Stochastic Boundary, Diffusion, Emittance Growth and Lifetime calculation for the RHIC e-lens

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To compensate the large tune shift and tune spread generated by the head-on beam-beam interactions in polarized proton operation in the Relativistic Heavy Ion Collider (RHIC), a low energy electron beam with proper Gaussian transverse profiles was proposed to collide head-on with the proton beam. In this article, using a modified version of SixTrack [1], we investigate stability of the single particle in the presence of head-on beam-beam compensation. The Lyapunov exponent and action diffusion are calculated and compared between the cases without and with beam-beam compensation for two different working points and various bunch intensities. Using the action diffusion ... continued below

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Abreu,N.P.; Fischer, W.; Luo, Y. & Robert-Demolaize, G. January 20, 2009.

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To compensate the large tune shift and tune spread generated by the head-on beam-beam interactions in polarized proton operation in the Relativistic Heavy Ion Collider (RHIC), a low energy electron beam with proper Gaussian transverse profiles was proposed to collide head-on with the proton beam. In this article, using a modified version of SixTrack [1], we investigate stability of the single particle in the presence of head-on beam-beam compensation. The Lyapunov exponent and action diffusion are calculated and compared between the cases without and with beam-beam compensation for two different working points and various bunch intensities. Using the action diffusion results the emittance growth rate and lifetime of the proton beam is also estimated for the different scenarios.

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  • Report No.: BNL--81975-2009-IR
  • Grant Number: DE-AC02-98CH10886
  • DOI: 10.2172/946783 | External Link
  • Office of Scientific & Technical Information Report Number: 946783
  • Archival Resource Key: ark:/67531/metadc897631

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  • January 20, 2009

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 1, 2016, 5:40 p.m.

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Abreu,N.P.; Fischer, W.; Luo, Y. & Robert-Demolaize, G. Stochastic Boundary, Diffusion, Emittance Growth and Lifetime calculation for the RHIC e-lens, report, January 20, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc897631/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.