Novel Linac Structures For Low-Beta Ions And For Muons
- Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
Development of two innovative linacs is discussed. (1)High-efficiency normal-conducting accelerating structures for ions with beam velocities in the range of a few percent of the speed of light. Two existing accelerator technologies - the H-mode resonator cavities and transverse beam focusing by permanent-magnet quadrupoles (PMQ) - are merged to create efficient structures for light-ion beams of considerable currents. The inter-digital H-mode accelerator with PMQ focusing (IH-PMQ) has the shunt impedance 10-20 times higher than the standard drift-tube linac. Results of the combined 3-D modeling for an IH-PMQ accelerator tank - electromagnetic computations, beam-dynamics simulations, and thermal-stress analysis - are presented. H-PMQ structures following a short RFQ accelerator can be used in the front end of ion linacs or in stand-alone applications like a compact mobile deuteron-beam accelerator up to a few MeV. (2)A large-acceptance high-gradient linac for accelerating low-energy muons in a strong solenoidal magnetic field. When a proton beam hits a target, many low-energy pions are produced almost isotropically, in addition to a small number of high-energy pions in the forward direction. We propose to collect and accelerate copious muons created as the low-energy pions decay. The acceleration should bring muons to a kinetic energy of {approx}200 MeV in about 10 m, where both an ionization cooling of the muon beam and its further acceleration in a superconducting linac become feasible. One potential solution is a normal-conducting linac consisting of independently fed 0-mode RF cavities with wide apertures closed by thin metal windows or grids. The guiding magnetic field is provided by external superconducting solenoids. The cavity choice, overall linac design considerations, and simulation results of muon acceleration are presented. Potential applications range from basic research to homeland defense to industry and medicine.
- OSTI ID:
- 21513376
- Journal Information:
- AIP Conference Proceedings, Vol. 1336, Issue 1; Conference: CAARI 2010: 21. International Conference on the Application of Accelerators in Research and Industry, Fort Worth, TX (United States), 8-13 Aug 2010; Other Information: DOI: 10.1063/1.3586052; (c) 2011 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACCELERATION
APERTURES
BEAM DYNAMICS
BYPASSES
DESIGN
DEUTERON BEAMS
DRIFT TUBES
EFFICIENCY
FOCUSING
H-MODE PLASMA CONFINEMENT
IMPEDANCE
IONIZATION
KINETIC ENERGY
LIGHT IONS
MAGNETIC FIELDS
METALS
MEV RANGE 01-10
MEV RANGE 100-1000
MONTE CARLO METHOD
MUON BEAMS
MUONS
NATIONAL DEFENSE
PERMANENT MAGNETS
PIONS
PROTON BEAMS
QUADRUPOLE LINACS
QUADRUPOLES
RESONATORS
SIMULATION
SOLENOIDS
SUPERCONDUCTING MAGNETS
THERMAL STRESSES
VELOCITY
ACCELERATORS
BEAMS
BOSONS
CALCULATION METHODS
CHARGED PARTICLES
CONFINEMENT
DYNAMICS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY RANGE
EQUIPMENT
FERMIONS
HADRONS
ION BEAMS
IONS
LEPTON BEAMS
LEPTONS
LINEAR ACCELERATORS
MAGNETIC CONFINEMENT
MAGNETS
MECHANICS
MESONS
MEV RANGE
MULTIPOLES
NUCLEON BEAMS
OPENINGS
PARTICLE BEAMS
PLASMA CONFINEMENT
PSEUDOSCALAR MESONS
STRESSES
SUPERCONDUCTING DEVICES