Measurement of ionization and recombination rates for FeXVI--Fe XXII from time-resolved spectroscopy of tokamak plasmas

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.4761· OSTI ID:6739303

Wang, J; Griem, H R; Hess, R; Rowan, W L

The effective ionization and recombination rate coefficients for FeXVI--Fe XXII were obtained by studying the modulation of line emissions by sawtooth oscillations in the TEXT tokamak. Experimental data are matched with the simulation of iron ion emission by a one-dimensional code. The rate coefficients were determined for T/sub e/approx.350--900 eV and N/sub e/approx.(4--5.6) x 10/sup 13/ cm/sup -3/. The rate coefficients for Fe XVI, XVII, and XVIII have large uncertainty partly due to uncertainty of the temperature profile at large radii of the plasma and partly due to other possible atomic processes. The error of ionization rates for Fe XIX--Fe XXII is estimated to be less than 40%, while the estimated accuracy of the recombination rates is better than a factor of 2.

• Research Organization: Laboratory for Plasma and Fusion Energy Studies, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6739303
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:9; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103 -- Fusion Energy-- Plasma Research-- Kinetics
74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CLOSED PLASMA DEVICES
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
EMISSION SPECTRA
ION COLLISIONS
IONIZATION
IONS
IRON IONS
MULTICHARGED IONS
NONDESTRUCTIVE ANALYSIS
RECOMBINATION
SPECTRA
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSITION AMPLITUDES
X-RAY EMISSION ANALYSIS