Improving efficiency of negative ion production in ion source with saddle antenna

V. Dudnikov; R. P. Johnson; S. Murrey; T. Pinnisi; C. Piller; M. Santana; M. Stockli; R. Welton; C. Johnson; M. Turvey

doi:10.1063/1.4833021

Improving efficiency of negative ion production in ion source with saddle antenna

V. Dudnikov, R. P. Johnson, S. Murrey, T. Pinnisi, C. Piller, M. Santana, M. Stockli, R. Welton, C. Johnson, M. Turvey

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Extraction of negative ions from a saddle antenna radio-frequency surface plasma source is considered. Several versions of new plasma generators with different antennas and magnetic field configurations were tested in the smal Oak Ridge National Laboratory Spallation Neutron Source Test Stand. The efficiency of positive ion generation in plasma has been improved to 200 mA/cm² kW from 2.5 mA/cm² kW. A small oven was developed for cesiation by cesium compounds and alloy decomposition. After cesiation, a current of negative ions to the collector was increased from 1 mA to 10 mA with 1.5 kW RF power in the plasma and longitudinal magnetic field B_l ∼ 250 G. The specific efficiency of H^- production was increased to 20 mA/cm² kW from 2.5 mA/cm² kW.

Original language	English
Article number	02B111
Journal	Review of Scientific Instruments
Volume	85
Issue number	2
DOIs	https://doi.org/10.1063/1.4833021
State	Published - Feb 1 2014

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title = "Improving efficiency of negative ion production in ion source with saddle antenna",

abstract = "Extraction of negative ions from a saddle antenna radio-frequency surface plasma source is considered. Several versions of new plasma generators with different antennas and magnetic field configurations were tested in the smal Oak Ridge National Laboratory Spallation Neutron Source Test Stand. The efficiency of positive ion generation in plasma has been improved to 200 mA/cm2 kW from 2.5 mA/cm2 kW. A small oven was developed for cesiation by cesium compounds and alloy decomposition. After cesiation, a current of negative ions to the collector was increased from 1 mA to 10 mA with 1.5 kW RF power in the plasma and longitudinal magnetic field Bl ∼ 250 G. The specific efficiency of H- production was increased to 20 mA/cm2 kW from 2.5 mA/cm2 kW.",

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AU - Dudnikov, V.

AU - Johnson, R. P.

AU - Murrey, S.

AU - Pinnisi, T.

AU - Piller, C.

AU - Santana, M.

AU - Stockli, M.

AU - Welton, R.

AU - Johnson, C.

AU - Turvey, M.

PY - 2014/2/1

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N2 - Extraction of negative ions from a saddle antenna radio-frequency surface plasma source is considered. Several versions of new plasma generators with different antennas and magnetic field configurations were tested in the smal Oak Ridge National Laboratory Spallation Neutron Source Test Stand. The efficiency of positive ion generation in plasma has been improved to 200 mA/cm2 kW from 2.5 mA/cm2 kW. A small oven was developed for cesiation by cesium compounds and alloy decomposition. After cesiation, a current of negative ions to the collector was increased from 1 mA to 10 mA with 1.5 kW RF power in the plasma and longitudinal magnetic field Bl ∼ 250 G. The specific efficiency of H- production was increased to 20 mA/cm2 kW from 2.5 mA/cm2 kW.

AB - Extraction of negative ions from a saddle antenna radio-frequency surface plasma source is considered. Several versions of new plasma generators with different antennas and magnetic field configurations were tested in the smal Oak Ridge National Laboratory Spallation Neutron Source Test Stand. The efficiency of positive ion generation in plasma has been improved to 200 mA/cm2 kW from 2.5 mA/cm2 kW. A small oven was developed for cesiation by cesium compounds and alloy decomposition. After cesiation, a current of negative ions to the collector was increased from 1 mA to 10 mA with 1.5 kW RF power in the plasma and longitudinal magnetic field Bl ∼ 250 G. The specific efficiency of H- production was increased to 20 mA/cm2 kW from 2.5 mA/cm2 kW.

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Improving efficiency of negative ion production in ion source with saddle antenna

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