Choice of parameters for linear colliders in multi-bunch mode

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The energy efficiency of a linear collider in multi-bunch mode is calculated for the case that the bunches in each of the two interacting beams are identical in all interaction points, a configuration which can be realized by taking advantage of the beam-beam effect between beams of opposite electric charge. The maximization of the efficiency is discussed, the maximum appears to increase nearly linearly with beam brightness and accelerating gradient, and about quadratically with the length of the ir. The optimum operating frequency for the linacs increases also, while the pulse repetition rate and the beam current needed for fixed … continued below

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30 pages

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Claus, J. January 1, 1987.

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The energy efficiency of a linear collider in multi-bunch mode is calculated for the case that the bunches in each of the two interacting beams are identical in all interaction points, a configuration which can be realized by taking advantage of the beam-beam effect between beams of opposite electric charge. The maximization of the efficiency is discussed, the maximum appears to increase nearly linearly with beam brightness and accelerating gradient, and about quadratically with the length of the ir. The optimum operating frequency for the linacs increases also, while the pulse repetition rate and the beam current needed for fixed luminosity, decrease. The increasing brightness and the decreasing current needed for higher efficiency lead to smaller transverse spotsizes in the crossing points; this imposes tighter tolerances on the relative transverse coordinates of the two beam-axes. Pillbox or similar resonators, excited in the TM01 mode, may be preferable to quadrupoles for transverse focusing, at the high frequencies and gradients that seem desirable, particularly in the final focus. 4 refs., 7 figs.

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30 pages

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NTIS, PC A03/MF A01; 1.

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  • Workshop on new developments in particle acceleration techniques, Orsay, France, 29 Jun 1987

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  • Other: DE87013648
  • Report No.: BNL-40268
  • Report No.: CONF-8706147-8
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 5895252
  • Archival Resource Key: ark:/67531/metadc1099085

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  • January 1, 1987

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  • Feb. 18, 2018, 3:59 p.m.

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  • Feb. 1, 2021, 9:01 p.m.

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Claus, J. Choice of parameters for linear colliders in multi-bunch mode, article, January 1, 1987; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1099085/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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