Applications of a multiturn SPS orbit acquisition system

by Jukka KLEM (CERN)

Thursday 23 Mar 2000, 16:00 → 16:15 Europe/Zurich

SL Auditorium (CERN)

The SPS orbit acquisition system MOPOS can acquire beam positions from more than 200 beam position monitors (BPMs) around the SPS ring during 1000 or more consecutive turns. Two applications have been developed during 1999, to make it possible for the user to retrieve the multiturn data, and to assist in the analysis and in the graphical presentation of the data. These applications (Multiturn Measurement and Multiturn Analysis) are now available in the SPS Control Room. The multiturn system can be used to measure coherent betatron oscillations of the SPS beam, for instance after a kick given by a kicker magnet. By examining the beam behaviour at the different BPMs it is possible to obtain various kinds of information about the SPS accelerator. For instance, by looking at the amplitudes and phases of the beam oscillations at each BPM, one can find out errors in the lattice functions, or investigate the distribution of impedance around the SPS ring. The system can also be used to produce phase space plots and to locate beam losses. Results of such measurements performed at the SPS are presented.

Organiser(s): Werner Herr / SL Division

Note: Tea and coffee will be served at 15:30 in front of the Auditorium

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