Beam scraping efficiency in the 5 MW spallation neutron source

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Numerical calculations have been performed to evaluate the performance of a simple beam scraping system in the lattice of a rapid cycling (30 Hz) proton accelerator designed to be a high intensity spallation neutron source. The assumption has been made that beam loss will be dominated by rf capture inefficiency at injection (600 MeV kinetic) which is simulated as described below. Comparison is made with a ``sample calculation`` intended to illustrate betatron (beam halo) scraping at full energy which was assumed to be 3 GeV. The parameters of the lattice are those of the design as of April, 1993. The ... continued below

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12 p.

Creation Information

Stevens, A.J. December 1, 1993.

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Description

Numerical calculations have been performed to evaluate the performance of a simple beam scraping system in the lattice of a rapid cycling (30 Hz) proton accelerator designed to be a high intensity spallation neutron source. The assumption has been made that beam loss will be dominated by rf capture inefficiency at injection (600 MeV kinetic) which is simulated as described below. Comparison is made with a ``sample calculation`` intended to illustrate betatron (beam halo) scraping at full energy which was assumed to be 3 GeV. The parameters of the lattice are those of the design as of April, 1993. The results described here are restricted to a geometry wherein the primary scraper is treated as an aperture in the X (horizontal) coordinate. Evaluation of the efficacy of two dimensional scrapers, or scraping systems which employ magnetic fields remain as topics for further study. The purpose of this study was to determine to what extent beam losses can be confined to a local region of the proposed lattice. The remainder of this note describes the general methodology employed, the rf capture beam loss simulation, and the beam halo growth ``sample calculation``. Section V briefly summarizes the results of this study.

Physical Description

12 p.

Notes

INIS; OSTI as DE94009085

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  • Other Information: PBD: Dec 1993

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  • Other: DE94009085
  • Report No.: BNL--60019
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/142565 | External Link
  • Office of Scientific & Technical Information Report Number: 142565
  • Archival Resource Key: ark:/67531/metadc624765

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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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  • December 1, 1993

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Nov. 18, 2015, 6:44 p.m.

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Stevens, A.J. Beam scraping efficiency in the 5 MW spallation neutron source, report, December 1, 1993; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc624765/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.