@inproceedings{572e5c9fdb884b11ad7ccdd201e39d2e,
title = "A negative hydrogen-ion source for SNS using a helicon plasma generator",
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.",
author = "Goulding, {R. H.} and Welton, {R. F.} and Baity, {F. W.} and Crisp, {D. W.} and A. Fadnek and Y. Kang and Murray, {S. N.} and Sparks, {D. O.} and Stockli, {M. P.}",
year = "2007",
doi = "10.1063/1.2800540",
language = "English",
isbn = "0735404445",
series = "AIP Conference Proceedings",
pages = "493--496",
booktitle = "RADIO FREQUENCY POWER IN PLASMAS",
note = "17th Topical Conference on Radio Frequency Power in Plasmas ; Conference date: 07-05-2007 Through 09-05-2007",
}