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Generation and transport of a low energy intense ion beam

Authors :
A. V. Petrov
A. VanDrie
Ivan Isakov
Vit. M. Bystritskii
M. Anderson
N. M. Polkovnikova
Sean Dettrick
N. Rostoker
Y. Song
A. Shlapakovsky
Michl Binderbauer
V. Matvienko
E. Garate
J. K. Walters
Artan Qerushi
Source :
Journal of Applied Physics. 96:1249-1256
Publication Year :
2004
Publisher :
AIP Publishing, 2004.

Abstract

The paper describes experiments on the generation and transport of a low energy (70–120 keV), high intensity (10–30 A/cm2) microsecond duration H+ ion beam (IB) in vacuum and plasma. The IB was generated in a magnetically insulated diode (MID) with an applied radial B field and an active hydrogen-puff ion source. The annular IB, with an initial density of ji∼10–20 A/cm2 at the anode surface, was ballistically focused to a current density in the focal plane of 50–80 A/cm2. The postcathode collimation and transport of the converging IB were provided by the combination of a “concave” toroidal magnetic lens followed by a straight transport solenoid section. With optimized MID parameters and magnetic fields in the lens/solenoid system, the overall efficiency of IB transport at the exit of the solenoid 1 m from the anode was ∼ 50% with an IB current density of 20 A/cm2. Two-dimensional computer simulations of post-MID IB transport supported the optimization of system parameters.

Details

ISSN :
10897550 and 00218979
Volume :
96
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........ac189037ed39457b546a9dbe02bf3f40