Title :
Induced beam oscillations from quadrupole vibrations in the SLC linac
Author :
Seeman, J.T. ; Holtzapple, R.L. ; Ross, M.C.
Author_Institution :
Stanford Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
Linac beams in the Stanford Linear Collider (SLC) were driven into oscillation by transverse vibration of lattice quadrupoles at about 7 Hz. These quadrupoles are centered on 12-meter support girders located early in the linac. The vibrations were caused by ground motion at the 0.06 μm level which was amplified in the accelerator supports up to 5 μm. Seismic and support vibration measurements were Fourier analyzed and a strong correlation with beam observations was observed. Subsequent modifications of the supports have eliminated these oscillations
Keywords :
electron accelerators; linear accelerators; particle beam diagnostics; vibrations; 7 Hz; SLC; beam oscillations; ground motion; quadrupole vibrations; Damping; Frequency; Lattices; Linear particle accelerator; Particle beams; Position measurement; Positrons; Power supplies; Structural beams; Vibration measurement;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309718
