Low-energy linac structure for PIGMI. [Pion generator for medical irradiations (PIGMI)]

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7256869

Swenson, D A; Stovall, J E

The higher radio frequency (450 MHz) and lower injection energy (250 keV) of the PIGMI (Pion Generator for Medical Irradiations) linac design seriously compound the problem of beam containment in the first few meters of the structure. The conventional quadrupole-focused, drift-tube linac represents the best solution for beam energies above 8 MeV, but because of the small space available for quadrupoles in the PIGMI designs, cannot provide the required focusing at lower energies. A satisfactory solution to this focusing problem has been found based on pure alternating phase focusing for the first few MeV, followed by a smooth transition to a pure permanent magnet quadrupole-focused structure at 8 MeV. The structure and its calculated performance are described.

• Research Organization: Los Alamos Scientific Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7256869
• Report Number(s): LA-UR-77-604; CONF-770313-2
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
ACCELERATORS
BEAM FOCUSING MAGNETS
BEAMS
DESIGN
LINEAR ACCELERATORS
MAGNETS
MEDICINE
MESON BEAMS
MULTIPOLES
NUCLEAR MEDICINE
PARTICLE BEAMS
PERFORMANCE
PHASE SHIFT
PION BEAMS
QUADRUPOLES
RADIOLOGY
RADIOTHERAPY
THERAPY