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Title: Matching into the Helical Bunch Coalescing Channel for a High Luminosity Muon Collider

For high luminosity in a muon collider, muon bunches that have been cooled in the six-dimensional helical cooling channel (HCC) must be merged into a single bunch and further cooled in preparation for acceleration and transport to the collider ring. The helical bunch coalescing channel has been previously simulated and provides the most natural match from helical upstream and downstream subsystems. This work focuses on the matching from the exit of the multiple bunch HCC into the start of the helical bunch coalescing channel. The simulated helical matching section simultaneously matches the helical spatial period lambda in addition to providing the necessary acceleration for efficient bunch coalescing. Previous studies assumed that the acceleration of muon bunches from p=209.15 MeV/c to 286.816 MeV/c and matching of lambda from 0.5 m to 1.0 m could be accomplished with zero particle losses and zero emittance growth in the individual bunches. This study demonstrates nonzero values for both particle loss and emittance growth, and provides considerations for reducing these adverse effects to best preserve high luminosity.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [3] ;  [3] ;  [2]
  1. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
  2. Muons Inc., Batavia, IL (United States)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
OSTI Identifier:
1223456
Report Number(s):
JLAB-ACP--15-2067; DOE/OR/23177--3437
TRN: US1601431
DOE Contract Number:
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: IPAC 2015, Richmond, VA (United States), 3-8 May 2015
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; MUON BEAMS; COLLIDING BEAMS; BEAM LUMINOSITY; MEV RANGE 100-1000; PARTICLE LOSSES; ACCELERATION; COMPUTERIZED SIMULATION; BEAM COOLING; BEAM DYNAMICS; BEAM EMITTANCE; BEAM TRANSPORT; BEAM BUNCHING