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Title: Small Aperture BPM to Quadrupole Assembly Tolerance Study

Technical Report ·
DOI:https://doi.org/10.2172/1000324· OSTI ID:1000324

The LCLS injector and linac systems utilize a series of quadrupole magnets with a beam position monitor (BPM) captured in the magnet pole tips. The BPM measures the electron beam position by comparing the electrical signal from 4 electrodes and interpolating beam position from these signals. The manufacturing tolerances of the magnet and BPM are critical in determining the mechanical precision of the electrodes relative to the nominal electron beam Z-axis. This study evaluates the statistical uncertainty of the electrodes center axis relative to the nominal electron beam axis.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-76SF00515
OSTI ID:
1000324
Report Number(s):
SLAC-TN-10-075; TRN: US1100086
Country of Publication:
United States
Language:
English