Characterization and monitoring of transverse beam tails

Conference · Wed May 01 04:00:00 EDT 1991

OSTI ID:5550603

Seeman, J T; Decker, F J; Hsu, I; Young, C

Low emittance electron beams accelerated to high energy in a linac experience transverse effects (wakefield, filamentation, optics) which produce non-Gaussian projected transverse beam distributions. Characterizations of the beam shapes are difficult because the shapes are asymmetric and change with betatron phase. In this note several methods to describe beam distributions are discussed including an accelerator physics model of these tails. The uses of these characterizations in monitoring the beam emittances in the SLC are described in this paper. First, two dimensional distributions from profile monitor screens are reviewed showing correlated tails. Second, a fitting technique for non-Gaussian one dimensional distributions is used to extract the core from the tail areas. Finally, a model for tail propagation in the linac is given. 3 refs., 6 figs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5550603
• Report Number(s): SLAC-PUB-5440; CONF-910505--301; ON: DE91014553
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATOR FACILITIES
ACCELERATORS
BEAM DYNAMICS
BEAM EMITTANCE
BEAM MONITORING
BEAM PROFILES
BEAMS
BETATRON OSCILLATIONS
ELECTRON BEAMS
LEPTON BEAMS
LINEAR ACCELERATORS
MONITORING
OSCILLATIONS
PARTICLE BEAMS
STANFORD LINEAR COLLIDER