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@InProceedings{okada:icalepcs2019-wepha112,
author = {K. Okada and T. Fujiwara and T. Fukui and N. Hosoda and H. Maesaka and T. Maruyama and O. Morimoto and T. Ohshima and T. Okada and T. Sugimoto and Y. Tajiri and M. Yamaga},
% author = {K. Okada and T. Fujiwara and T. Fukui and N. Hosoda and H. Maesaka and T. Maruyama and others},
% author = {K. Okada and others},
title = {{Database Scheme for On-Demand Beam Route Switching Operations at SACLA/SPring-8}},
booktitle = {Proc. ICALEPCS'19},
pages = {1352--1355},
paper = {WEPHA112},
language = {english},
keywords = {operation, database, controls, storage-ring, FEL},
venue = {New York, NY, USA},
series = {International Conference on Accelerator and Large Experimental Physics Control Systems},
number = {17},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2020},
issn = {2226-0358},
isbn = {978-3-95450-209-7},
doi = {10.18429/JACoW-ICALEPCS2019-WEPHA112},
url = {https://jacow.org/icalepcs2019/papers/wepha112.pdf},
note = {https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA112},
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.},
}