Precise system stabilization at SLC using dither techniques

Conference · Thu Apr 01 04:00:00 EST 1993

OSTI ID:10186251

Ross, M C; Hendrickson, L; Himel, T; Miller, E

A data acquisition method has been developed at the SLAC Linear Collider (SLC) that provides accurate beam parameter information using sub-tolerance excitation and synchronized detection. This is being applied to several SLC sub-systems to provide high speed feedback on beam parameters such as linac output energy spread. The method has significantly improved control of the linac energy spread. The linac average phase offset ({phi}), used to compensate the effects of longitudinal wakefields, is adjusted {plus_minus}1 control bit (about 0.18{degree} S-band or 20% of tolerance), in a continuous fashion. Properly coordinated beam energy measurements provide a measure of the derivative of the accelerating voltage (dE/d{phi}). The position of the beam on the RF wave can thus be determined to {plus_minus} 0.3{degree} in about 5 seconds. The dithering does not contribute significantly to the energy jitter of the SLC and therefore does not adversely affect routine operation. Future applications include control of the interaction region beam size and orientation.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 10186251
• Report Number(s): SLAC-PUB--6102; CONF-930511--416; ON: DE93040951
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200
BEAM DYNAMICS, FIELD CALCULATIONS, AND ION OPTICS
BEAM EMITTANCE
BEAM LUMINOSITY
DATA ACQUISITION SYSTEMS
FEEDBACK
OPTIMIZATION
STABILIZATION
STANFORD LINEAR COLLIDER