Permanent-magnet quadrupoles in an RFQ linacs

Conference · Tue Jan 01 00:00:00 EST 1985

DOI:https://doi.org/10.1109/TNS.1985.4333987· OSTI ID:5674021

Lysenko, W P; Wang, T F

We investigated the possibility of increasing the current-carrying capability of radio-frequency quadrupole (RFQ) linear accelerators by adding permanent-magnet quadrupole (PMQ) focusing to the existing transverse focusing provided by the rf electric field. Increased transverse focusing would also allow shortening RFQ linacs by permitting a larger accelerating gradient, which is normally accomplished by an undesirable increased transverse rf defocusing effect. We found that PMQs were not helpful in increasing the transverse focusing strength in an RFQ. This conclusion was reached after some particle tracing simulations and some analytical calculations. In our parameter regime, the addition of the magnets increases the betatron frequency but does not result in improved focusing because the increased flutter more than offsets the gain from the increased betatron frequency.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5674021
• Report Number(s): LA-UR-85-1336; CONF-850504-25; ON: DE85011283
• Resource Relation: Journal Volume: 32; Journal Issue: 5; Conference: Particle accelerator conference, Vancouver, Canada, 13 May 1985
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM FOCUSING MAGNETS
COMPUTERIZED SIMULATION
QUADRUPOLE LINACS
BEAM OPTICS
PERMANENT MAGNETS
THEORETICAL DATA
ACCELERATORS
DATA
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
INFORMATION
LINEAR ACCELERATORS
MAGNETS
NUMERICAL DATA
SIMULATION
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics