Open AccessH- ion source operational performance and latest development at the Spallation Neutron Source
Author(s) -
Binghong Han,
M. P. Stöckli,
R. F. Welton,
C. Piller,
S. N. Murray,
Terry R Pennisi,
Chris Stinson,
Sang-Ho Kim
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2244/1/012044
Subject(s) - oak ridge national laboratory , neutron source , spallation neutron source , ion source , nuclear engineering , injector , spallation , nuclear physics , materials science , ion beam , neutron , ion , beam (structure) , physics , plasma , engineering , optics , thermodynamics , quantum mechanics
The U.S. Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is the world’s most powerful accelerator-driven pulsed neutron source. An H - injector feeds the accelerator with high current (>50 mA), time structured (1ms, 60 Hz) H - beam. The injector consists of an RF-driven, Cs-enhanced H - ion source and an electrostatic low energy beam transport section. In the recent three run cycles, an H - ion source operated ∼4 months for each run with excellent availability near 99.9%. The presently ongoing run is also on track to finish another ∼4 months run with similar high availability. Lately, we have tested a solid-state RF system for the ion source to replace the existing vacuum-tube type RF amplifier for the sake of improving the ease of operation and maintenance. Progress has also been made on the continued development of an external antenna RF H - ion source with a focus on improvement to its plasma ignition scheme.