HIGH-INTENSITY SOURCE OF POLARIZED NEGATIVE HYDROGEN-IONS WITH A RESONANT CHARGE-EXCHANGE PLASMA IONIZER

The Moscow Institute for Nuclear Research atomic-beam type hydrogen io ns is described. The production of H- ions is based on the resonant ch arge exchange of polarized thermal hydrogen atoms and D- ions in deute rium plasma. Improvements in the D- plasma source are outlined. The po larized source produces a pulsed H- beam with a peak current up to 1 m A and a pulse duration of 180 mu s at a repetition rate of 10 Hz. The normalized emittance for 90% of the beam particles is 1.8 pi mm mrad. The polarimeter of low energy H- ions is also described. The polarizat ion of the H- ions was measured to be 0.87+/-0.02. (C) 1996 American I nstitute of Physics.