Accurate simulation of the electron cloud in the Fermilab Main Injector with VORPAL

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We present results from a precision simulation of the electron cloud (EC) in the Fermilab Main Injector using the code VORPAL. This is a fully 3d and self consistent treatment of the EC. Both distributions of electrons in 6D phase-space and E.M. field maps have been generated. This has been done for various configurations of the magnetic fields found around the machine have been studied. Plasma waves associated to the fluctuation density of the cloud have been analyzed. Our results are compared with those obtained with the POSINST code. The response of a Retarding Field Analyzer (RFA) to the EC ... continued below

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10 pages

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Lebrun, Paul L.G.; Spentzouris, Panagiotis; /Fermilab; Cary, John R.; Stoltz, Peter; Veitzer, Seth A. et al. January 1, 2011.

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We present results from a precision simulation of the electron cloud (EC) in the Fermilab Main Injector using the code VORPAL. This is a fully 3d and self consistent treatment of the EC. Both distributions of electrons in 6D phase-space and E.M. field maps have been generated. This has been done for various configurations of the magnetic fields found around the machine have been studied. Plasma waves associated to the fluctuation density of the cloud have been analyzed. Our results are compared with those obtained with the POSINST code. The response of a Retarding Field Analyzer (RFA) to the EC has been simulated, as well as the more challenging microwave absorption experiment. Definite predictions of their exact response are difficult to obtain,mostly because of the uncertainties in the secondary emission yield and, in the case of the RFA, because of the sensitivity of the electron collection efficiency to unknown stray magnetic fields. Nonetheless, our simulations do provide guidance to the experimental program.

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10 pages

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  • Presented at 49th ICFA Advance Beam Dynamics Workshop on Electron Cloud Physics (ECLOUD10), Ithaca, New York, 8-12 Oct 2010

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  • Report No.: FERMILAB-CONF-11-009-APC-CD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 1009180
  • Archival Resource Key: ark:/67531/metadc833818

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  • January 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 25, 2016, 2:54 p.m.

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Lebrun, Paul L.G.; Spentzouris, Panagiotis; /Fermilab; Cary, John R.; Stoltz, Peter; Veitzer, Seth A. et al. Accurate simulation of the electron cloud in the Fermilab Main Injector with VORPAL, article, January 1, 2011; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc833818/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.