Development of a fast traveling-wave beam chopper for the National Spallation Neutron Source

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High current and severe restrictions on beam losses, below 1 nA/m, in the designed linac for the National Spallation Neutron Source (NSNS) require clean and fast--with the rise time from 2% to 98% less than 2.5 ns to accommodate a 402.5-MHz beam structure--beam chopping in its front end, at the beam energy 2.5 MeV. The R and D program includes both modification of the existing LANSCE coax-plate chopper to reduce parasitic coupling between adjacent plates, and development of new traveling-wave deflecting structures, in particular, based on a meander line. Using analytical methods and three-dimensional time-domain computer simulations the authors study ... continued below

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5 p.

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Kurennoy, S.S.; Jason, A.J.; Krawczyk, F.L. & Power, J. October 1, 1997.

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High current and severe restrictions on beam losses, below 1 nA/m, in the designed linac for the National Spallation Neutron Source (NSNS) require clean and fast--with the rise time from 2% to 98% less than 2.5 ns to accommodate a 402.5-MHz beam structure--beam chopping in its front end, at the beam energy 2.5 MeV. The R and D program includes both modification of the existing LANSCE coax-plate chopper to reduce parasitic coupling between adjacent plates, and development of new traveling-wave deflecting structures, in particular, based on a meander line. Using analytical methods and three-dimensional time-domain computer simulations the authors study transient effects in such structures to choose an optimal chopper design.

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5 p.

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INIS; OSTI as DE97008187

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  • 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997

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  • Other: DE97008187
  • Report No.: LA-UR--97-1705
  • Report No.: CONF-970503--229
  • Grant Number: W-7405-ENG-36;AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 532539
  • Archival Resource Key: ark:/67531/metadc698136

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 29, 2016, 2 p.m.

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Kurennoy, S.S.; Jason, A.J.; Krawczyk, F.L. & Power, J. Development of a fast traveling-wave beam chopper for the National Spallation Neutron Source, article, October 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc698136/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.