Title :
Ion charge state distributions in high current vacuum arc plasmas in a magnetic field
Author :
Oks, Efim M. ; Anders, André ; Brown, Ian G. ; Dickinson, Michael R. ; MacGill, Robert A.
Author_Institution :
Inst. of High-Current Electron., Acad. of Sci., Tomsk, Russia
fDate :
6/1/1996 12:00:00 AM
Abstract :
We have investigated the charge state distributions of metal ions produced in a high current vacuum arc plasma located in a strong magnetic field. The arc current was varied over the range 200 A to 4 kA and the magnetic field was from zero up to 10 kG. In general, the effect of both high arc current and high magnetic field is to push the distribution to higher charge states-the mean ion charge state is increased and new high charge states are formed. These effects are explained in terms of increased power input (higher plasma temperature) and delayed freezing of the charge state distribution during the plasma expansion process
Keywords :
magnetic fields; metals; plasma diagnostics; vacuum arcs; 10 kG; 200 A to 4 kA; arc current; charge state distribution; freezing; high current vacuum arc plasmas; magnetic field; mean ion charge state; metal ion charge state distributions; plasma expansion; plasma temperature; Acceleration; Ion sources; Magnetic field measurement; Magnetic fields; Plasma accelerators; Plasma density; Plasma immersion ion implantation; Plasma sources; Plasma temperature; Vacuum arcs;
Journal_Title :
Plasma Science, IEEE Transactions on
