Proposed bunching scheme for a polarized H/sup -/ injector

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Improvements to the polarized H/sup -/ injector at LAMPF will include a two-stage buncher and beam chopper. The buncher scheme will permit the compression of a major part of the current in 20 rf cycles of the drift-tube linac (100 nsec) into a single rf cycle (5 nsec), thus making possible time-of-flight experiments with the polarized H/sup -/ beam. A proposed first buncher stage would use a ramp drive waveform; the second stage, a sinusoidal waveform. Design and sensitivity calculations are summarized, including beam energy considerations, buncher and chopper drive requirements, and longitudinal and transverse beam dynamics. The calculations indicate ... continued below

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Pages: 4

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Swain, G.R. & Browman, A.A. January 1, 1985.

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Description

Improvements to the polarized H/sup -/ injector at LAMPF will include a two-stage buncher and beam chopper. The buncher scheme will permit the compression of a major part of the current in 20 rf cycles of the drift-tube linac (100 nsec) into a single rf cycle (5 nsec), thus making possible time-of-flight experiments with the polarized H/sup -/ beam. A proposed first buncher stage would use a ramp drive waveform; the second stage, a sinusoidal waveform. Design and sensitivity calculations are summarized, including beam energy considerations, buncher and chopper drive requirements, and longitudinal and transverse beam dynamics. The calculations indicate that about 70% of the beam from the source may be bunched in the 1-nsec acceptance region of the linac, with less than 0.1% of the beam in neighboring rf cycles. 5 figs.

Physical Description

Pages: 4

Notes

NTIS, PC A02/MF A01.

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  • Particle accelerator conference, Vancouver, Canada, 13 May 1985

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  • Other: DE85012648
  • Report No.: LA-UR-85-1640
  • Report No.: CONF-850504-48
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5526648
  • Archival Resource Key: ark:/67531/metadc1092581

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1985

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • May 30, 2018, 12:25 p.m.

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Swain, G.R. & Browman, A.A. Proposed bunching scheme for a polarized H/sup -/ injector, article, January 1, 1985; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1092581/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.