Author: Tajiri, Y.
Paper Title Page
WEPHA112 Database Scheme for On-Demand Beam Route Switching Operations at SACLA/SPring-8 1352
  • K. Okada, N. Hosoda, T. Ohshima, T. Sugimoto, M. Yamaga
    JASRI, Hyogo, Japan
  • T. Fujiwara, T. Maruyama, T. Ohshima, T. Okada
    RIKEN SPring-8 Center, Hyogo, Japan
  • T. Fukui, N. Hosoda, H. Maesaka
    RIKEN SPring-8 Center, Innovative Light Sources Division, Hyogo, Japan
  • O. Morimoto, Y. Tajiri
    SES, Hyogo-pref., Japan
  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.
**IPAC2019 proceedings
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About • paper received ※ 01 October 2019       paper accepted ※ 09 October 2019       issue date ※ 30 August 2020  
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