Proposed bunching scheme for a polarized H/sup -/ injector

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5526648

Swain, G R; Browman, A A

Improvements to the polarized H/sup -/ injector at LAMPF will include a two-stage buncher and beam chopper. The buncher scheme will permit the compression of a major part of the current in 20 rf cycles of the drift-tube linac (100 nsec) into a single rf cycle (5 nsec), thus making possible time-of-flight experiments with the polarized H/sup -/ beam. A proposed first buncher stage would use a ramp drive waveform; the second stage, a sinusoidal waveform. Design and sensitivity calculations are summarized, including beam energy considerations, buncher and chopper drive requirements, and longitudinal and transverse beam dynamics. The calculations indicate that about 70% of the beam from the source may be bunched in the 1-nsec acceptance region of the linac, with less than 0.1% of the beam in neighboring rf cycles. 5 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5526648
• Report Number(s): LA-UR-85-1640; CONF-850504-48; ON: DE85012648
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430302* -- Particle Accelerators-- Injection & Extraction Systems
ACCELERATORS
BEAM BUNCHERS
BEAM BUNCHING
BEAM DYNAMICS
BEAM INJECTION
BEAMS
DESIGN
HYDROGEN 1 MINUS BEAMS
ION BEAMS
LAMPF LINAC
LINEAR ACCELERATORS
MESON FACTORIES
POLARIZED BEAMS