Electron-Cloud Build-up in the FNAL Main Injector

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We present a summary on ongoing simulation results for the electron-cloud buildup in the context of the proposed FNAL Main Injector (MI) intensity upgrade [1] in a fieldfree region at the location of the RFA electron detector [2]. By combining our simulated results for the electron flux at the vacuum chamber wall with the corresponding measurements obtained with the RFA we infer that the peak secondary electron yield (SEY) {delta}{sub max} is {approx}> 1.4, and the average electron density is n{sub e} {approx}> 10{sup 10} m{sup -3} at transition energy for the specific fill pattern and beam intensities defined below. ... continued below

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Furman, M.A. June 4, 2007.

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We present a summary on ongoing simulation results for the electron-cloud buildup in the context of the proposed FNAL Main Injector (MI) intensity upgrade [1] in a fieldfree region at the location of the RFA electron detector [2]. By combining our simulated results for the electron flux at the vacuum chamber wall with the corresponding measurements obtained with the RFA we infer that the peak secondary electron yield (SEY) {delta}{sub max} is {approx}> 1.4, and the average electron density is n{sub e} {approx}> 10{sup 10} m{sup -3} at transition energy for the specific fill pattern and beam intensities defined below. The sensitivity of our results to several variables remains to be explored in order to reach more definitive results. Effects from the electron cloud on the beam are being investigated separately [3].

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  • ECLOUD07 Workshop, Daegu, S. Korea, April 9-12,2007

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  • Report No.: LBNL--62738
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 929762
  • Archival Resource Key: ark:/67531/metadc897556

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  • June 4, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 4:05 p.m.

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Furman, M.A. Electron-Cloud Build-up in the FNAL Main Injector, article, June 4, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc897556/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.