Measurements of stability limits for a space-charge-dominated ion beam in a long A. G. transport channel

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The Single Beam Transport Experiment at LBL consists of 82 electrostatic quadrupole lenses arranged in a FODO lattice. Five further lenses provide a matched beam from a high-current high-brightness cesium source for injection into the FODO channel. We call the transport conditions stable if both the emittance and current remain unchanged between the beginning and end of the channel, and unstable if either the emittance grows or the current decreases because of collective effects. We have explored the range of single-particle betatron phase advance per period from sigma/sub 0/ = 45/sup 0/ to 150/sup 0/ to determine the stability limits ... continued below

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Pages: 6

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Tiefenback, M.G. & Keefe, D. May 1, 1985.

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The Single Beam Transport Experiment at LBL consists of 82 electrostatic quadrupole lenses arranged in a FODO lattice. Five further lenses provide a matched beam from a high-current high-brightness cesium source for injection into the FODO channel. We call the transport conditions stable if both the emittance and current remain unchanged between the beginning and end of the channel, and unstable if either the emittance grows or the current decreases because of collective effects. We have explored the range of single-particle betatron phase advance per period from sigma/sub 0/ = 45/sup 0/ to 150/sup 0/ to determine the stability limits for the space-charge depressed phase advance, sigma. No lower limit for sigma (down to 7/sup 0/) has been found at sigma/sub 0/ = 60/sup 0/, whereas limits have clearly been identified and mapped in the region of sigma/sub 0/ above 90/sup 0/.

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Pages: 6

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NTIS, PC A02/MF A01; 1.

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  • Particle accelerator conference, Vancouver, Canada, 13 May 1985

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  • Other: DE85016636
  • Report No.: LBL-19647
  • Report No.: CONF-850504-241
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 5292340
  • Archival Resource Key: ark:/67531/metadc1066751

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1985

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 24, 2018, 7:26 p.m.

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Tiefenback, M.G. & Keefe, D. Measurements of stability limits for a space-charge-dominated ion beam in a long A. G. transport channel, article, May 1, 1985; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1066751/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.