Performance of the 1994/95 SLC final focus system

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A major upgrade to the SLC final focus was installed in 1994 to eliminate the dominant third-order aberration of the system, and thereby to reduce the vertical beam size at the IP by a factor of two. At low current, the optimal beam size of about 400 nm is now routinely established, and its sensitivity to orbit variations, to changes of emittance and energy spread, and to other beam parameters has been studied. For intensities above 3 {times} 10{sup 10} particles per bunch, tuning is more difficult due to increased fluctuations of energy, orbit, and emittances. Nonetheless, the expected beam ... continued below

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3 p.

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Zimmermann, F.; Barklow, T. & Ecklund, S. June 1, 1995.

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A major upgrade to the SLC final focus was installed in 1994 to eliminate the dominant third-order aberration of the system, and thereby to reduce the vertical beam size at the IP by a factor of two. At low current, the optimal beam size of about 400 nm is now routinely established, and its sensitivity to orbit variations, to changes of emittance and energy spread, and to other beam parameters has been studied. For intensities above 3 {times} 10{sup 10} particles per bunch, tuning is more difficult due to increased fluctuations of energy, orbit, and emittances. Nonetheless, the expected beam size of about 600 nm has been observed. New procedures and diagnostics allow easier tuning and optimization of the final focus, and also a first measurement of the emittance increase in the arcs.

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3 p.

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INIS; OSTI as DE95014654

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  • 16. Institute of Electrical and Electronic Engineers (IEEE) particle accelerator conference, Dallas, TX (United States), 1-5 May 1995

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  • Other: DE95014654
  • Report No.: SLAC-PUB--95-6790
  • Report No.: CONF-950512--193
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 79139
  • Archival Resource Key: ark:/67531/metadc737640

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Office of Scientific & Technical Information Technical Reports

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  • June 1, 1995

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 2, 2016, 5:43 p.m.

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Zimmermann, F.; Barklow, T. & Ecklund, S. Performance of the 1994/95 SLC final focus system, article, June 1, 1995; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc737640/: accessed July 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.