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| Title | Database Scheme for On-Demand Beam Route Switching Operations at SACLA/SPring-8 | |
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| Abstract | At SACLA, the X-ray free electron laser (XFEL) facility, we have been operating the electron linac in time-sharing (equal duty) mode between beamlines. The next step is to vary the duty factor on an on-demand basis and to bring the beam into the SP8 storage ring. It is a part of a big picture of an upgrade*. The low-emittance beam is ideal for the next generation storage ring. In every 60 Hz repetition cycle, we have to deal a bunch of electrons properly. The challenge here is we must keep the beam quality for the XFEL demands while responding occasional injection requests from the storage ring**. This paper describes the database system that supports both SACLA/SP8 operations. The system is a combination of RDB and NoSQL databases. In the on-demand beam switching operation, the RDB part keeps the parameters to define sequences, which include a set of one-second route patterns, and a bucket sequence for the injection, etc. As for data analysis, it is going to be a post-process to build an event for a certain route, because not all equipment get the route command in real time. We present the preparation status toward the standard operation for beamline users. | |
| Footnotes & References | *http://rsc.riken.jp/pdf/SPring-8-II.pdf **IPAC2019 proceedings |
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| Paper | download WEPHA112.PDF [1.263 MB / 4 pages] | |
| Poster | download WEPHA112_POSTER.PDF [0.561 MB] | |
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |
| Conference | ICALEPCS2019 | |
| Series | International Conference on Accelerator and Large Experimental Physics Control Systems (17th) | |
| Location | New York, NY, USA | |
| Date | 05-11 October 2019 | |
| Publisher | JACoW Publishing, Geneva, Switzerland | |
| Editorial Board | Karen S. White (ORNL, Oak Ridge, TN, USA); Kevin A. Brown (BNL, Upton, NY, USA); Philip S. Dyer (BNL, Upton, NY, USA); Volker RW Schaa (GSI, Darmstadt, Germany) | |
| Online ISBN | 978-3-95450-209-7 | |
| Online ISSN | 2226-0358 | |
| Received | 01 October 2019 | |
| Accepted | 09 October 2019 | |
| Issue Date | 30 August 2020 | |
| DOI | doi:10.18429/JACoW-ICALEPCS2019-WEPHA112 | |
| Pages | 1352-1355 | |
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