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Title: Recent Innovations in Muon Beam Cooling

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:
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Publication Date:
OSTI Identifier:
883803
Report Number(s):
JLAB-ACP-05-389; DOE/ER/40150-3938
TRN: US200615%%258
DOE Contract Number:
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: International Workshop on Beam Cooling and Related Topics (COOL05), Eagle Ridge, Galena, Illinois, 18 - 23 Sep 200
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org:
USDOE - Office of Energy Research (ER)
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; BEAM COOLING; CAVITIES; DIMENSIONS; HYDROGEN; IONIZATION; LUMINOSITY; MAGNETIC FIELDS; MAGNETS; MUON BEAMS; MUONS; NEUTRINOS; SIMULATION