Argon density measurements from charge{endash}exchange spectroscopy

Journal Article · Thu Oct 01 04:00:00 EDT 1998 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872979· OSTI ID:658488

Whyte, D G ^[1]; Isler, R C; Wade, M R; Schultz, D R; Krstic, P S ^[2]; Hung, C C ^[3]; West, W P ^[4]

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1. University of California at San Diego, San Diego, California 92093 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. Alabama AM University, Normal, Alabama 35762 (United States)
4. General Atomics, San Diego, California 92186-5068 (United States)

Charge{endash}exchange spectroscopy is widely used to determine the profiles of fully stripped low-{ital Z} ions (carbon, oxygen, neon) in fusion plasmas. Continuing interest in the use of heavier impurities for radiative cooling in boundaries and divertors of fusion plasmas has encouraged the expansion of this technique for elements such as argon which are not completely burned out in present machines. As a first step, it has been necessary to predict the wavelengths of transitions from Ar XVI to Ar XVIII from theoretical calculations. Several of these have been detected in the DIII-D tokamak [{ital Plasma Physics Controlled Nuclear Fusion Research}, 1986 (International Atomic Energy Agency, Vienna, 1987), Vol. I, p. 159] subsequent to argon puffing into neutral-beam injected plasmas, and the experimentally determined wavelengths are in good agreement with the predicted values. Argon ion densities have been determined using recent Classical Trajectory Monte Carlo (CTMC) computations of the charge{endash}exchange cross sections, and some radial profiles for specific ionization stages have been measured. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 658488
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 5; ISSN 1070-664X; ISSN PHPAEN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
ARGON IONS
CARBON
CHARGE EXCHANGE
IONIZATION
MONTE CARLO METHOD
NEON
OXYGEN
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
TOKAMAK DEVICES