• DocumentCode
    345564
  • Title

    Improvement of cavity performance by electropolishing in the 1.3 GHz Nb superconducting cavities

  • Author

    Kako, E. ; Noguchi, S. ; Ono, M. ; Saito, K. ; Shishido, T. ; Aune, B. ; Charrier, J.-P. ; Juillard, M. ; Safa, H.

  • Author_Institution
    KEK, Tsukuba, Japan
  • Volume
    1
  • fYear
    1999
  • fDate
    1999
  • Firstpage
    432
  • Abstract
    A steep drop of the cavity quality factor (Q0) at high electric field has been observed frequently in chemically-polished and high-pressure-rinsed Saclay cavities, even in the absence of field emission. Three single-cell cavities from Saclay were tested at KEK following electropolishing and high pressure rinsing. This treatment eliminated the steep Q0 drop, the quench field increased to an accelerating gradient of more than 30 MV/m with a quality factor above 2×1010. No dependence of the quench field on the niobium RRR was observed between RRR=200 and 320 in electropolished cavities
  • Keywords
    Q-factor; accelerator cavities; electrolytic polishing; superconducting cavity resonators; 1.3 GHz; Nb superconducting cavities; cavity quality factor; electropolishing; quench field; single-cell cavities; Acceleration; Assembly; Chemicals; Niobium; Q factor; Surface cleaning; Surface finishing; System testing; Temperature; Thermal conductivity;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Particle Accelerator Conference, 1999. Proceedings of the 1999
  • Conference_Location
    New York, NY
  • Print_ISBN
    0-7803-5573-3
  • Type

    conf

  • DOI
    10.1109/PAC.1999.795725
  • Filename
    795725
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=345564