Title :
Measurement of the variation of machine parameters and the effect of the power supplies ripple on the instantaneous tunes at SPEAR
Author :
Terebilo, A. ; Pellegrini, C. ; Cornacchia, M. ; Corbett, J. ; Martin, D.
Author_Institution :
California Univ., Los Angeles, CA, USA
Abstract :
For long term stability analysis, time variation of tunes is important. We have proposed and tested a technique for measuring the magnitude of this variation. This was made possible by using tune extraction algorithms that require small number of turns thus giving an instantaneous tune of the machine. In this paper we demonstrate the measured effect of the tune modulation with 60 Hz power supplies ripple, power line interference from the SLAC linac operating at 30 Hz repetition rate, and non-periodic variation
Keywords :
accelerator RF systems; electron accelerators; particle beam diagnostics; particle beam extraction; particle beam stability; storage rings; 30 Hz; 60 Hz; SPEAR; instantaneous tunes; long term stability; machine parameters variation measurement; nonperiodic variation; power line interference; power supplies ripple; tune extraction algorithms; tune modulation; tunes time variation; Data mining; Magnetic field measurement; Magnetic separation; Phase measurement; Power measurement; Power supplies; Power system harmonics; Stability analysis; Testing; Time measurement;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.750736
