Suppression of Space Charge Induced Beam Halo in Nonlinear Focusing Channel

Batygin, Yuri Konstantinovich; Scheinker, Alexander; Kurennoy, Sergey; Li, Chao

doi:10.1016/j.nima.2016.01.045

Title: Suppression of Space Charge Induced Beam Halo in Nonlinear Focusing Channel

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Abstract

An intense non-uniform particle beam exhibits strong emittance growth and halo formation in focusing channels due to nonlinear space charge forces of the beam. This phenomenon limits beam brightness and results in particle losses. The problem is connected with irreversible distortion of phase space volume of the beam in conventional focusing structures due to filamentation in phase space. Emittance growth is accompanied by halo formation in real space, which results in inevitable particle losses. We discuss a new approach for solving a self-consistent problem for a matched non-uniform beam in two-dimensional geometry. The resulting solution is applied to the problem of beam transport, while avoiding emittance growth and halo formation by the use of nonlinear focusing field. Conservation of a beam distribution function is demonstrated analytically and by particle-in-cell simulation for a beam with a realistic beam distribution.

Authors:

Batygin, Yuri Konstantinovich ^[1]; Scheinker, Alexander ^[1]; Kurennoy, Sergey ^[1]; Li, Chao ^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Inst. of High Energy Physics, Beijing (China)

Publication Date:: Fri Jan 29 00:00:00 EST 2016

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1329554

Report Number(s):: LA-UR-15-20477
Journal ID: ISSN 0168-9002

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

Additional Journal Information:: Journal Volume: 816; Journal ID: ISSN 0168-9002

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; Accelerator Design; Space charge; Halo; Quadrupole; Duodecapole; Emittance; Technology, and Operations

Citation Formats


                    Batygin, Yuri Konstantinovich, Scheinker, Alexander, Kurennoy, Sergey, and Li, Chao. Suppression of Space Charge Induced Beam Halo in Nonlinear Focusing Channel.  United States: N. p., 2016. 
Web.  doi:10.1016/j.nima.2016.01.045.

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                    Batygin, Yuri Konstantinovich, Scheinker, Alexander, Kurennoy, Sergey, & Li, Chao. Suppression of Space Charge Induced Beam Halo in Nonlinear Focusing Channel.  United States.  https://doi.org/10.1016/j.nima.2016.01.045

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                    Batygin, Yuri Konstantinovich, Scheinker, Alexander, Kurennoy, Sergey, and Li, Chao. Fri .  
"Suppression of Space Charge Induced Beam Halo in Nonlinear Focusing Channel".  United States.  https://doi.org/10.1016/j.nima.2016.01.045.  https://www.osti.gov/servlets/purl/1329554.

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@article{osti_1329554,

  title        = {Suppression of Space Charge Induced Beam Halo in Nonlinear Focusing Channel},

  author       = {Batygin, Yuri Konstantinovich and Scheinker, Alexander and Kurennoy, Sergey and Li, Chao},

  abstractNote = {An intense non-uniform particle beam exhibits strong emittance growth and halo formation in focusing channels due to nonlinear space charge forces of the beam. This phenomenon limits beam brightness and results in particle losses. The problem is connected with irreversible distortion of phase space volume of the beam in conventional focusing structures due to filamentation in phase space. Emittance growth is accompanied by halo formation in real space, which results in inevitable particle losses. We discuss a new approach for solving a self-consistent problem for a matched non-uniform beam in two-dimensional geometry. The resulting solution is applied to the problem of beam transport, while avoiding emittance growth and halo formation by the use of nonlinear focusing field. Conservation of a beam distribution function is demonstrated analytically and by particle-in-cell simulation for a beam with a realistic beam distribution.},

  doi          = {10.1016/j.nima.2016.01.045},

  journal      = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},

  number       = ,

  volume       = 816,

  place        = {United States},

  year         = {Fri Jan 29 00:00:00 EST 2016},

  month        = {Fri Jan 29 00:00:00 EST 2016}

}

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