| Title |
Characterising the Signal Processing System for Beam Position Monitors at the Front End Test Stand |
| Authors |
- G.E. Boorman, S.M. Gibsonpresenter, N. Rajaeifar
Royal Holloway, University of London, Surrey, United Kingdom
- J.D. Gale
University of Sussex, Brighton, United Kingdom
- S. Jolly
UCL, London, United Kingdom
- S.R. Lawrie
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
- A.P. Letchford
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
- J.K. Pozimski
Imperial College of Science and Technology, Department of Physics, London, United Kingdom
|
| Abstract |
A number of beam position monitors are being installed at the Front End Test Stand H⁻ ion source at the Rutherford Appleton Laboratory, UK, as part of the 3 MeV medium energy beam transport. The FETS ion source delivers pulses up to 2 ms long at a rate up to 50 Hz and a maximum current of 60 mA, with a 324 MHz micro-bunch structure imposed by the frequency of the FETS RF acceleration cavity. The response of an in-house designed button BPM has been simulated and then characterised on a wire-based test-rig and the results are presented. The output from a custom algorithm running on a commercial PXI-based FPGA signal processing system is evaluated using test signals from both a function generator and the BPM in the test-rig, to verify the speed and precision of the processing algorithm. The processing system can determine the beam position in eight BPMs, with a precision of better than 20 microns, within one microsecond of the signal sampling being completed. Work is ongoing to reduce the processing time to below 300 ns.
|
| Paper |
download TUPB073.PDF [0.680 MB / 4 pages] |
| Poster |
download TUPB073_POSTER.PDF [0.552 MB] |
| Conference |
IBIC2015, Melbourne, Australia |
| Series |
International Beam Instrumentation Conference (4th) |
| Proceedings |
Link to full IBIC2015 Proccedings |
| Session |
Poster Session 2 |
| Date |
15-Sep-15 16:00–18:00 |
| Main Classification |
BPMs and Beam Stability |
| Keywords |
FPGA, electronics, ion, LabView, operation |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Mark Boland (SLSA, Clayton, Australia); David Button (ANSTO, Menai, Australia); Kathleen Riches (SLSA, Clayton, Australia); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-176-2 |
| Published |
January 2016 |
| Copyright |
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