A negative hydrogen-ion source for SNS using a helicon plasma generator

R. H. Goulding, R. F. Welton, F. W. Baity, D. W. Crisp, A. Fadnek, Y. Kang, S. N. Murray, D. O. Sparks, M. P. Stockli

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a world-class facility for materials research based on neutron scattering. It consists of a negative hydrogen (H-) ion source, linear accelerator, proton accumulator ring, and liquid Hg target. A power upgrade is planned for the device, which will require significant improvements in the negative ion source, including the production of H-beam currents of 70-95 mA (∼2× thepresentSNS source value), with a pulse length of 1 ms and duty factor of ∼7%. No H-sources currently in existence meet these combined requirements. A proof-of-principle experiment is being constructed in which the rf inductive plasma generator in the present source is replaced by a helicon plasma generator. This is expected to produce a factor of three or better increase in the maximum source plasma density at a reduced rf power level, resulting in significantly increased negative ion current with reduced heat removal requirements.

Original languageEnglish
Title of host publicationRADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication17th Topical Conference on Radio Frequency Power in Plasmas
Pages493-496
Number of pages4
DOIs
StatePublished - 2007
Event17th Topical Conference on Radio Frequency Power in Plasmas - Clearwater, FL, United States
Duration: May 7 2007May 9 2007

Publication series

NameAIP Conference Proceedings
Volume933
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference17th Topical Conference on Radio Frequency Power in Plasmas
Country/TerritoryUnited States
CityClearwater, FL
Period05/7/0705/9/07

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