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Title: Recent Innovations in Muon Beam Cooling

Abstract

Eight new ideas are being developed under SBIR/STTR grants to cool muon beams for colliders, neutrino factories, and muon experiments. Analytical and simulation studies have confirmed that a six-dimensional (6D) cooling channel based on helical magnets surrounding RF cavities filled with dense hydrogen gas can provide effective beam cooling. This helical cooling channel (HCC) has solenoidal, helical dipole, helical quadrupole, and helical sextupole magnetic fields to generate emittance exchange and achieve 6D emittance reduction of over 3 orders of magnitude in a 100 m segment. Four such sequential HCC segments, where the RF frequencies are increased and transverse physical dimensions reduced as the beams become cooler, implies a 6D emittance reduction of almost five orders of magnitude. Two new cooling ideas, Parametric-resonance Ionization Cooling and Reverse Emittance Exchange, then can be employed to reduce transverse emittances to a few mm-mr, which allows high luminosity with fewer muons than previously imagined. We describe these new ideas as well as a new precooling idea based on a HCC with z dependent fields that can be used as MANX, an exceptional 6D cooling demonstration experiment.

Authors:
; ; ; ; ; ;  [1]; ; ; ; ; ; ; ; ; ;  [2]; ; ;  [3]
  1. Muons, Inc., Batavia, Illinois (United States)
  2. Fermi National Accelerator Laboratory, Batavia, Illinois (United States)
  3. Thomas Jefferson National Accelerator Facility, Newport News, Virginia (United States) (and others)
Publication Date:
OSTI Identifier:
20798432
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 821; Journal Issue: 1; Conference: COOL05: International workshop on beam cooling and related topics, Galena, IL (United States), 18-23 Sep 2005; Other Information: DOI: 10.1063/1.2190143; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; ADIABATIC DEMAGNETIZATION; BEAM BENDING MAGNETS; BEAM COOLING; BEAM DYNAMICS; BEAM FOCUSING MAGNETS; BEAM LUMINOSITY; CAVITY RESONATORS; COMPUTERIZED SIMULATION; DIPOLES; HYDROGEN; IONIZATION; MAGNETIC FIELDS; MUON BEAMS; MUONS; NEUTRINOS; QUADRUPOLES

Citation Formats

Johnson, Rolland P., Alsharo'a, Mohammad, Hanlet, Pierrick M., Hartline, Robert, Kuchnir, Moyses, Paul, Kevin, Roberts, Thomas J., Ankenbrandt, Charles, Barzi, Emanuela, Del Frate, Licia, Gonin, Ivan, Moretti, Alfred, Neuffer, David, Popovic, Milorad, Romanov, Gennady, Turrioni, Daniele, Yarba, Victor, Beard, Kevin, Bogacz, S. Alex, and Derbenev, Yaroslav. Recent Innovations in Muon Beam Cooling. United States: N. p., 2006. Web. doi:10.1063/1.2190143.
Johnson, Rolland P., Alsharo'a, Mohammad, Hanlet, Pierrick M., Hartline, Robert, Kuchnir, Moyses, Paul, Kevin, Roberts, Thomas J., Ankenbrandt, Charles, Barzi, Emanuela, Del Frate, Licia, Gonin, Ivan, Moretti, Alfred, Neuffer, David, Popovic, Milorad, Romanov, Gennady, Turrioni, Daniele, Yarba, Victor, Beard, Kevin, Bogacz, S. Alex, & Derbenev, Yaroslav. Recent Innovations in Muon Beam Cooling. United States. doi:10.1063/1.2190143.
Johnson, Rolland P., Alsharo'a, Mohammad, Hanlet, Pierrick M., Hartline, Robert, Kuchnir, Moyses, Paul, Kevin, Roberts, Thomas J., Ankenbrandt, Charles, Barzi, Emanuela, Del Frate, Licia, Gonin, Ivan, Moretti, Alfred, Neuffer, David, Popovic, Milorad, Romanov, Gennady, Turrioni, Daniele, Yarba, Victor, Beard, Kevin, Bogacz, S. Alex, and Derbenev, Yaroslav. Mon . "Recent Innovations in Muon Beam Cooling". United States. doi:10.1063/1.2190143.
@article{osti_20798432,
title = {Recent Innovations in Muon Beam Cooling},
author = {Johnson, Rolland P. and Alsharo'a, Mohammad and Hanlet, Pierrick M. and Hartline, Robert and Kuchnir, Moyses and Paul, Kevin and Roberts, Thomas J. and Ankenbrandt, Charles and Barzi, Emanuela and Del Frate, Licia and Gonin, Ivan and Moretti, Alfred and Neuffer, David and Popovic, Milorad and Romanov, Gennady and Turrioni, Daniele and Yarba, Victor and Beard, Kevin and Bogacz, S. Alex and Derbenev, Yaroslav},
abstractNote = {Eight new ideas are being developed under SBIR/STTR grants to cool muon beams for colliders, neutrino factories, and muon experiments. Analytical and simulation studies have confirmed that a six-dimensional (6D) cooling channel based on helical magnets surrounding RF cavities filled with dense hydrogen gas can provide effective beam cooling. This helical cooling channel (HCC) has solenoidal, helical dipole, helical quadrupole, and helical sextupole magnetic fields to generate emittance exchange and achieve 6D emittance reduction of over 3 orders of magnitude in a 100 m segment. Four such sequential HCC segments, where the RF frequencies are increased and transverse physical dimensions reduced as the beams become cooler, implies a 6D emittance reduction of almost five orders of magnitude. Two new cooling ideas, Parametric-resonance Ionization Cooling and Reverse Emittance Exchange, then can be employed to reduce transverse emittances to a few mm-mr, which allows high luminosity with fewer muons than previously imagined. We describe these new ideas as well as a new precooling idea based on a HCC with z dependent fields that can be used as MANX, an exceptional 6D cooling demonstration experiment.},
doi = {10.1063/1.2190143},
journal = {AIP Conference Proceedings},
number = 1,
volume = 821,
place = {United States},
year = {Mon Mar 20 00:00:00 EST 2006},
month = {Mon Mar 20 00:00:00 EST 2006}
}