Longitudinal space charge in the SLC, FFTB and NLC final-focus systems

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In a final-focus system, space-charge forces can be significant even for very high beam energies. The reason is the inherent large chromaticity of such a system, which needs to be compensated to a high precision. The longitudinal space-charge force causes an energy variation along the bunch, which depends on beam size, beam-pipe radius, and bunch population. Since this energy variation is location-dependent, it may affect the chromatic correction and, thereby, increase the IP spot size. The spacecharge force then gives rise to a limit on bunch intensity beyond which the resulting spot-size increase will degrade the final-focus performance. In this ... continued below

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4 p.

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Zimmermann, F. & Raubenheimer, T.O. June 1, 1996.

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Description

In a final-focus system, space-charge forces can be significant even for very high beam energies. The reason is the inherent large chromaticity of such a system, which needs to be compensated to a high precision. The longitudinal space-charge force causes an energy variation along the bunch, which depends on beam size, beam-pipe radius, and bunch population. Since this energy variation is location-dependent, it may affect the chromatic correction and, thereby, increase the IP spot size. The spacecharge force then gives rise to a limit on bunch intensity beyond which the resulting spot-size increase will degrade the final-focus performance. In this paper, the effect of longitudinal space charge is evaluated and intensity limits are derived for three existing or proposed final foci.

Physical Description

4 p.

Notes

OSTI as DE97009073

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  • EPAC `96: 5. European particle accelerator conference, Barcelona (Spain), 10-14 Jun 1996

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  • Other: DE97009073
  • Report No.: SLAC-PUB--7139
  • Report No.: CONF-960621--
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 572662
  • Archival Resource Key: ark:/67531/metadc691483

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  • June 1, 1996

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 5, 2016, 7:02 p.m.

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Zimmermann, F. & Raubenheimer, T.O. Longitudinal space charge in the SLC, FFTB and NLC final-focus systems, article, June 1, 1996; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc691483/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.