Importance of high order momentum terms in SLC optics

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The evaluation of background levels at the SLC relies, in several cases, on the proper representation of how low momentum electrons propagate through the Arcs and the Final Focus System (FFS). For example, beam - gas bremsstrahlung in the arcs causes electrons of up to 6% energy loss to be transported through to the IP; secondary showers on edges of masks and collimators yield debris with a very wide momentum spectrum. This note is a naive attempt at checking the validity of TRANSPORT and TURTLE calculations, by evaluating the contributions of the momentum terms to increasingly higher order, and checking ... continued below

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Pages: 9

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Kozanecki, W. July 10, 1985.

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Description

The evaluation of background levels at the SLC relies, in several cases, on the proper representation of how low momentum electrons propagate through the Arcs and the Final Focus System (FFS). For example, beam - gas bremsstrahlung in the arcs causes electrons of up to 6% energy loss to be transported through to the IP; secondary showers on edges of masks and collimators yield debris with a very wide momentum spectrum. This note is a naive attempt at checking the validity of TRANSPORT and TURTLE calculations, by evaluating the contributions of the momentum terms to increasingly higher order, and checking the mutual consistency of the results produced by the two methods on a beam of wide momentum spread. 8 refs., 4 figs., 1 tab.

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Pages: 9

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NTIS, PC A02/MF A01; 1.

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  • Other Information: Portions of this document are illegible in microfiche products

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  • Other: DE85016249
  • Report No.: SLAC-CN-304
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/5419377 | External Link
  • Office of Scientific & Technical Information Report Number: 5419377
  • Archival Resource Key: ark:/67531/metadc1063926

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Creation Date

  • July 10, 1985

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

Description Last Updated

  • May 29, 2018, 12:53 p.m.

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Kozanecki, W. Importance of high order momentum terms in SLC optics, report, July 10, 1985; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc1063926/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.