Development of a fast traveling-wave beam chopper for the SNS project

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High current and stringent restrictions on beam losses, below 1 nA/m, in the designed linac for the Spallation Neutron Source (SNS) require clean and fast--with the rise time from 2% to 98% less than 2.5 ns--beam chopping in its front end, at the beam energy 2.5 MeV. The development of new traveling-wave deflecting current structures based on meander lines is discussed. Three-dimensional time-domain computer simulations with MAFIA are used to study transient effects in the chopper and to optimize current structure design. Two options for the fast pulsed voltage generator--based on FETs and vacuum tubes--are considered, and their advantages and ... continued below

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4 p.

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Kurennoy, S.S. & Power, J.F. December 31, 1998.

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Description

High current and stringent restrictions on beam losses, below 1 nA/m, in the designed linac for the Spallation Neutron Source (SNS) require clean and fast--with the rise time from 2% to 98% less than 2.5 ns--beam chopping in its front end, at the beam energy 2.5 MeV. The development of new traveling-wave deflecting current structures based on meander lines is discussed. Three-dimensional time-domain computer simulations with MAFIA are used to study transient effects in the chopper and to optimize current structure design. Two options for the fast pulsed voltage generator--based on FETs and vacuum tubes--are considered, and their advantages and shortcomings for the SNS chopper are discussed.

Physical Description

4 p.

Notes

INIS; OSTI as DE99002755

Source

  • 19. international linac conference, Chicago, IL (United States), 23-28 Aug 1998

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  • Other: DE99002755
  • Report No.: LA-UR--98-3695
  • Report No.: CONF-980827--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 350976
  • Archival Resource Key: ark:/67531/metadc680311

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  • December 31, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 5, 2016, 7:28 p.m.

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Kurennoy, S.S. & Power, J.F. Development of a fast traveling-wave beam chopper for the SNS project, article, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc680311/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.