High field – low energy muon ionization cooling channel

Kamal Sayed, Hisham; Palmer, Robert B.; Neuffer, David

doi:10.1103/PhysRevSTAB.18.091001

Title: High field – low energy muon ionization cooling channel

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Abstract

Muon beams are generated with large transverse and longitudinal emittances. In order to achieve the low emittances required by a muon collider, within the short lifetime of the muons, ionization cooling is required. Cooling schemes have been developed to reduce the muon beam 6D emittances to ≈ 300 μm–rad in transverse and ≈ 1–1.5 mm in longitudinal dimensions. The transverse emittance has to be further reduced to ≈ 50–25 μm–rad with an upper limit on the longitudinal emittance of ≈ 76 mm in order to meet the high-energy muon collider luminosity requirements. Earlier studies of the transverse cooling of low energy muon beams in high field magnets showed a promising performance, but did not include transverse or longitudinal matching between the stages. In this study we present the first complete design of the high field-low energy ionization cooling channel with transverse and longitudinal matching. The channel design was based on strong focusing solenoids with fields of 25–30 T and low momentum muon beam starting at 135 MeV/c and gradually decreasing. The cooling channel design presented here is the first to reach ≈ 50 micron scale emittance beam. As a result, we present the channel’s optimized design parameters including the focusingmore »« less

Authors:: Kamal Sayed, Hisham; Palmer, Robert B.; Neuffer, David

Publication Date:: Fri Sep 04 00:00:00 EDT 2015

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1213971

Alternate Identifier(s):: OSTI ID: 1226323

Report Number(s):: FERMILAB-PUB-15-406-AD-APC
Journal ID: ISSN 1098-4402; PRABFM; 091001

Grant/Contract Number:: AC02-05CH11231; AC02-07CH11359; AC02-05CH1123; AC02-76CH03000

Resource Type:: Published Article

Journal Name:: Physical Review Special Topics - Accelerators and Beams

Additional Journal Information:: Journal Volume: 18; Journal Issue: 9; Journal ID: ISSN 1098-4402

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Kamal Sayed, Hisham, Palmer, Robert B., and Neuffer, David. High field – low energy muon ionization cooling channel.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevSTAB.18.091001.

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                    Kamal Sayed, Hisham, Palmer, Robert B., & Neuffer, David. High field – low energy muon ionization cooling channel.  United States.  https://doi.org/10.1103/PhysRevSTAB.18.091001

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                    Kamal Sayed, Hisham, Palmer, Robert B., and Neuffer, David. Fri .  
"High field – low energy muon ionization cooling channel".  United States.  https://doi.org/10.1103/PhysRevSTAB.18.091001.

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@article{osti_1213971,

  title        = {High field – low energy muon ionization cooling channel},

  author       = {Kamal Sayed, Hisham and Palmer, Robert B. and Neuffer, David},

  abstractNote = {Muon beams are generated with large transverse and longitudinal emittances. In order to achieve the low emittances required by a muon collider, within the short lifetime of the muons, ionization cooling is required. Cooling schemes have been developed to reduce the muon beam 6D emittances to ≈ 300 μm–rad in transverse and ≈ 1–1.5 mm in longitudinal dimensions. The transverse emittance has to be further reduced to ≈ 50–25 μm–rad with an upper limit on the longitudinal emittance of ≈ 76 mm in order to meet the high-energy muon collider luminosity requirements. Earlier studies of the transverse cooling of low energy muon beams in high field magnets showed a promising performance, but did not include transverse or longitudinal matching between the stages. In this study we present the first complete design of the high field-low energy ionization cooling channel with transverse and longitudinal matching. The channel design was based on strong focusing solenoids with fields of 25–30 T and low momentum muon beam starting at 135 MeV/c and gradually decreasing. The cooling channel design presented here is the first to reach ≈ 50 micron scale emittance beam. As a result, we present the channel’s optimized design parameters including the focusing solenoid fields, absorber parameters and the transverse and longitudinal matching.},

  doi          = {10.1103/PhysRevSTAB.18.091001},

  journal      = {Physical Review Special Topics - Accelerators and Beams},

  number       = 9,

  volume       = 18,

  place        = {United States},

  year         = {Fri Sep 04 00:00:00 EDT 2015},

  month        = {Fri Sep 04 00:00:00 EDT 2015}

}

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