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Title: Muon Beam Helical Cooling Channel Design

The Helical Cooling Channel (HCC) achieves effective ionization cooling of the six-dimensional (6d) phase space of a muon beam by means of a series of 21st century inventions. In the HCC, hydrogen-pressurized RF cavities enable high RF gradients in strong external magnetic fields. The theory of the HCC, which requires a magnetic field with solenoid, helical dipole, and helical quadrupole components, demonstrates that dispersion in the gaseous hydrogen energy absorber provides effective emittance exchange to enable longitudinal ionization cooling. The 10-year development of a practical implementation of a muon-beam cooling device has involved a series of technical innovations and experiments that imply that an HCC of less than 300 m length can cool the 6d emittance of a muon beam by six orders of magnitude. We describe the design and construction plans for a prototype HCC module based on oxygen-doped hydrogen-pressurized RF cavities that are loaded with dielectric, fed by magnetrons, and operate in a superconducting helical solenoid magnet.
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Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-ACC-13-1690; DOE/OR/23177-3135
U.S. DOE STTR Grant DE-SC0006266
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: COOL'13 , June 13-16, 2013, Mürren, Switzerland
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States