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Ion beam accelerator system

Patent ·
OSTI ID:6451287

A system is described that combines geometrical and electrostatic focusing to provide high ion extraction efficiency and good focusing of an accelerated ion beam. The apparatus includes a pair of curved extraction grids (16,18) with multiple pairs of aligned holes positioned to direct a group of beamlets (20) along converging paths. The extraction grids are closely spaced and maintained at a moderate potential to efficiently extract beamlets of ions and allow them to combine into a single beam (14). An accelerator electrode device (22) downstream from the extraction grids, is at a much lower potential than the grids to accelerate the combined beam.

Assignee:
California Institute of Technology
Patent Number(s):
US 4447773
OSTI ID:
6451287
Country of Publication:
United States
Language:
English

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