Author: Plum, M.A.
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MOPRI103 Longitudinal Bunch Shortening for the Laser Stripping Project 861
 
  • T.V. Gorlov, A.V. Aleksandrov, S.M. Cousineau, V.V. Danilov, Y. Liu, M.A. Plum
    ORNL, Oak Ridge, Tennessee, USA
  
  Funding: This work is funded by the U.S. DOE under grant number DE-FG02-13ER41967, and by the U.S. DOE under contract number DE-AC05-00OR22725 with UT-Battelle Corporation.
Realization of high efficiency laser stripping at the SNS accelerator needs good longitudinal overlap between H− bunch and laser pulse. The default H− bunch length at the interaction point is 5 times bigger than needed in order to achieve 90% stripping efficiency. Theoretical and experimental studies of longitudinal H− bunch shortening are presented in this paper. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI103  
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WEOBA03 Status of Preparations for a 10 μs Laser-Assisted H− Beam Stripping Experiment 1864
 
  • S.M. Cousineau, A.V. Aleksandrov, V.V. Danilov, T.V. Gorlov, Y. Liu, A.A. Menshov, M.A. Plum, A.P. Shishlo, Y. Wang
    ORNL, Oak Ridge, Tennessee, USA
  • F.G. Garcia, N.F. Luttrell
    UTK, Knoxville, Tennessee, USA
  • D.E. Johnson
    Fermilab, Batavia, Illinois, USA
  • A. Rakhman
    ORNL RAD, Oak Ridge, Tennessee, USA
  • Y. Takeda
    KEK, Ibaraki, Japan
  
  Funding: This work is funded by the U.S. DOE under grant number DE-FG02-13ER41967, and by the U.S. DOE under contract number DE-AC05-00OR22725 with UT-Battelle Corporation.
The concept of laser-assisted H− stripping, originated over three decades ago, was successfully demonstrated for a 6 ns, 900 MeV H− beam in 2006. Plans are underway to build on this foundation by performing laser-assisted H− stripping of a 10 μs, 1 GeV H− beam at the Spallation Neutron Source facility; this constitutes a three orders of magnitude improvement over the initial proof of principle demonstration. The central theme of the experiment is the reduction of the required laser power through ion beam manipulations and laser-ion beam temporal matching. This paper discusses the configuration of the experiment, the current and anticipated challenges, and the schedule. 		 
slides icon Slides WEOBA03 [2.549 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEOBA03  
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WEPRO079 Accelerator Systems Modifications for a Second Target Station at the Oak Ridge Spallation Neutron Source 2140
 
  • M.A. Plum, J. Galambos, S.-H. Kim
    ORNL, Oak Ridge, Tennessee, USA
  
  Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.
A second target station is planned for the Oak Ridge Spallation Neutron Source. The ion source will be upgraded to increase the peak current from 38 to 49 mA, additional superconducting RF cavities will be added to the linac to increase the H− beam energy from 933 to 1300 MeV, and the accumulator ring will receive modifications to the injection and extraction systems to accommodate the higher beam energy. After pulse compression in the storage ring one sixth of the beam pulses (10 out of 60 Hz) will be diverted to the second target by kicker and septum magnets added to the existing Ring to Target Beam Transport (RTBT) line. No further modifications will be made to the RTBT so that when the kicker and septum magnets are turned off the original target 1 beam transport lattice will be unaffected. In this paper we will discuss these and other planned modifications and upgrades to the accelerator facility, and also the status of this project. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO079  
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