4D Emittance Measurements Using Multiple Wire and Waist Scan Methods in the ATF Extraction Line

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Emittance measurements performed in the diagnostic section of the Accelerator Test Facility (ATF) extraction line since 1998 led to vertical emittances three times larger than the expected ones, with a strong dependence on intensity. An experimental program is pursued to investigate potential sources of emittance growth and find possible remedies. This requires efficient and reliable emittance measurement techniques. In the past, several phase-space reconstruction methods developed at SLAC and KEK have been used to estimate the vertical emittance, based on multiple location beam size measurements and dedicated quadrupole scans. These methods have been shown to be very sensitive to measurement ... continued below

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3 pages

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Rimbault, C.; Bambade, P.; Brossard, J.; /Orsay, LAL; Alabau, M.; /Valencia U., IFIC et al. November 2, 2011.

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Emittance measurements performed in the diagnostic section of the Accelerator Test Facility (ATF) extraction line since 1998 led to vertical emittances three times larger than the expected ones, with a strong dependence on intensity. An experimental program is pursued to investigate potential sources of emittance growth and find possible remedies. This requires efficient and reliable emittance measurement techniques. In the past, several phase-space reconstruction methods developed at SLAC and KEK have been used to estimate the vertical emittance, based on multiple location beam size measurements and dedicated quadrupole scans. These methods have been shown to be very sensitive to measurement errors and other fluctuations in the beam conditions. In this context new emittance measurements have been performed revisiting these methods and newly developed ones with a systematic approach to compare and characterise their performance in the ATF extraction line.

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3 pages

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  • Journal Name: Conf.Proc.C0806233:tupc087,2008; Conference: EPAC'08, 11th European Particle Accelerator Conference, 23-27 June 2008, Genoa, Italy

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  • Report No.: SLAC-PUB-14676
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1028695
  • Archival Resource Key: ark:/67531/metadc833440

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  • November 2, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 2, 2016, 6:59 p.m.

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Rimbault, C.; Bambade, P.; Brossard, J.; /Orsay, LAL; Alabau, M.; /Valencia U., IFIC et al. 4D Emittance Measurements Using Multiple Wire and Waist Scan Methods in the ATF Extraction Line, article, November 2, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc833440/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.