skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A Negative Hydrogen-Ion Source for SNS Using a Helicon Plasma Generator

Abstract

The Spallation Neutron Source (SNS) at Oak Ridge National Labo ratory 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 up grade 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 the present SNS 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 in crease in the maximum source plasma density at a reduced rf power level, resulting in significantly increased negative ion current with reduced heat removal requirements.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1128948
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 17th Topical Conference on Radio Frequency Power in Plasmas, Clearwater, FL, USA, 20070507, 20070509
Country of Publication:
United States
Language:
English

Citation Formats

Goulding, Richard Howell, Welton, Robert F, Baity Jr, F Wallace, Crisp, Danny W, Fadnek, Andy, Kang, Yoon W, Murray Jr, S N, Sparks, Dennis O, and Stockli, Martin P. A Negative Hydrogen-Ion Source for SNS Using a Helicon Plasma Generator. United States: N. p., 2007. Web.
Goulding, Richard Howell, Welton, Robert F, Baity Jr, F Wallace, Crisp, Danny W, Fadnek, Andy, Kang, Yoon W, Murray Jr, S N, Sparks, Dennis O, & Stockli, Martin P. A Negative Hydrogen-Ion Source for SNS Using a Helicon Plasma Generator. United States.
Goulding, Richard Howell, Welton, Robert F, Baity Jr, F Wallace, Crisp, Danny W, Fadnek, Andy, Kang, Yoon W, Murray Jr, S N, Sparks, Dennis O, and Stockli, Martin P. Mon . "A Negative Hydrogen-Ion Source for SNS Using a Helicon Plasma Generator". United States. doi:.
@article{osti_1128948,
title = {A Negative Hydrogen-Ion Source for SNS Using a Helicon Plasma Generator},
author = {Goulding, Richard Howell and Welton, Robert F and Baity Jr, F Wallace and Crisp, Danny W and Fadnek, Andy and Kang, Yoon W and Murray Jr, S N and Sparks, Dennis O and Stockli, Martin P},
abstractNote = {The Spallation Neutron Source (SNS) at Oak Ridge National Labo ratory 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 up grade 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 the present SNS 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 in crease in the maximum source plasma density at a reduced rf power level, resulting in significantly increased negative ion current with reduced heat removal requirements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: