| Title |
Architecture of Transverse Multi-Bunch Feedback Processor at Diamond |
| Authors |
- M.G. Abbott, G. Rehm, I.S. Uzunpresenter
DLS, Oxfordshire, United Kingdom
|
| Abstract |
We describe the detailed internal architecture of the Transverse Multi-Bunch Feedback processor used at Diamond for control of multi-bunch instabilities and measurement of betatron tunes. Bunch by bunch selectable control over feedback filters, gain and excitation allows fine control over feedback, allowing for example the single bunch in a hybrid or camshaft fill pattern to be controlled independently from the bunch train. It is also possible to excite all bunches at a single frequency while simultaneously sweeping the excitation for tune measurement of a few selected bunches. The single frequency excitation has been used for continuous measurement of the beta-function. A simple programmable event sequencer provides support for up to 7 steps of programmable sweeps and changes to feedback and excitation, allowing a variety of complex and precisely timed beam characterisation experiments including grow-damp measurements in unstable conditions and programmed bunch cleaning. Finally input and output compensation filters allow for correction of front end and amplifier phasing at higher frequencies.
|
| Paper |
download MOPGF097.PDF [0.118 MB / 4 pages] |
| Poster |
download MOPGF097_POSTER.PDF [0.251 MB] |
| Conference |
ICALEPCS2015, Melbourne, Australia |
| Series |
International Conference on Accelerator and Large Experimental Physics Control Systems (15th) |
| Proceedings |
Link to full ICALEPCS2015 Proccedings |
| Session |
Poster session |
| Date |
19-Oct-15 17:30–18:30 |
| Main Classification |
Feedback Systems, Tuning |
| Keywords |
feedback, controls, FPGA, EPICS, experiment |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Lou Corvetti (AS, Clayton, Australia); Kathleen Riches (SLSA, Clayton, Australia); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-148-9 |
| Published |
December 2015 |
| Copyright |
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