Effect of Triplet Magnet Vibrations on RHIC Performance with High Energy Protons

Download or read book Effect of Triplet Magnet Vibrations on RHIC Performance with High Energy Protons written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report we present recent experimental data from the Relativistic Heavy Ion Collider (RHIC) illustrating effects resulting from ≈10 Hz vibrations of the triplet quadrupole magnets in the interactions regions and evaluate the impact of these vibrations on RHIC collider performance. Measurements revealed modulation of the betatron tunes of appreciable magnitude relative to the total beam-beam parameter. Comparison of the discrete frequencies in the spectra of the measured beam positions and betatron tunes confirmed a common source. The tune modulations were shown to result from feed-down in the sextupole magnets in the interaction regions. In addition we show that the distortions to the closed orbit of the two counter-rotating beams produced a modulated crossing angle at the interaction point(s).