Title :
Moderate energy metal ion beam focusing by a high-current plasma lens
Author :
Goncharov, A. ; Gubarev, S. ; Dobrovolsko, A. ; Protsenko, I. ; Litovko, I. ; Brown, I.
Author_Institution :
Inst. of Phys. NASU, Kiev, Ukraine
Abstract :
Features of the electrostatic plasma lens (PL) in the regime of focusing of moderate energy (5-25 keV) high-current (up to 800 mA) wide aperture repetitively pulsed metal ion beams are investigated. It is shown that under these conditions, the use of an ohmic divider for fixing the external potentials on the PL electrodes is not effective because significant electron leakage. At the same time, use of the RC divider enables to sustain applied potentials during the time of beam passing. Some static characteristics in the PL volume are investigated. The results of this theoretical analysis are compared with experimental data
Keywords :
dividing circuits; electrodes; electrostatic devices; ion beams; particle beam focusing; plasma devices; 5 to 25 keV; 800 mA; RC divider; beam passing; electron leakage; electrostatic plasma lens; external potentials; high-current plasma lens; moderate energy metal ion beam focusing; ohmic divider; static characteristics; wide aperture; Electrodes; Electron beams; Electron mobility; Hydrogen; Ion beams; Lenses; Magnetic fields; Particle beams; Physics; Plasma properties;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on
Conference_Location :
Eindhoven
Print_ISBN :
0-7803-3953-3
DOI :
10.1109/DEIV.1998.738822
