Beam-based determination of the offset of Booster {gamma}{sub T} quads

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Description

Twelve pulsed {gamma}{sub T} quads have been installed in the Booster to provide fast transition crossing. The less time the beam stays in the non-adiabatic period near transition, the less the longitudinal emittance grows. From the past experience, the {gamma}{sub T} quads are not well aligned relative to the usual closed orbit. Quad steering can cause beam loss and a dispersion wave after transition. To make the {gamma}{sub T} quads routinely operational, procedures for finding the center of the beam relative to the quads and centering the beam through all of them are very important. A program, which uses the ... continued below

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792 Kilobytes pages

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Xi Yang, Charles M. Ankenbrandt and James MacLachlan June 23, 2004.

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Description

Twelve pulsed {gamma}{sub T} quads have been installed in the Booster to provide fast transition crossing. The less time the beam stays in the non-adiabatic period near transition, the less the longitudinal emittance grows. From the past experience, the {gamma}{sub T} quads are not well aligned relative to the usual closed orbit. Quad steering can cause beam loss and a dispersion wave after transition. To make the {gamma}{sub T} quads routinely operational, procedures for finding the center of the beam relative to the quads and centering the beam through all of them are very important. A program, which uses the difference in the closed orbits when {gamma}{sub T} quads are on and off and calculates the offsets of the beam relative to {gamma}{sub T} quads, has been developed and tested. A radial orbit offset (ROF) of about 3 mm has been experimentally determined to be nearly the optimal radial position for centering the beam through all the {gamma}{sub T} quads, thereby eliminating the immediate need for repositioning the quads.

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792 Kilobytes pages

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  • Other Information: PBD: 23 Jun 2004

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  • Report No.: FERMILAB-Tm-2254
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 825278
  • Archival Resource Key: ark:/67531/metadc779763

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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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  • June 23, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 4, 2016, 7:32 p.m.

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Xi Yang, Charles M. Ankenbrandt and James MacLachlan. Beam-based determination of the offset of Booster {gamma}{sub T} quads, report, June 23, 2004; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc779763/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.