Experimental evidence of charge exchange recombination of highly ionized iron and titanium in Princeton Large Torus

Technical Report · Fri Feb 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5702329· OSTI ID:5702329

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

The observed behavior of the emissivitives of boron-like FeXXIII, lithium-like FeXXIV and TiXX, and the helium-like FeXXV ions in the PLT tokamak during highpower 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 of the lithium-like annd boron-like 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 Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: EY-76-C-02-3073
• OSTI ID: 5702329
• Report Number(s): PPPL-1636
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700104* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Experimental-- (-1987)
ATOMIC IONS
BEAM INJECTION
CHARGE EXCHANGE
CHARGED PARTICLES
EMISSION SPECTRA
IMPURITIES
IONS
IRON IONS
NEUTRAL ATOM BEAM INJECTION
PLT DEVICES
RECOMBINATION
SPECTRA
THERMONUCLEAR REACTORS
TITANIUM IONS
TOKAMAK TYPE REACTORS