Experimental evidence of charge-exchange recombination of highly ionized iron and titanium in Princeton large torus

Journal Article · Fri Aug 01 00:00:00 EDT 1980 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.22.725· OSTI ID:5236807

Suckewer, S; Hinnov, E; Bitter, M; Hulse, R; Post, D

The observed behavior of the emissivitives of boronlike Fe XXII, lithiumlike Fe XXIV and Ti XX, and the heliumlike Fe XXV ions in the Princeton large torus tokamak during high-power neutral (H/sup 0/ or D/sup 0/) beam heating is described. A substantial lowering of the dominant ionization state in the center of the discharge, while the electron temperature is rising, is attributed primarily to increased recombination rate of the ions through charge exchange with neutral hydrogen. This interpretation is supported by the different space and time behavior or the lithiumlike and boronlike ions of comparable ionization potentials, and by comparisons of neutral beam heating of the plasma with ion cyclotron resonance heating, which does not appreciably change the neutral hydrogen concentration. The observations are compared with approximate zero-dimensional model calculations, using experimental plasma conditions and estimated charge-exchange rates.

• Research Organization: Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544
• OSTI ID: 5236807
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 22:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ATOMIC IONS
BEAM INJECTION
BEAM INJECTION HEATING
CHARGE EXCHANGE
CHARGED PARTICLES
EMISSION SPECTRA
HEATING
IONS
IRON IONS
MULTICHARGED IONS
NEUTRAL ATOM BEAM INJECTION
PLASMA HEATING
PLT DEVICES
RECOMBINATION
SPECTRA
THERMONUCLEAR REACTORS
TITANIUM IONS
TOKAMAK TYPE REACTORS