A spatially scanning vacuum ultraviolet and visible range spectrometer for spectroscopy of tokamak plasmas in ASDEX-Upgrade
- Max-Planck-Institut fuer Plasmaphysik, EURATOM/IPP Association, D-85748 Garching, Germany (Berlin Division) D-10117 Berlin (Germany)
- Institut fuer Plasmaforschung der Universitaet Stuttgart, D-70569 Stuttgart (Germany)
A spatially scanning, combined vacuum-ultraviolet (VUV) and visible range spectrometer system for the spectroscopy of tokamak plasmas in the ASDEX-Upgrade experiment is described. This system is designed to allow flexible observation of about 2/3 of the boundary plasma using VUV (30--200 nm) and visible range spectrometers viewing along a common line of sight which can be scanned during the plasma discharge by means of a rotatable mirror. From successive spectra recorded using intensified, multichannel photodiode detectors and the recorded position data, spatial profiles of the plasma emission can be reconstructed. Because radiation losses from the boundary plasma can largely be attributed to line emission in the VUV spectral region, this instrument finds application in quantitative studies of radiation loss processes as well as to studies of impurity production and transport. Simultaneous observation in the visible spectral range facilitates an {ital in} {ital situ} absolute calibration of the VUV instrument by means of the ``branching-ratios`` technique. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 165928
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 12 Vol. 66; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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