PAC09 - List of Authors (Tarvainen, O.A.)

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Tarvainen, O.A.

Paper	Title	Page
MO6RFP038	The ORNL Helicon H^- Ion Source	441
	R.F. Welton, J.R. Carmichael, D.W. Crisp, S.C. Forrester, R.H. Goulding, S.N. Murray, D.O. Sparks, M.P. Stockli ORNL, Oak Ridge, Tennessee O.A. Tarvainen LANL, Los Alamos, New Mexico
	Funding: Research sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the U. S. Department of Energy Plasmas produced by helicon wave excitation typically develop higher densities, particularly near the radial plasma core, at lower operating pressures and RF powers than plasmas produced using traditional inductive RF coupling methods. Approximately two years ago we received funding to develop an H^- ion source based on helicon wave coupling. Our approach was to combine an existing high-density, hydrogen helicon plasma generator developed at ORNL for the Variable Specific Impulse Magnetoplasma Rocket (VASIMR) project with the SNS external antenna H^- source. To date we have achieved plasma densities >10¹³ e/cm³ inside the ion source using <10kW of RF power and <5 SCCM of H2 gas flow. This report discusses the first cesiated H^- beam current extraction measurements from the source.

Paper

Title

Page

MO6RFP038

The ORNL Helicon H^- Ion Source

441

R.F. Welton, J.R. Carmichael, D.W. Crisp, S.C. Forrester, R.H. Goulding, S.N. Murray, D.O. Sparks, M.P. Stockli
ORNL, Oak Ridge, Tennessee
O.A. Tarvainen
LANL, Los Alamos, New Mexico

Funding: Research sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the U. S. Department of Energy

Plasmas produced by helicon wave excitation typically develop higher densities, particularly near the radial plasma core, at lower operating pressures and RF powers than plasmas produced using traditional inductive RF coupling methods. Approximately two years ago we received funding to develop an H^- ion source based on helicon wave coupling. Our approach was to combine an existing high-density, hydrogen helicon plasma generator developed at ORNL for the Variable Specific Impulse Magnetoplasma Rocket (VASIMR) project with the SNS external antenna H^- source. To date we have achieved plasma densities >10¹³ e/cm³ inside the ion source using <10kW of RF power and <5 SCCM of H2 gas flow. This report discusses the first cesiated H^- beam current extraction measurements from the source.