Electron Cloud Measurements in Heavy-Ion Driver for HEDP and Inertial Fusion Energy

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The High Current Experiment (HCX) at LBNL is a driver scale single beam injector that provides a 1 MeV K+ ion beam current of 0.18 A for 5 {micro}s. It transports high-current beams with large fill factor (ratio of the maximum beam envelope radius to the beam pipe radius) and low emittance growth that are required to keep the cost of the power plant competitive and to satisfy the target requirements of focusing ion beams to high-power density. Beam interaction with the background gas and walls desorbs electrons that can multiply and accumulate, creating an electron cloud. This ubiquitous effect ... continued below

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Covo, M K; Molvik, A W; Friedman, A; Cohen, R; Vay, J; Bieniosek, F et al. August 16, 2006.

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The High Current Experiment (HCX) at LBNL is a driver scale single beam injector that provides a 1 MeV K+ ion beam current of 0.18 A for 5 {micro}s. It transports high-current beams with large fill factor (ratio of the maximum beam envelope radius to the beam pipe radius) and low emittance growth that are required to keep the cost of the power plant competitive and to satisfy the target requirements of focusing ion beams to high-power density. Beam interaction with the background gas and walls desorbs electrons that can multiply and accumulate, creating an electron cloud. This ubiquitous effect grows at higher fill factors and degrades the quality of the beam. We review simulations and diagnostics tools used to measure electron production, accumulation and its properties.

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PDF-file: 16 pages; size: 1 Mbytes

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  • Journal Name: Nuclear Instruments and Methods in Physics Research, Section B, vol. 261, no. 1-2, May 3, 2007, pp. 980-985; Journal Volume: 261; Journal Issue: 1-2

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  • Report No.: UCRL-JRNL-223814
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 915208
  • Archival Resource Key: ark:/67531/metadc887692

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Office of Scientific & Technical Information Technical Reports

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  • August 16, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 2:48 p.m.

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Covo, M K; Molvik, A W; Friedman, A; Cohen, R; Vay, J; Bieniosek, F et al. Electron Cloud Measurements in Heavy-Ion Driver for HEDP and Inertial Fusion Energy, article, August 16, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc887692/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.