Title :
Closed-orbit drifts in HERA in correlation with ground motion
Author :
Shiltsev, V. ; Baklakov, B. ; Lebedev, P. ; Montag, C. ; Rossbach, J.
Author_Institution :
Inst. of Nucl. Phys., Novosibirsk, Russia
Abstract :
This article describes the results of orbit motion measurements in the HERA e-p collider. The power spectral density of vertical drifts of the HERA proton beam orbit was obtained in a frequency range from 6·10-5 Hz up to 250 Hz. The slow closed-orbit drifts were found to have a diffusive character and to grow as the square root of time interval. Simultaneous measurement of ground vibrations in the HERA tunnel has shown significant correlation of the orbit drifts with the ground motion. It was observed that the orbit motion substantially affects the proton loss rate
Keywords :
particle beam diagnostics; particle beam stability; proton accelerators; storage rings; vibrations; 0.00006 Hz; 250 Hz; HERA; closed-orbit drifts; ground motion; ground vibrations; orbit motion; proton beam orbit; proton loss rate; Collimators; Detectors; Distortion measurement; Extraterrestrial measurements; Frequency; Indium phosphide; Motion measurement; Particle beams; Protons; Vibration measurement;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505903
