| Title |
FRIB Fast Machine Protection System: Engineering for Distributed Fault Monitoring System and Light Speed Response |
| Authors |
- Z. Li, L.R. Dalesio, M. Ikegami, S.M. Lidia, L. Wang, S. Zhao
FRIB, East Lansing, USA
|
| Abstract |
The Facility for Rare Isotope Beams (FRIB), a high-power, heavy ion facility, can accelerate beam up to 400 kW power with kinetic energy ≥ 200 MeV/u. Its fast protection system is required to detect failure and remove beam within 35 μs to prevent damage to equipment. The fast protection system collects OK/NOK inputs from hundreds of devices, such as low level RF controllers, beam loss monitors, and beam current monitors, which are distributed over 200 m. The engineering challenge here is to design a distributed control system to collect status from these devices and send out the mitigation signals within 10 μS timing budget and also rearm for the next pulse for 100 Hz beam (10 mS). This paper describes an engineering solution with a master-slave structure adopted in FRIB. Details will be covered from system architecture to FPGA hardware platform design and from communication protocols to physical interface definition. The response time of ~9.6μS from OK/NOK inputs to mitigation outputs is reached when query method is used to poll the status. A new approach is outlined to use bi-direction loop structure for the slave chain and use streaming mode for data collection from slave to master, ~3μS response time are expected from this engineering optimization.
|
| Funding |
Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 |
| Paper |
download THPLR046.PDF [0.358 MB / 3 pages] |
| Poster |
download THPLR046_POSTER.PDF [1.872 MB] |
| Export |
download ※ BibTeX
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※ EndNote |
| Conference |
LINAC2016, East Lansing, MI, USA |
| Series |
Linear Accelerator Conference (28th) |
| Proceedings |
Link to full LINAC2016 Proccedings |
| Session |
Poster Session |
| Date |
29-Sep-16 16:00–17:00 |
| Main Classification |
4 Beam Dynamics, Extreme Beams, Sources and Beam Related Technology |
| Sub Classification |
4D Control System |
| Keywords |
status, network, FPGA, timing, linac |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Yoshishige Yamazaki (FRIB/MSU, East Lansing, MI, USA); Alberto Facco (FRIB/MSU, East Lansing, MI, USA); Amy McCausey (FRIB/MSU, East Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-169-4 |
| Published |
May 2017 |
| Copyright |
|
