPECTROSCOPY
TOKAMAK DEVICES