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Kumada, M.

Paper Title Page
THPMN006 Modification and Measurement of the Adjustable Permanent Magnet Quadrupole for the Final Focus in a Linear Collider 2719
 
  • Y. Iwashita, H. Fujisawa, M. Ichikawa, Y. Tajima
    Kyoto ICR, Uji, Kyoto
  • M. Kumada
    NIRS, Chiba-shi
  • S. Kuroda, T. Okugi, T. Tauchi
    KEK, Ibaraki
  • C. M. Spencer
    SLAC, Menlo Park, California
  
  Funding: This research was partially supported by JSPS, Grant-in-Aid for Scientific Research, 14204023-2002, 18204023-2006 and the U. S. DOE under contract DE-AC02-76SF00515.

An adjustable permanent magnet quadrupole has been developed for the final focus in an electron-positron linear collider. The design has two concentric rings of permanent magnets. Recent activities include a newly fabricated inner ring that demonstrates the strongest field gradient at a small bore diameter of 15mm and a new magnetic field measurement system based on a rotating coil. The prospects of the R&D will be discussed.