ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The volume H− ion source under development at Brookhaven is unique in that it has a toroidal plasma region, which feeds ions into the central extraction region through a conically shaped filter field. In pulsed operation, it produces 25 mA of H− in a 1 cm2 aperture, with an electron-to-H− ratio of ≈3. At 19 mA, a normalized, 90% emittance of 0.44 π mm mrad has been measured. Up to 50 mA has been extracted through a 1.87 cm2 aperture. Although not designed for steady state operation, up to 6 mA has been extracted dc. The addition of xenon to the discharge was found to improve the source output by 20%–70%. The circular magnetic cusp field geometry was found to be more favorable than radial cusp fields.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1142833
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