Charge exchange as a recombination mechanism in high-temperature plasmas Hulse, R A; Post, D E; Mikkelsen, D R [Princeton Univ., NJ (USA). Plasma Physics Lab.] 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HOT PLASMA; CHARGE EXCHANGE; BEAM INJECTION HEATING; ELECTRON DENSITY; ELECTRON TEMPERATURE; EQUILIBRIUM PLASMA; HYDROGEN; IMPURITIES; ION-ATOM COLLISIONS; IONIZATION; IRON IONS; MULTICHARGED IONS; NEUTRAL ATOM BEAM INJECTION; PLT DEVICES; RADIATIVE COOLING; RECOMBINATION; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; ATOM COLLISIONS; BEAM INJECTION; CHARGED PARTICLES; COLLISIONS; COOLING; ELEMENTS; HEATING; ION COLLISIONS; IONS; NONMETALS; PLASMA; PLASMA HEATING; THERMONUCLEAR REACTORS; TOKAMAK TYPE REACTORS; 700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987) Charge exchange with neutral hydrogen is examined as a recombination mechanism for multicharged impurity ions present in high-temperature fusion plasmas. At sufficiently low electron densities, fluxes of atomic hydrogen produced by either the injection of neutral heating beams or the background of 'thermal' neutrals can yield an important or even dominant recombination process for such ions. Equilibrium results are given for selected impurity elements showing the altered ionisation balance and radiative cooling rate produced by the presence of various neutral populations. A notable result is that the stripping of impurities to relatively non-radiative ionisation states with increasing electron temperature can be postponed or entirely prevented by the application of intense neutral beam heating power. A time-dependent calculation modelling the behaviour of iron in recent PLT tokamak high-power neutral beam heating experiments is also presented. United Kingdom 1980-10-14 English Journal Article Journal Name: J. Phys., B (London); (United Kingdom); Journal Volume: 13:19 Medium: X; Size: Pages: 3895-3907 https://doi.org/ [] 13:19 Journal ID: CODEN: JPAMA INIS; AIX-12-579787; EDB-81-024795 2010-12-30 6712507