Atomic data of tungsten for current and future uses in fusion and plasma science

Journal Article · Fri Apr 19 00:00:00 EDT 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4802294· OSTI ID:22117042

Clementson, J.; Beiersdorfer, P. ^[1]; Lennartsson, T. ^[2]

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1. Physics Division, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94551 (United States)
2. Lund Observatory, Lund University, P.O. Box 43, SE-221 00 Lund (Sweden)

Atomic physics has played an important role throughout the history of experimental plasma physics. For example, accurate knowledge of atomic properties has been crucial for understanding the plasma energy balance and for diagnostic development. With the shift in magnetic fusion research toward high-temperature burning plasmas like those expected to be produced in the ITER tokamak, the atomic physics of tungsten has become important. Tungsten will be a constituent of ITER plasmas because of its use as a plasma-facing material able to withstand high heat loads with lower tritium retention than other possible materials. Already, ITER diagnostics are being developed based on using tungsten radiation. In particular, the ITER Core Imaging X-ray Spectrometer (CIXS), which is designed to measure the core ion temperature and bulk plasma motion, is being based on the x-ray emission of neonlike tungsten ions (W{sup 64+}). In addition, tungsten emission will at ITER be measured by extreme ultraviolet (EUV) and optical spectrometers to determine its concentration in the plasma and to assess power loss and tungsten sputtering rates. On present-day tokamaks tungsten measurements are therefore being performed in preparation of ITER. Tungsten has very complex spectra and most are still unknown. The WOLFRAM project at Livermore aims to produce data for tungsten in various spectral bands: Lshell x-ray emission for CIXS development, soft x-ray and EUV M- and N-shell tungsten emission for understanding the edge radiation from ITER plasmas as well as from contemporary tokamaks, and O-shell emission for developing spectral diagnostics of the ITER divertor.

• OSTI ID: 22117042
• Journal Information: AIP Conference Proceedings, Vol. 1525, Issue 1; Conference: 22. international conference on application of accelerators in research and industry, Ft. Worth, TX (United States), 5-10 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
EXTREME ULTRAVIOLET RADIATION
FIRST WALL
HEATING LOAD
ION TEMPERATURE
ITER TOKAMAK
N SHELL
OPTICAL SPECTROMETERS
PHOTON EMISSION
PLASMA DIAGNOSTICS
POWER LOSSES
SOFT X RADIATION
THERMONUCLEAR REACTOR MATERIALS
TRITIUM
TUNGSTEN
TUNGSTEN IONS
ULTRAVIOLET SPECTRA
X-RAY SPECTRA
X-RAY SPECTROMETERS