Title :
Helium Flow Induced Orbit Jitter at RHIC
Author :
Montag, C. ; He, P. ; Jia, L. ; Nicoletti, A. ; Satogata, T. ; Schmalzle, J. ; Tallerico, T.
Author_Institution :
Brookhaven National Laboratory, Upton, NY 11973, USA
Abstract :
Horizontal beam orbit jitter at frequencies around 10 Hz has been observed in RHIC for several years. The distinct frequencies of this jitter have been found at superconducting low-beta quadrupole triplets around the ring, where they coincide with mechanical modes of the cold masses. Recently, we have identified liquid helium flow as the driving force of these oscillations.
Keywords :
Extraterrestrial measurements; Frequency; Helium; Jitter; Laboratories; Magnetic shielding; Pressure measurement; Superconducting magnets; Valves; Vibrations;
Conference_Titel :
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the
Print_ISBN :
0-7803-8859-3
DOI :
10.1109/PAC.2005.1591433
