EXTRACTION OF H- BEAMS FROM A VOLUME PRODUCTION SOURCE
The need for fast electrons to produce vibrationally excited molecules and positive ions is in conflict with the requirement of a low temperature plasma for electron attachment leading to H formation. These two requirements can be satisfied in a source which is divided into zones by transverse magnetic fields confining the fast ionizing electrons but allowing the slow electrons to diffuse through by coulomb collisions. This tandem source concept has been examined in simple format where H fluxes have been observed. In this paper a magnetic multipole plasma generator is described from which a single beamlet of H is extracted and accelerated to 20 keV. An electron separator is also described which allows the electron flux to be measured independently of the H beam. Several different transverse field arrangements of filter have been examined and the relative fluxes of H and electrons measured as a function of the discharge parameters.
Bibliographic Reference: 4TH INTERNATIONAL CONFERENCE ON ION AND PLASMA ASSISTED TECHNIQUES, KYOTO (JAPAN), SEPT. 12-16, 1983 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31940 ORA
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Record Number: 1989124027500 / Last updated on: 1987-01-01
Available languages: en