|WEPHA112||Database Scheme for On-Demand Beam Route Switching Operations at SACLA/SPring-8||1352|
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.
|Poster WEPHA112 [0.561 MB]|
|DOI •||reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA112|
|About •||paper received ※ 01 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020|
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