title: The status of the SNS external antenna ion source and spare RFQ test facility.
abstract: The Oak Ridge National Laboratory operates the Spallation Neutron Source, consisting of a H(-) ion source, a 1 GeV linac and an accumulator ring. The accumulated <1 μs-long, ∼35 A beam pulses are extracted from the ring at 60 Hz and directed onto a liquid Hg target. Spalled neutrons are directed to ∼20 world class instruments. Currently, the facility operates routinely with ∼1.2 MW of average beam power, which soon will be raised to 1.4 MW. A future upgrade with a second target station calls for raising the power to 2.8 MW. This paper describes the status of two accelerator components expected to play important roles in achieving these goals: a recently acquired RFQ accelerator and the external antenna ion source. Currently, the RFQ is being conditioned in a newly constructed 2.5 MeV Integrated Test Facility (ITF) and the external antenna source is also being tested on a separate test stand. This paper presents the results of experiments and the testing of these systems.
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: R F
authors.initials: RF
authors.lastname: Welton
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: A V
authors.initials: AV
authors.lastname: Aleksandrov
authors.affiliation: Muons, Inc., 552 N. Batavia Avenue, Batavia, Illinois 60510, USA.
authors.forename: V G
authors.initials: VG
authors.lastname: Dudnikov
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: B X
authors.initials: BX
authors.lastname: Han
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Kang
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: S N
authors.initials: SN
authors.lastname: Murray
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Pennisi
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: C
authors.initials: C
authors.lastname: Piller
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: M
authors.initials: M
authors.lastname: Santana
authors.affiliation: Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37830-6471, USA.
authors.forename: M P
authors.initials: MP
authors.lastname: Stockli