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Matsumoto, T.

Paper Title Page
MOP69 RF Control Modelling Issues for Future Superconducting Accelerators 180
  • A. Hofler, J. R. Delayen
    TJNAF, Newport News, Virginia
  • V. Ayvazyan, A. Brandt, S. Simrock
    DESY, Hamburg
  • T. Czarski
    WUT, Warsaw
  • T. Matsumoto
    KEK, Ibaraki
  The development of superconducting accelerators has reached a high level of maturity following the successes of ATLAS at Argonne, CEBAF at Jefferson Lab, the TESLA Test Facility at DESY and many other operational accelerators. As a result many new accelerators under development (e.g. SNS) or proposed (e.g. RIA) will utilize this technology. Covering all aspects from cw to pulsed rf and/or beam, non-relativistic to relativistic particles, medium and high gradients, light to heavy beam loading, linacs, rings, and ERLs, the demands on the rf control system can be quite different for the various accelerators. For the rf control designer it is therefore essential to understand these issues and be able to predict rf system performance based on realistic rf control models. This paper will describe the features that should be included in such models and present an approach which will drive the development of a generic rf system model.  
THP58 Development of C-band High-Power Mix-Mode RF Window 745
  • S. Michizono, S. Fukuda, T. Matsumoto, K. Nakao, T. Takenaka
    KEK, Ibaraki
  • K. Yoshida
    MELCO, Hyogo
  High power c-band (5712 MHz) rf system (40 MW, 2 μs, 50 Hz) is under consideration for the electron-linac upgrade aimed for the super KEKB project. An rf window, which isolates the vacuum and pass the rf power, is one of the most important components for the rf system. The window consists of a ceramic disk and a pill-box housing. The mix-mode rf window is designed so as to decrease the electric field on the periphery of the ceramic disk. A resonant ring is assembled in order to examine the high-power transmission test. The window was tested up to the transmission power of 160 MW. The rf losses are also measured during the rf operation.