Third integer resonance extraction with presence of higher multipoles

Nagaslaev, V.; Brown, K. A.; Tomizawa, M.

doi:10.1103/PhysRevAccelBeams.22.043501

Title: Third integer resonance extraction with presence of higher multipoles

Abstract

The slow resonant extraction of a beam in a storage ring is a very well-established technique. Several high-energy physics accelerator facilities around the world are currently using this technique for high-intensity beam operations. As the demand for beam power is constantly growing, extraction efficiency in many cases is becoming a limiting factor. In this report, we discuss a new effective approach to improving the slow extraction efficiency by using configurations of higher multipoles. We will describe this approach, determine optimal multipole configurations, and present the results of simulations to support the proposed recipe. We found that, with the use of higher multipole field content, the extraction efficiency can be improved, and, therefore, the level of prompt and residual radioactivity in the accelerator components and surrounding buildings can be reduced by as much as 40% or more. We also explored manipulating the higher-order effects produced in the pure sextupole configurations for the same purpose and demonstrated that similar results can be achieved by only rearranging the sextupole magnets in the lattice.

Authors:: Nagaslaev, V.; Brown, K. A.; Tomizawa, M.

Publication Date:: Thu Apr 04 00:00:00 EDT 2019

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

Sponsoring Org.:: High Energy Accelerator Research Organization (KEK) (Japan); Japan Society for the Promotion of Science (JSPS); USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1505012

Alternate Identifier(s):: OSTI ID: 1506644; OSTI ID: 1508339

Report Number(s):: BNL-211529-2019-JAAM; FERMILAB-PUB-18-672-AD
Journal ID: ISSN 2469-9888; PRABCJ; 043501

Grant/Contract Number:: SC0012704; AC02-07CH11359

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 4; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; beam injection, extraction & transport

Citation Formats


                    Nagaslaev, V., Brown, K. A., and Tomizawa, M. Third integer resonance extraction with presence of higher multipoles.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevAccelBeams.22.043501.

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                    Nagaslaev, V., Brown, K. A., & Tomizawa, M. Third integer resonance extraction with presence of higher multipoles.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.22.043501

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                    Nagaslaev, V., Brown, K. A., and Tomizawa, M. Thu .  
"Third integer resonance extraction with presence of higher multipoles".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.22.043501.

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@article{osti_1505012,

  title        = {Third integer resonance extraction with presence of higher multipoles},

  author       = {Nagaslaev, V. and Brown, K. A. and Tomizawa, M.},

  abstractNote = {The slow resonant extraction of a beam in a storage ring is a very well-established technique. Several high-energy physics accelerator facilities around the world are currently using this technique for high-intensity beam operations. As the demand for beam power is constantly growing, extraction efficiency in many cases is becoming a limiting factor. In this report, we discuss a new effective approach to improving the slow extraction efficiency by using configurations of higher multipoles. We will describe this approach, determine optimal multipole configurations, and present the results of simulations to support the proposed recipe. We found that, with the use of higher multipole field content, the extraction efficiency can be improved, and, therefore, the level of prompt and residual radioactivity in the accelerator components and surrounding buildings can be reduced by as much as 40% or more. We also explored manipulating the higher-order effects produced in the pure sextupole configurations for the same purpose and demonstrated that similar results can be achieved by only rearranging the sextupole magnets in the lattice.},

  doi          = {10.1103/PhysRevAccelBeams.22.043501},

  journal      = {Physical Review Accelerators and Beams},

  number       = 4,

  volume       = 22,

  place        = {United States},

  year         = {Thu Apr 04 00:00:00 EDT 2019},

  month        = {Thu Apr 04 00:00:00 EDT 2019}

}

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Works referenced in this record:

Slow extraction from the J-PARC main ring using a dynamic bump
journal, September 2018

Tomizawa, M.; Arakaki, Y.; Kimura, T.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 902
DOI: 10.1016/j.nima.2018.06.004

The Particle Accelerator Simulation Code PyORBIT
journal, January 2015

Shishlo, Andrei; Cousineau, Sarah; Holmes, Jeffrey
Procedia Computer Science, Vol. 51
DOI: 10.1016/j.procs.2015.05.312

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Title: Third integer resonance extraction with presence of higher multipoles

Abstract

Citation Formats

Slow extraction from the J-PARC main ring using a dynamic bump journal, September 2018

The Particle Accelerator Simulation Code PyORBIT journal, January 2015

Slow extraction from the J-PARC main ring using a dynamic bump
journal, September 2018

The Particle Accelerator Simulation Code PyORBIT
journal, January 2015