Surface Plasma Source Electrode Activation by Surface Impurities

Conference · Sat Jan 01 00:00:00 EST 2011

OSTI ID:1026747

Dudnikov, Vadim ^[1]; Han, Baoxi ^[2]; Johnson, Rolland P ^[1]; Murray, Jr, S N ^[2]; Pennisi, Terry R ^[2]; Santana, Manuel ^[2]; Stockli, Martin P ^[2]; Welton, Robert F ^[2]

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1. Muons, Inc.
2. ORNL

In experiments with RF saddle antenna surface plasma sources (SPS), the efficiency of H- ion generation was increased by up to a factor of 5 by long time plasma electrode activation, without adding Cs from Cs supply, by heating the collar to high temperature using hot air flow and plasma discharge. Without cracking or heating the cesium ampoule, but likely with Cs recovery from impurities, the achieved energy efficiency was comparable to that of conventionally cesiated SNS RF sources with an external or internal Cs supply. In the experiments, perfect cesiation was produced (without additional Cs supply) by the collection and trapping of traces of remnant cesium compounds from SPS surfaces.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1026747
• Resource Relation: Conference: 2nd International Symposium on Negative Ions, Beams and Sources, Takayama, Japan, 20101115, 20101119
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AIR FLOW
ANIONS
ANTENNAS
AVAILABILITY
CESIUM
CESIUM COMPOUNDS
EFFICIENCY
ELECTRODES
ENERGY EFFICIENCY
HEATING
IMPURITIES
PLASMA
TRAPPING
Cesium
H- ions
ion source
RF ion source
multicusp ion source
helicon source