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Sako, H.

Paper Title Page
MOPAN044 Development of Commissioning Software System for J-PARC LINAC 257
 
  • H. Sako
  • C. K. Allen
    KEK, Ibaraki
  • H. Ikeda
    Visual Information Center, Inc., Ibaraki-ken
  • G. B. Shen
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  
  Beam commissioning of J-PARC LINAC has been performed since November 2006. A commissioning software framework and a database system have been developed for the commissioning. We first discuss the LINAC control system, and then our commissioning software framework. Then, we discuss our strategy of comparing online/offline data and models in our system with monitors, magnets, and the RF system. Commissioning tools developed during the commissioning will be presented in detail.  
MOPAN028 Current Status of Virtual Accelerator at J-PARC 3 GeV Rapid Cycling Synchrotron 215
 
  • H. Harada
  • K. Furukawa
    KEK, Ibaraki
  • H. Hotchi, Y. Irie, F. Noda, H. Sako, H. Suzuki
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • S. Machida
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  • K. Shigaki
    Hiroshima University, Higashi-Hiroshima
  
  We have developed the logical accelerator called "Virtual Accelerator" based on EPICS for 3 GeV Rapid Cycling Synchrotron (RCS) in J-PARC. The Virtual Accelerator has a mathematical model of the beam dynamics in order to simulate the behavior of the beam and enables the revolutionary commissioning and operation of an accelerator. Additionally, we have constructed the commissioning tool based on the Virtual Accelerator. We will present a current status of the Virtual Accelerator system and some commissioning tool.  
MOPAN029 XAL Online Model Enhancements for J-PARC Commissioning and Operation 218
 
  • C. K. Allen
  • H. Ikeda
    Visual Information Center, Inc., Ibaraki-ken
  • M. Ikegami
    KEK, Ibaraki
  • T. Ohkawa
    JAEA, Ibaraki-ken
  • H. Sako, G. B. Shen
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • A. Ueno
    JAEA/LINAC, Ibaraki-ken
  
  Funding: Work supported by a KEK foreign visiting researcher grant

The XAL application development environment has been installed as a part of the control system for the Japan Proton Accelerator Research Center (J-PARC). XAL was initially developed at SNS and has been described at length in previous conference proceedings (e.g., Chu et. al. APAC07, Galambos et. al. PAC05, etc.). The fundamental tenet of XAL is to provide a consistent, high-level programming interface, along with a set of high-level application tools, all of which are independent of the underlying machine hardware. Control applications can be built that run at any accelerator site where XAL is installed. Of course each site typically has specific needs not supported by XAL and the framework was designed with this in mind: each institution can upgrade XAL which then is accessible to all users. We outline the upgrades and enhancements to the XAL online model necessary for accurate simulation of the J-PARC linac. For example, we have added permanent magnet quadrupoles and additional space charge capabilities such as off-centered and rotated beams and bending magnets with space charge. We present the physics models for the upgrades as well as the software architecture supporting them.

 
TUPAN043 RF Amplitude and Phase Tuning of J-PARC DTL 1481
 
  • M. Ikegami
  • H. Asano, T. Kobayashi
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • K. Hasegawa, T. Ito, T. Morishita, S. Sato, A. Ueno
    JAEA/LINAC, Ibaraki-ken
  • Z. Igarashi, H. Tanaka
    KEK, Ibaraki
  • H. Sako
    JAEA, Ibaraki-ken
  
  The beam commissioning of J-PARC linac has been started in November 2006. In the beam commissioning, the tuning of the RF phase and amplitude for its DTL (Drift Tube Linac) has been performed with a phase-scan method. Detailed results of the RF tuning are presented with a brief discription of the tuning procedure.  
TUPAN062 RF Amplitude and Phase Tuning of J-PARC SDTL 1529
 
  • G. B. Shen
  • H. Sako
    JAEA, Ibaraki-ken
  • S. Sato
    JAEA/LINAC, Ibaraki-ken
  
  In the beam commissioning of J-PARC Linac, RF phase and amplitude of SDTL (Separate-type Drift Tube Linac) cavities have been tuned with a phase-scan method based on the beam-energy measurement. The output beam energy is measured with two FCTs (Fast Current Transformer) using the TOF (Time-Of-Flight) method. The detailed results of RF tuning for SDTL cavity is presented.  
FRPMN045 Beam Position Monitor and its Calibration in J-PARC LINAC 4072
 
  • S. Sato
  • H. Akikawa, Z. Igarashi, N. Kamikubota, S. Lee
    KEK, Ibaraki
  • M. Ikegami
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • H. Sako, G. B. Shen
    JAEA, Ibaraki-ken
  • T. Tomisawa, A. Ueno
    JAEA/LINAC, Ibaraki-ken
  
  The beam commissioning of J-PARC linac has been started in November 2006. Beam Position Monitors (BPMs) which have been calibrated on the bench setup with a scanning wire, utilize beam based calibration to relate the BPM center and the center of Q magnet. In this presentation, detail of installed BPM and the calibration methods are described.  
THPAN043 Comparison of Trajectory Between Modeling and Experiment for J-PARC Linac 3324
 
  • T. Ohkawa
  • H. Ao, A. Ueno
    JAEA/LINAC, Ibaraki-ken
  • K. Hasegawa
    JAEA, Ibaraki-ken
  • M. Ikegami
    KEK, Ibaraki
  • H. Sako
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  
  In the beam commissioning of J-PARC (Japan Proton Accelerator Research Complex) linac, three simulations codes are used to model the accelerator. We have compared with the experimental results obtained in the beam commissioning to date, where a basic agreement has been confirmed between the modeling and the actual beam behavior.