Christopher Stone
Oak Ridge National Laboratory
7 Papers
4 Citations
Christopher Stone is an academic researcher from Oak Ridge National Laboratory. The author has contributed to research in topics: Spallation Neutron Source & Upgrade. The author has an hindex of 2, co-authored 6 publications.
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Papers
Vacuum System and Modeling for the Materials Plasma Exposure Experiment
Arnold Lumsdaine,Steve Meitner,V.B. Graves,Craig Bradley,Christopher Stone,Timothy Lessard,D. McGinnis,Juergen Rapp,T. Bjorholm,Robert C. Duckworth,Venugopal Koikal Varma +10 more
TL;DR: In this article, the design of the first diversionor and first wall for the next generation of long-lived fusion facilities is discussed. But the design is not addressed. And it is essential for the future development of fusion facilities.
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Construction, Test, and Operation of a new RFQ at the Spallation Neutron Source (SNS)
Yoon W. Kang,Alexander Aleksandrov,William Barnett,Mark Champion,Mark Crofford,Baoxi Han,Sung-Woo Lee,John Moss,Charles Peters,Jeremy Price,Ronald Roseberry,James Schubert,Andrei Shishlo,Martin P Stockli,Christopher Stone,Robert F Welton,D. Williams,Alexander Zhukov +17 more
- 01 Jun 2018
Abstract: A new RFQ was successfully installed recently in the SNS linac to replace the old RFQ that was used for more than a decade with certain operational limitations. The new RFQ was completely tested with Hion source in the Beam Test Facility (BTF) at SNS. For robust operation of SNS at 1.4 MW, the full design beam power and to satisfy the beam current requirement of the forthcoming SNS proton power upgrade (PPU) project, an RFQ with enhanced performance and reliability was needed. The new RFQ was built to have the beam parameters identical to those of the first RFQ but with improved RF and mechanical stability and reliability for continuous operation of neutron production. The tests confirmed that the new RFQ can run with high beam transmission efficiency at around 90 % and notably improved operational stability. In this paper, construction, test, installation, and operation of the new RFQ in SNS are discussed with the performance improvements.
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Vacuum system upgrade for extended Q-range small-angle neutron scattering diffractometer (EQ-SANS) at SNS
TL;DR: The extended Q-range Small-angle Neutron Scattering Diffractometer instrument at the spallation neutron source (SNS), Oak Ridge, Tennessee, incorporates a 69 m3 detector vessel with a vacuum system which required an upgrade with respect to performance, ease of operation, and maintenance.
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Status and Performance of ORNL Spallation Neutron Source Accelerator Systems
Yoon W. Kang,Alexander Aleksandrov,David E. Anderson,Mark Champion,Mark Crofford,John D Galambos,Baoxi Han,Sang-Ho Kim,Sung-Woo Lee,Larry Longcoy,Karoly Magda,Mark Middendorf,John Moss,William Passmore,Vladimir V. Peplov,Charles Peters,Chip Piller,Michael A Plum,Jeremy Price,Ronald Roseberry,Robert B. Saethre,Jeffrey Saunders,James Schubert,Andrei Shishlo,Martin P Stockli,Christopher Stone,Robert F Welton,Mark W. Wezensky,D. Williams,Alexander Zhukov +29 more
- 01 Jun 2016
TL;DR: The Spallation Neutron Source (SNS) accelerator systems have been performing continuously and progressively since commissioning in 2006 to deliver the neutrons to beamlines as mentioned in this paper.
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Final Design of Vacuum Pumping Systems for the Material Plasma Exposure eXperiment
TL;DR: The material plasma exposure eXperiment (MPEX) vacuum pumping system is responsible for creating prototypic conditions in the plasma material interaction chamber that mimic those in a fusion reactor divertor region as discussed by the authors .
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