Small Aperture BPM to Quadrupole Assembly Tolerance Study

[摘要] 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.

[发布日期] 2010-12-07 [发布机构] SLAC National Accelerator Laboratory

[关键词] Light Sources;Xfel;Data Covariances Xfel;43 Particle Accelerators;Quadrupoles