Hydrogen Filled RF Cavities for Muon Beam Cooling

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-08ER86350
Agency Tracking Number: 85233
Amount: $100,000.00
Phase: Phase I
Program: STTR
Awards Year: 2008
Solicitation Year: 2008
Solicitation Topic Code: 50 a
Solicitation Number: DE-PS02-07ER07-36
Small Business Information
Muons, Inc.
552 N. Batavia Ave., Batavia, IL, 60510
DUNS: 117921259
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Rolland Johnson
 (757) 870-6943
Business Contact
 Thomas Roberts
Title: Dr
Phone: (630) 840-2424
Email: tjrob@muonsinc.com
Research Institution
 Bruce Chrisman
 P.O. Box 500
Batavia, IL, 60510
 (630) 840-3000
 Federally funded R&D center (FFRDC)
Muon beams used in high energy physics research must be cooled as quickly as the short muon lifetime requires. This cooling is accomplished by ionization cooling, which requires low-Z energy absorbers immersed in a strong magnetic field and high-gradient, large-aperture RF cavities. However, RF cavities that operate in vacuum are vulnerable to dark-current-generated breakdown, which is exacerbated by strong magnetic fields; thus, extra safety windows are required to separate RF regions from hydrogen energy absorbers. These windows degrade the cooling. This project will develop RF cavities that are pressurized with dense hydrogen gas that will absorb the dark currents and allow the cavities to operate in strong magnetic fields. The same real estate will be used to provide the energy absorber and the RF acceleration needed for ionization cooling. To accomplish this development: (1) systematic measurements of the operation of a hydrogen-filled cavity will be made as a function of the external magnetic field and charged particle beam intensity; (2) a pressurized RF cavity will be designed, built, and tested; and (3) beam-induced gas breakdown will be studied by improving simulation models. Commercial Applications and other Benefits as described by the awardee: Commercial uses for bright muon beams include screening cargo containers for homeland security, low-dose radiography, and muon-catalyzed fusion. Scientific uses include low energy beams for rare process searches, muon spin resonance, muon beams for neutrino factories, and muon colliders such as Higgs factories or energy-frontier discovery machines.

* information listed above is at the time of submission.

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