Title :
Observation of Beam-Beam Effects in PETRA
Author_Institution :
Deutsches Elektronen-Synchrotron DESY Hamburg, Germany
fDate :
6/1/1979 12:00:00 AM
Abstract :
The limitation of beam currents in PETRA by the beam-beam effect is investigated. The horizontal and vertical betatron frequency shifts ¿Q are measured as a function of bunch currents for different operating conditions. The direct measurement of ¿Q by coherent excitation of the eigenmodes of the coupled betatron oscillations of the bunches is described. This method allows to determine independently the horizontal and vertical beam dimensions at the interaction point.
Keywords :
Current measurement; Electrons; Electrostatics; Flip-flops; Frequency measurement; Monitoring; Resonance; Resonant frequency; Space charge; TV;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1979.4330764
