(19)
(11) EP 2 053 905 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
19.08.2009 Bulletin 2009/34

(43) Date of publication:
29.04.2009 Bulletin 2009/18

(21) Application number: 07119433.6

(22) Date of filing: 26.10.2007
(51) International Patent Classification (IPC): 
H05H 7/20(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(71) Applicant: The Secretary, Department Of Atomic Energy, Govt. of India
Anushakti Bhavan Chatrapati Shivaji Maharaj Marg Mumbai 400 001, Maharastra (IN)

(72) Inventors:
  • Roy, Sindhunil Barman
    452013 Indore (IN)
  • Sahni, Vinod Chandra
    Indore 452013 (IN)

(74) Representative: W.P. Thompson & Co. 
Eastcheap House Central Approach
Letchworth Hertfordshire SG6 3DS
Letchworth Hertfordshire SG6 3DS (GB)

   


(54) A method of qualifying niobium and/or other super conducting materials for reliable fabrication of superconducting radio frequency (SCRF) cavities


(57) A method of qualifying Niobium and/or other super conducting materials for the reliable fabrication of SCRF cavities, which will invariably deliver high accelerating fields comprising:
identification of the best superconducting lower critical field (HC1) based on subjecting a sample of the superconducting material selectively to mechanical stress, annealing at various temperatures, various chemical treatments, post-chemical treatment baking/annealing; and
identification of the best possible thermal conductivity of the material at said best superconducting lower critical field (HC1) to thereby qualify the superconducting material for the reliable fabrication of SCRF cavities adapted to deliver high accelerating fields.