Performance of a high current H{sup {minus}} radio frequency volume ion source
- Superconducting Super Collider Laboratory, 2550 Beckleymeade Avenue, Dallas, Texas 75237-3946 (United States)
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)
To evaluate the performance of a high current H{sup {minus}} rf-driven volume ion source, the Superconducting Super Collider ion source was modified to accommodate a set of cesium dispensers so that a trace amount of cesium could be introduced into the plasma grid collar. A plasma grid heater element controls the temperature of the cesiated surfaces and the rate of cesium dispensation. With this modification, beam currents in excess of 100 mA and electron to H{sup {minus}} current ratios close to one have been observed. In contrast, the uncesiated source provided 30 mA of H{sup {minus}} beam with an {ital e}/H{sup {minus}} ratio {ge}25. In both cases the source was operated with a 100 {mu}s beam pulse width at a 10 Hz repetition rate, and an extraction voltage of 35 kV. This cesium enhanced source is a strong candidate for use in high current H{sup {minus}} accelerators. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 279258
- Report Number(s):
- CONF-9509125-; ISSN 0034-6748; TRN: 96:018680
- Journal Information:
- Review of Scientific Instruments, Vol. 67, Issue 3; Conference: 6. international conference on ion sources, Whistler (Canada), 10-16 Sep 1995; Other Information: PBD: Mar 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
A high currrent H{sup {minus}} RF volume ion source
Development of the radio frequency driven H{sup {minus}} ion source for the National Spallation Neutron Source