Fukui, T.

Paper	Title	Page
TUB003	Event-Synchronized Data-Acquisition System for SPring-8 XFEL	69
	M. Yamaga, Y. Furukawa, T. Hirono, M. I. Ishii, T. Masuda, T. Ohata, R. Tanaka, A. Yamashita JASRI/SPring-8, Hyogo-ken T. Fukui, N. Hosoda RIKEN/SPring-8, Hyogo
	We report the status and the upgrade of the event-synchronized data-acquisition system for the accelerator control of XFEL/SPring-8. Because the XFEL is composed of a linac, most of the equipment is driven with the pulsed operation. The stability of equipment is critically important to achieve/stabilize the FEL lasing. We need a fast data-acquisition system to take a set of data from RF signals and beam monitor signals synchronizing with the same electron beam shots. For this purpose, the event-synchronized data-acquisition system has been introduced to the control system of the SCSS test accelerator, an XFEL prototype machine. The system consists of a data filling computer, a relational data base server, VME-based shared memory boards and distributed shared memory network. So far total of 54 signals from the beam monitoring system are successfully collected synchronizing with the 60 Hz of beam operation cycles. The accumulated data was utilized for the fast feedback correction of beam trajectories and energy quite effectively. Signals from the RF systems will be taken by the upgraded data-acquisition system utilizing the distributed memory-cache system.
TUC002	Recent Progress of RF and Timing System of XFEL/SPring-8	85
	H. Maesaka, T. Fukui, N. Hosoda, S. Matsubara, T. Ohshima, Y. Otake RIKEN/SPring-8, Hyogo M. Musha University of electro-communications, Tokyo K. Tamasaku RIKEN Spring-8 Harima, Hyogo
	For the XFEL facility at SPring-8, the acceleration rf is demanded to be transmitted for a long distance (~1km) and to be precisely controlled. The amplitude precision is 0.01 % and the phase precision is 0.1 degree of a 5712 MHz rf (50 fs timing accuracy). Therefore, we designed a stable optical timing and rf distribution system and a precise low-level rf control system. For the optical system, we employed a phase-stabilized optical fiber (PSOF) that has a very small temperature coefficient of 2 ppm/K. In addition, the fiber length is monitored by an optical interferometer and regulated by a variable delay line to reduce a remaining drift of PSOF. For the low-level rf system, we use an IQ modulator (demodulator) to generate (to detect) an acceleration rf signal. The baseband signals of the IQ modulator and demodulator are processed by 238MHz VME D/A and A/D converter boards, which have 14-bit and 12-bit resolutions, respectively. This system can manipulate the rf amplitude and phase with 0.01 % and 0.1 degree precision, respectively. These highly accurate instruments are very useful to other facilities.
	Slides
TUP067	Magnet Power Supply Control System Using i-DIO FPGA Program in a VME Filed Bus Card	236
	H. Takebe, T. Fukui, T. Hara, T. Otake, Y. Otake RIKEN/SPring-8, Hyogo K. Fukami, T. Masuda JASRI/SPring-8, Hyogo-ken
	A Control system for the XFEL/SPring-8 magnet power supply was designed by using an FPGA program in the "i-DIO" card. This card is modified of the VME field bus card "Opt-VME DIO". An output current deviation, monitoring ADC data from DAC current set value, is checked and makes an alarm signal. The ADC data can be averaged in some special sequences commanded by an upper workstation. A local control system of the power supply is also achieved by the i-DIO. Magnet power supply total system and test operations with the newly developed i-DIO card will be reported.
	Poster
TUP095	Facility Utility Control System of XFEL/SPring-8	298
	T. Masuda, M. I. Ishii, R. Tanaka JASRI/SPring-8, Hyogo-ken T. Fukui, N. Kumagai, Y. Sekiguchi RIKEN/SPring-8, Hyogo
	The XFEL facility under construction at SPring-8 requires highly stable RF phase and intensity control for steady X-ray lasing. The RF conditions are very sensitive to facility utilities and environmental conditions such as air temperature, power line voltage, especially to cooling water temperature for accelerating structures. We, therefore, have to monitor them with required sampling rate and resolution from the viewpoint of the accelerator control. In particular, the cooling water for accelerating structure should be controlled seamlessly from the XFEL control system to achieve steady lasing. We designed and constructed a control system for the facility utilities as a part of the XFEL accelerator control with the MADOCA framework. All the signals of the facility utilities are stored into the same database with the XFEL control system, which helps us to investigate the correlations between beam stability and environmental conditions. All the utility equipment is controlled by PLCs connected to VME systems through FL-net. We set up PLC touch panels to support daily management as the local control interface.
WEP046	Development of Undulator Control System for XFEL/SPring-8	492
	T. Otake, T. Fukui RIKEN/SPring-8, Hyogo T. Ohata JASRI/SPring-8, Hyogo-ken T. Tanaka RIKEN Spring-8 Harima, Hyogo
	We develop the prototype control system of XFEL/SPring-8　undulator and confirm the capability of the system. The XFEL consists of the 8GeV linear accelerator and the undulators. The undulator is important for lasing of the intense X-ray beam. For the lasing, the required positioning accuracy of the undulator gap is less than 1 micrometer. We have to control the undulator gap to be less than sub-micrometer resolution. To realize, we control the undulators by the periodic feedback with the linear encoders. In this paper, we will describe detail design of the undulator control system on XFEL.
	Poster
WEP096	Design of the Accelerator Safety Interlock System for XFEL in SPring-8	588
	M. Kago, T. Matsushita, N. Nariyama, C. Saji, R. Tanaka JASRI/SPring-8, Hyogo-ken Y. Asano, T. Fukui, T. Itoga RIKEN/SPring-8, Hyogo
	The X-ray Free Electron Laser (XFEL) Facility in SPring-8 is now under construction. The accelerator safety interlock system for the XFEL is required for protecting persons from radiation hazard. The system consists of three interlock systems; a central interlock system (CIS), an emergency interlock system (EIS) and a beam-route interlock system (BIS). The CIS monitors the safety equipment status. The EIS monitors status of emergency stop buttons. The BIS monitors consistency between the predefined electron beam route to the downstream insertion devices and the actual transport route by inputting the current of the bending magnet at the beam switching points. If the condition is unsafe, these systems don't give the permission to the accelerator operation and stops the electron beam. The programmable logic controller (PLC) is basically used to control of each interlock system. It is required to stop the electron beam within 16.6ms because the design maximum repetition frequency of the electron beams is 60Hz. Therefore, we developed the optical module that can transmit high-speed stop signals. We report the present status of accelerator safety interlock system for the XFEL.
	Poster
THP050	RF Test Stand Control System for XFEL/SPring-8	762
	T. Fukui, T. Hasegawa, N. Hosoda, H. Maesaka, T. Ohshima, Y. Otake, K. Shirasawa RIKEN/SPring-8, Hyogo T. Masuda, T. Morinaga, T. Ohata, S. Takahashi, M. Yamaga, A. Yamashita JASRI/SPring-8, Hyogo-ken
	The X-ray free electron laser (XFEL) facility is under construction at SPring-8. An rf test stand was build for the XFEL to assure performance of the delivered rf components under the high-power condition and to establish a conditioning procedure for stable operation with design rf power. In addition, the test stand is used to confirm a performance of a low-level rf system, a precise water temperature control system, a vacuum system and an rf high power system. In this paper we describe a software framework to control those equipment and test results of a newly developed software component include device drivers with Solaris 10 for x86.