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Negative ion production near a divertor plate
2007
Journal of Nuclear Materials
In detached divertor operation, typical plasma parameters in front of target plates are densities from 10 19 m -3 up to 10 20 m -3 and temperatures below 3 eV. In this regime, production of negative hydrogen ions can occur, mainly through vibrational excited molecule or by negative surface ionization of hydrogen ions. To study this effect, we have developed a 1D-3V Particle-in-Cell electrostatic model of the electro-negative sheath. The motion of charged particles (e, H + , H 2 + and H -) in
doi:10.1016/j.jnucmat.2007.01.039
fatcat:ljczrw7zvbdqnh2es5bsezbjou