Author: Tongu, H.
Paper Title Page
SUPB024 Development of Permanent Magnet Focusing System for Klystrons 62
 
  • Y. Fuwa, Y. Iwashita, H. Tongu
    Kyoto ICR, Uji, Kyoto, Japan
  • S. Fukuda, S. Michizono
    KEK, Ibaraki, Japan
 
  The Distributed RF System (DRFS) for the International Linear Collider (ILC) requires thousands of klystrons. The failure rate of the power supply for solenoid focusing coil of each klystron may be a critical issue for a regular operation of the ILC. A permanent magnet beam focusing system can increase reliability and eliminate their power consumption. Since the required magnetic field is not high in this system, inexpensive anisotropic ferrite magnets can be used instead of magnets containing rare earth materials. In order to prove its feasibility, a test model of a permanent magnet focusing beam system is constructed and a power test of the klystron for DRFS with this model is under preparation. The results of magnetic field distribution measurement and the power test will be presented.  
 
MOPLB07 Non-destructive Inspections for SC Cavities 156
 
  • Y. Iwashita, Y. Fuwa, M. Hashida, K. Otani, S. Sakabe, S. Tokita, H. Tongu
    Kyoto ICR, Uji, Kyoto, Japan
  • H. Hayano, K. Watanabe, Y. Yamamoto
    KEK, Ibaraki, Japan
 
  Non-destructive Inspections play important roles to improve yield in production of high-performance SC Cavities. Starting from the high-resolution camera for inspection of the cavity inner surface, high resolution T-map, X-map and eddy current scanner have been developed. We are also investigating radiography to detect small voids inside the Nb EBW seam, where the target resolution is 0.1 mm. We are carrying out radiography tests with X-rays induced from an ultra short pulse intense laser. Recent progress will be presented.  
slides icon Slides MOPLB07 [5.810 MB]  
 
MOPB053 Non-destructive Inspections for SC Cavities 294
 
  • Y. Iwashita, Y. Fuwa, M. Hashida, K. Otani, S. Sakabe, S. Tokita, H. Tongu
    Kyoto ICR, Uji, Kyoto, Japan
  • H. Hayano, K. Watanabe, Y. Yamamoto
    KEK, Ibaraki, Japan
 
  Non-destructive Inspections play important roles to improve yield in production of high-performance SC Cavities. Starting from the high-resolution camera for inspection of the cavity inner surface, high resolution T-map, X-map and eddy current scanner have been developed. We are also investigating radiography to detect small voids inside the Nb EBW seam, where the target resolution is 0.1 mm. We are carrying out radiography tests with X-rays induced from an ultra short pulse intense laser. Recent progress will be presented.  
 
TUPLB12 Development of Permanent Magnet Focusing System for Klystrons 470
 
  • Y. Fuwa, Y. Iwashita, H. Tongu
    Kyoto ICR, Uji, Kyoto, Japan
  • S. Fukuda, S. Michizono
    KEK, Ibaraki, Japan
 
  The Distributed RF System (DRFS) for the International Linear Collider (ILC) requires thousands of klystrons. The failure rate of the power supply for solenoid focusing coil of each klystron may be a critical issue for a regular operation of the ILC. A permanent magnet beam focusing system can increase reliability and eliminate their power consumption. Since the required magnetic field is not high in this system, inexpensive anisotropic ferrite magnets can be used instead of magnets containing rare earth materials. In order to prove its feasibility, a test model of a permanent magnet focusing beam system is constructed and a power test of the klystron for DRFS with this model is under preparation. The results of magnetic field distribution measurement and the power test will be presented.  
slides icon Slides TUPLB12 [1.357 MB]  
 
TUPB090 Development of Permanent Magnet Focusing System for Klystrons 669
 
  • Y. Fuwa, Y. Iwashita, H. Tongu
    Kyoto ICR, Uji, Kyoto, Japan
  • S. Fukuda, S. Michizono
    KEK, Ibaraki, Japan
 
  A permanent magnet focusing system for klystrons is under development to improve reliability of RF supply system and reduce power consumption. To save production cost, anisotropic ferrite magnets are used in this system. A test model has been fabricated and the power test of a 750 kW klystron with this focusing magnet is carried out. 60 % of the nominal output power has been achieved at a preliminary power test so far