An automated focal point positioning and emittance measurement procedure for the interaction point of the SLC

Conference · Tue Aug 01 04:00:00 EDT 1989

OSTI ID:5843740

Phinney, N; Bambade, P; Kozanecki, W; Koska, W

To achieve maximum luminosity at the SLC, both the electron and positron beams must reach their minimum transverse size within 1 mm of the longitudinal location where the two bunches collide. This paper describes an automated procedure for positioning the focal point of each beam at this collision plant. The technique is based on measurements of the beam size utilizing either secondary emission or bremsstrahlung signals from carbon fibers a few microns in diameter. We have achieved simultaneous and reproducible measurements of the angular speed (/approximately/200 /mu/rad) and the optimum beam spot size (/approximately/2 /mu/m), which when combined yield measurements of the beam emittance consistent with those obtained using conventional profile monitor techniques. 8 refs., 5 figs., 1 tab.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5843740
• Report Number(s): SLAC-PUB-4920; CONF-890335-250; ON: DE89015629
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATOR FACILITIES
ACCELERATORS
AUTOMATION
BEAM BUNCHING
BEAM DYNAMICS
BEAM EMITTANCE
BEAM LUMINOSITY
BEAM POSITION
BEAM PROFILES
BEAM-BEAM INTERACTIONS
LINEAR ACCELERATORS
MEASURING METHODS
STANFORD LINEAR COLLIDER