Crab crossing in a large hadron collider

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Since its invention by Palmer in 1988, crab crossing has been explored by many people for both linear and storage ring collides to allow for an angle crossing without a loss of luminosity. Various crab crossing scenarios have been incorporated in the design of newly proposed linear collides and {Beta}-factory projects. For a hadron collider, this scheme can also be employed to lower {Beta}* at the interaction point for a higher luminosity. In this paper, we first review the principle and operational requirements of various crab crossing schemes for storage ring collides. A Hamiltonian formalism is developed to study the ... continued below

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6 p.

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Wei, Jie December 1, 1996.

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Description

Since its invention by Palmer in 1988, crab crossing has been explored by many people for both linear and storage ring collides to allow for an angle crossing without a loss of luminosity. Various crab crossing scenarios have been incorporated in the design of newly proposed linear collides and {Beta}-factory projects. For a hadron collider, this scheme can also be employed to lower {Beta}* at the interaction point for a higher luminosity. In this paper, we first review the principle and operational requirements of various crab crossing schemes for storage ring collides. A Hamiltonian formalism is developed to study the dynamics of crab crossing and the related synchro-betatron coupling. Requirements are obtained for the operational voltage and frequency of the crab cavities, and for the accuracy of voltage matching and phase matching of the cavities. For the recently proposed high-field hadron collider, a deflection crabbing scheme can be used to reduce {Beta}* from 0. 1 m to 0.05 m and below, without a loss of luminosity due to angle crossing. The required voltage of the storage rf system is reduced from 100 MV to below 10 MV. With the same frequency of 379 MHz operating in a transverse mode, the required voltage of the crab cavities is about 3.2{approximately}4.4 MV. The required accuracy of voltage and betatron-phase matching is about 1 %.

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6 p.

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INIS; OSTI as DE97001557

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  • 1996 DPF/DPB workshop on new directions for high energy physics, Snowmass, CO (United States), 25 Jun - 12 Jul 1996

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  • Other: DE97001557
  • Report No.: BNL--63534
  • Report No.: CONF-9606243--20
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 414619
  • Archival Resource Key: ark:/67531/metadc684125

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  • December 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 9, 2015, 9:39 p.m.

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Wei, Jie. Crab crossing in a large hadron collider, article, December 1, 1996; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc684125/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.