Paper |
Title |
Page |
MOPAB102 |
Fast Orbit Response Matrix Measurements at ALBA |
365 |
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- Z. Martí, G. Benedetti, M. Carlà, J. Fraxanet, U. Iriso, J. Moldes, A. Olmos, R. Petrocelli
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
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At ALBA the standard orbit response matrix measurement with DC corrector magnet (CM) modulation is being upgraded with an AC excitation of the correctors combined with the synchronized beam position monitor (BPM) acquisition data rate at 10 kHz. Several types of excitation waveforms (sinusoidal vs square types) and frequencies have been tested and compared to optimize the measurement precision and repeatability. The data acquisition time of the ALBA response matrix (88 horizontal and 88 vertical correctors) with the new AC method takes 1 minute to complete instead of 7 minutes of the standard technique.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB102
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WEPAB071 |
Single Bunch Bucket Selection Injection Modes in the ALBA Storage Ring |
2744 |
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- R. Muñoz Horta, G. Benedetti, D. Lanaia, J. Moldes, F. Pérez, M. Pont, L. Torino
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
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The ALBA Synchrotron has been operating routinely in top-up mode since 2014, performing reinjections of multi-bunches every 20 minutes. Recently, the control of the timing has been upgraded to allow single bunches to be injected into any storage ring bucket and therefore to top up the stored current also in single bunch injector mode. In addition, by means of a specific algorithm, a new injection mode called Single Bunch Bucket Selection (SBBS) has been developed to provide any kind of filling pattern in the ALBA storage ring. This mode controls independently the amount of current injected into each bucket, and injects first into those buckets with lowest charge. When used in top-up mode, SBBS keeps the charge distribution of the filling pattern with a uniformity below 10%. The improved flexibility and stability of the filling pattern increases the scope of research for the ALBA experiments and for machine studies development. The implementation of the new injection modes and their performance are presented.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB071
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Export • |
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