Performance of a high current H{sup {minus}} radio frequency volume ion source

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1146705· OSTI ID:279258

Saadatmand, K; Arbique, G; Hebert, J; Valicenti, R ^[1]; Leung, K N ^[2]

---

1. Superconducting Super Collider Laboratory, 2550 Beckleymeade Avenue, Dallas, Texas 75237-3946 (United States)
2. 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--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 67; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CESIUM
HIGH-FREQUENCY DISCHARGES
HYDROGEN 1 MINUS BEAMS
ION SOURCES
KEV RANGE 10-100
MILLI AMP BEAM CURRENTS
SUPERCONDUCTING SUPER COLLIDER