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Fan, K.

Paper Title Page
MOPAN031 Design Study of a Very Large Aperture Eddy Current Septum for J-PARC 224
  • K. Fan, H. Kobayashi, H. Matsumoto, Y. Sakamoto
    KEK, Ibaraki
  An eddy current septum is selected as a backup of injection septum. Due to the high beam intensity and low beam energy, the injection beam size is very large. To accommodate the large size beam, large aperture septum is required. Large end field and large eddy current loss result in degradation of gap field. The paper discusses the eddy current loss effects on field distribution and introduces some correction methods.  
MOPAN032 Eddy Current Effects in an Opposite-field Septum 227
  • K. Fan, Y. Arakaki, I. Sakai
    KEK, Ibaraki
  A large aperture, thin septum, high field opposite-field septum magnet has been developed for the injection of 50GeV main ring of J-PARC. Due to the eddy current generated in septum conductor, magnet yoke and magnet end plate, the field distribution was degraded. In the paper, eddy current effects on both transverse field and longitudinal field distribution are calculated. Correction methods and experiment results are introduced.