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| WEPD23 |
Commissioning of the ALBA Fast Orbit Feedback System |
feedback, injection, FPGA, controls |
691 |
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- A. Olmos, S. Blanch-Torné, G. Cuní, Z. Martí, J. Moldes, R. Petrocelli, S. Rubio-Manrique, X. Serra-Gallifa, D. Yépez
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
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The ALBA Fast Orbit FeedBack system (FOFB) started its commissioning phase in September 2013, when all the required hardware was installed and the development of different controls for the feedback started. This report shows our experience tuning the different parameters to setup the system, together with vibration and beam noise measurements at different conditions. Finally, the present results and future steps for this system are described.
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Poster WEPD23 [0.902 MB]
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| WEPD25 |
Upgrade Development Progress for the CERN SPS High Bandwidth Transverse Feedback Demonstrator System |
feedback, controls, pick-up, timing |
700 |
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- J.E. Dusatko, J.M. Cesaratto, J.D. Fox, C.H. Rivetta
SLAC, Menlo Park, California, USA
- S. De Santis
LBNL, Berkeley, California, USA
- W. Höfle
CERN, Geneva, Switzerland
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Funding: Work supported by the U.S. Department of Energy under contract DE-AC02-76SF00515 and the US LHC Accelerator Research Program (LARP)
A high bandwidth feedback demonstrator system has been developed for proof of concept transverse intra-bunch closed loop feedback control studies at the CERN SPS. This system contains a beam pickup, analog front end receiver, signal processor, back end driver, power amplifiers and kicker structure. The main signal processing functions are performed digitally, using very fast (4GSa/s) data converters to bring the system signals into and out of the digital domain. The digital signal processing function is flexibly implemented in an FPGA allowing for maximum speed and reconfigurability for testing multiple control algorithms. The signal processor is a modular design consisting of commercial and custom components. This approach allowed for a rapidly-developed prototype to be delivered in a short time with limited resources. Initial beam studies at the SPS using the system prior to the CERN long shutdown one (LS1) have been very encouraging. We are planning several key upgrades to the system, including the signal processor. This paper describes these upgrades and reports on their progress.
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Poster WEPD25 [1.301 MB]
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| WEPD27 |
Commissioning of Bunch-by-Bunch Feedback System for NSLS2 Storage Ring |
ion, feedback, storage-ring, betatron |
707 |
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- W.X. Cheng, B. Bacha, Y. Hu, O. Singh, H. Xu
BNL, Upton, Long Island, New York, USA
- D. Teytelman
Dimtel, San Jose, USA
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NSLS2 Storage Ring transverse bunch by bunch feedback system has been designed to cure the coupled bunch instabilities, caused by HOM, resistive wall or ions. The system has been constructed, tested and commissioned with beam. Preliminary studies show that the feedback system can suppress single bunch instability. Mode analysis of the unstable coupled bunch motion reveals fast ion instability exist even at relative low current. The bunch by bunch feedback system performance will be presented in this paper.
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Poster WEPD27 [0.623 MB]
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