Orbit control and beam-based alignment at RHIC

by Todd Satogata (Brookhaven National Laboratory (BNL), USA)

Tuesday 24 May 2005, 11:00 → 12:00 Europe/Zurich

SL Auditorium (CERN)

Successful implementation of beam-based alignment (BBA) algorithms, tailored to different types of magnets at RHIC, provides significant benefits to machine operations for heavy ions and polarized protons. We have performed quadrupole beam-based alignment to calibrate beam position monitor (BPM) centers relative to interaction region quadrupoles to maximize aperture during acceleration ramps and provide accurate steering in low-beta collision optics. This method was also used to investigate optimal transition jump orbit in strings of transition jump quadrupoles. BPM offsets in RHIC arcs, where quadrupole shunts are absent, were determined using sextupole BBA to maximize polarization efficiency through the RHIC polarized proton acceleration cycle. This talk summarizes techniques and results for the first application of these beam-based alignment techniques at RHIC in 2005.



Organiser(s): Werner Herr / CERN-AB/ABP
More information: http://cern.ch/AB-seminar/

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