Argon density measurements from charge-exchange spectroscopy

D. G. Whyte; R. C. Isler; M. R. Wade; D. R. Schultz; P. S. Krstic; C. C. Hung; W. P. West

doi:10.1063/1.872979

Argon density measurements from charge-exchange spectroscopy

D. G. Whyte, R. C. Isler, M. R. Wade, D. R. Schultz, P. S. Krstic, C. C. Hung, W. P. West

Fusion and Fission Energy and Science Di

Research output: Contribution to journal › Article › peer-review

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Abstract

Charge-exchange spectroscopy is widely used to determine the profiles of fully stripped low-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 [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-exchange cross sections, and some radial profiles for specific ionization stages have been measured.

Original language	English
Pages (from-to)	3694-3699
Number of pages	6
Journal	Physics of Plasmas
Volume	5
Issue number	10
DOIs	https://doi.org/10.1063/1.872979
State	Published - 1998

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10.1063/1.872979

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title = "Argon density measurements from charge-exchange spectroscopy",

abstract = "Charge-exchange spectroscopy is widely used to determine the profiles of fully stripped low-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 [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-exchange cross sections, and some radial profiles for specific ionization stages have been measured.",

author = "Whyte, {D. G.} and Isler, {R. C.} and Wade, {M. R.} and Schultz, {D. R.} and Krstic, {P. S.} and Hung, {C. C.} and West, {W. P.}",

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AU - Whyte, D. G.

AU - Isler, R. C.

AU - Wade, M. R.

AU - Schultz, D. R.

AU - Krstic, P. S.

AU - Hung, C. C.

AU - West, W. P.

PY - 1998

Y1 - 1998

N2 - Charge-exchange spectroscopy is widely used to determine the profiles of fully stripped low-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 [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-exchange cross sections, and some radial profiles for specific ionization stages have been measured.

AB - Charge-exchange spectroscopy is widely used to determine the profiles of fully stripped low-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 [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-exchange cross sections, and some radial profiles for specific ionization stages have been measured.

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Argon density measurements from charge-exchange spectroscopy

Abstract

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