Beam determination of quadrupole misalignments and beam position monitor biases in the SLC linac

Conference · Thu Sep 01 04:00:00 EDT 1988

OSTI ID:7010276

Lavine, T L; Seeman, J T; Atwood, W B; Himel, T M; Petersen, A; Adolphsen, C E

Misalignments of magnetic quadrupoles and biases in beam position monitors (BPMs) in the Stanford Linear Collider (SLC) linac can lead to a situation in which the beam is off-center in the disk-loaded waveguide accelerator structure. The off-center beam produces wakefields which can limit SLC performance by causing unacceptably large emittance growth. We present a general method for determining quadrupole misalignments and BPM biases in the SLC linac by using beam trajectory measurements. The method utilizes both electron and positron beams on opposite rf cycles in the same linac lattice to determine simultaneously magnetic quadrupole misalignments and BPM biases. The two-beam trajectory data may be acquired without interrupting SLC colliding beam operations. 2 refs., 5 figs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 7010276
• Report Number(s): SLAC-PUB-4720; CONF-881049-30; ON: DE89002393
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATOR FACILITIES
ACCELERATORS
ALIGNMENT
BEAM EMITTANCE
BEAM MONITORS
BEAM OPTICS
BEAM POSITION
CLOSED CONFIGURATIONS
LINEAR ACCELERATORS
MAGNETIC FIELD CONFIGURATIONS
MEASURING INSTRUMENTS
MONITORS
MULTIPOLAR CONFIGURATIONS
QUADRUPOLAR CONFIGURATIONS
STANFORD LINEAR COLLIDER
WAVEGUIDES