A fast chopper for programmed population of the longitudinal phase space of the AGS Metadata

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  • Main Title A fast chopper for programmed population of the longitudinal phase space of the AGS


  • Author: Brennan, J.M.
    Creator Type: Personal
  • Author: Ahrens, L.
    Creator Type: Personal
  • Author: Alessi, J.
    Creator Type: Personal
  • Author: Brodowski, J.
    Creator Type: Personal
  • Author: Kats, J.
    Creator Type: Personal
  • Author: van Asselt, W.
    Creator Type: Personal


  • Name: Brookhaven National Laboratory
    Place of Publication: Upton, New York


  • Creation: 1989-01-01


  • English


  • Content Description: A fast beam chopper has been built that can produce an arbitrary pulse program of the 200 MeV H/sup /minus// beam for synchronous injection into moving rf buckets in the AGS. The chopper will eliminate rf capture losses and can be used to tailor the initial distribution in longitudinal phase space by varying the pulse parameters, width and phase, on a bunch-by-bunch time scale, during multi-turn injection. The chopper also serves as a studies tool since it can provide controllable beam intensity with fixed longitudinal emittance (and conversely) and/or missing bunches. It is an electrostatic deflection device with 15 pairs of plates located above and below the 35 keV H/sup /minus// beam between the ion source and the RFQ preinjector. The plates are space 26 mm apart in the beam direction and connected as a slow-wave structure by coaxial cables. They are driven to +- 760 V by dc-coupled pulse generators. Beam current rise and fall times are less than 10 ns. 3 figs.
  • Physical Description: Pages: 4


  • Keyword: Ion Sources
  • Keyword: Beam Injection
  • Keyword: Synchrotrons 430301* -- Particle Accelerators-- Ion Sources
  • Keyword: Space
  • Keyword: Mathematical Space
  • Keyword: Beam Bunchers
  • STI Subject Categories: 43 Particle Accelerators
  • Keyword: Beams
  • Keyword: Ion Beams
  • Keyword: Hydrogen 1 Minus Beams
  • Keyword: Cyclic Accelerators
  • Keyword: Design
  • Keyword: Brookhaven Ags
  • Keyword: Beam Emittance
  • Keyword: Accelerators
  • Keyword: Phase Space


  • Conference: 13. particle accelerator conference, Chicago, IL, USA, 20 Mar 1989


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Other: DE89012539
  • Report No.: BNL-41832
  • Report No.: CONF-890335-128
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 6233706
  • Archival Resource Key: ark:/67531/metadc1111791


  • Display Note: NTIS, PC A02 - OSTI; 3.