Author: Furukawa, K.
Paper Title Page
MOBAUST05 Control System Achievement at KEKB and Upgrade Design for SuperKEKB 17
  • K. Furukawa, A. Akiyama, E. Kadokura, M. Kurashina, K. Mikawa, F. Miyahara, T.T. Nakamura, J.-I. Odagiri, M. Satoh, T. Suwada
    KEK, Ibaraki, Japan
  • T. Kudou, S. Kusano, T. Nakamura, K. Yoshii
    MELCO SC, Tsukuba, Japan
  • T. Okazaki
    EJIT, Hitachi, Ibaraki, Japan
  SuperKEKB electron-positron asymmetric collider is being constructed after a decade of successful operation at KEKB for B physics research. KEKB completed all of the technical milestones, and had offered important insights into the flavor structure of elementary particles, especially the CP violation. The combination of scripting languages at the operation layer and EPICS at the equipment layer had led the control system to successful performance. The new control system in SuperKEKB will continue to employ those major features of KEKB, with additional technologies for the reliability and flexibility. The major structure will be maintained especially the online linkage to the simulation code and slow controls. However, as the design luminosity is 40-times higher than that of KEKB, several orders of magnitude higher performance will be required at certain area. At the same time more controllers with embedded technology will be installed to meet the limited resources.  
slides icon Slides MOBAUST05 [2.781 MB]  
MOPMS029 The BPM DAQ System Upgrade for SuperKEKB Injector Linac 389
  • M. Satoh, K. Furukawa, F. Miyahara, T. Suwada
    KEK, Ibaraki, Japan
  • T. Kudou, S. Kusano
    MELCO SC, Tsukuba, Japan
  The KEK injector linac provides beams with four different rings: a KEKB high-energy ring (HER; 8 GeV/electron), a KEKB low-energy ring (LER; 3.5 GeV/positron), a Photon Factory ring (PF; 2.5 GeV/electron), and an Advanced Ring for Pulse X-rays (PF-AR; 3 GeV/electron). For the three rings except PF-AR, the simultaneous top-up injection has been completed since April 2009. In the simultaneous top-up operation, the common DC magnet settings are utilized for the beams with different energies and amount of charges, whereas the different optimized settings of RF timing and phase are applied to each beam acceleration by using a fast low-level RF (LLRF) phase and trigger delay control up to 50 Hz. The non-destructive beam position monitor (BPM) is an indispensable diagnostic tool for the stable beam operation. In the KEK Linac, approximately nineteen BPMs with the strip-line type electrodes are used for the beam orbit measurement and feedback. In addition, some of them are also used for the beam energy feedback loops. The current DAQ system consists of the digital oscilloscopes (Tektronix DPO7104, 10 GSa/s). A signal from each electrode is analyzed with a predetermined response function up to 50 Hz. The beam position resolution of the current system is limited to about 0.1 mm because of ADC resolution. For the SuperKEKB project, we have a plan to upgrade the BPM DAQ system since the Linac should provide the smaller emittance beam. We will report on the system description of the new DAQ system and the results of performance test in detail.  
poster icon Poster MOPMS029 [3.981 MB]  
THDAULT05 Embedded LLRF Controller with Channel Access on MicroTCA Backplane Interconnect 1274
  • K. Furukawa, K. Akai, T. Kobayashi, S. Michizono, T. Miura, K. Nakanishi, J.-I. Odagiri
    KEK, Ibaraki, Japan
  • H. Deguchi, K. Hayashi, M. Ryoshi
    Mitsubishi Electric TOKKI Systems, Amagasaki, Hyogo, Japan
  A low-level RF controller has been developed for the accelerator controls for SuperKEKB, Super-conducting RF Test facility (STF) and Compact-ERL (cERL) at KEK. The feedback mechanism will be performed on Vertex-V FPGA with 16-bit ADCs and DACs. The card was designed as an advanced mezzanine card (AMC) for a MicroTCA shelf. An embedded EPICS IOC on the PowerPC core in FPGA will provide the global controls through channel access (CA) protocol on the backplane interconnect of the shelf. No other mechanisms are required for the external linkages. CA is exclusively employed in order to communicate with central controls and with an embedded IOC on a Linux-based PLC for slow controls.  
slides icon Slides THDAULT05 [1.780 MB]