大電流衝突型加速器KEKBにおける可動マスクの改良と今後の方向  [in Japanese] Experiences and Future Plans of Movable Mask System for the High Current Collider KEK B-factory  [in Japanese]

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Author(s)

Abstract

The movable mask is a special device for an accelerator that cuts off spent particles near the beam orbit and reduces background of the detector. For the KEKB, an electron/positron collider with two rings, sixteen movable masks had been installed for each ring. The originally designed masks, however, revealed severe troubles of heating, arcing and vacuum leaks at the stored beam currents of several hundreds mA. Several kinds of improved masks had been designed employing RF technologies and were installed to the ring step by step. The latest masks are working well except for the grooves on the mask head. Here the problems of movable masks so far are summarized and the structures of the latest movable masks and their status are presented.

Journal

  • Shinku

    Shinku 45(3), 157-160, 2002-03-20

    The Vacuum Society of Japan

References:  5

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    Cited by (3)

Codes

  • NII Article ID (NAID)
    10008202848
  • NII NACSIS-CAT ID (NCID)
    AN00119871
  • Text Lang
    JPN
  • Article Type
    SHO
  • ISSN
    05598516
  • NDL Article ID
    6144161
  • NDL Source Classification
    ZN15(科学技術--機械工学・工業--流体機械)
  • NDL Call No.
    Z16-474
  • Data Source
    CJP  NDL  J-STAGE 
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