(19)

(11)

EP 1 649 487 A1

(12)

(43) Date of publication: 26.04.2006 Bulletin 2006/17 (21) Application number: 03758647.6 (22) Date of filing: 01.08.2003

(51) International Patent Classification (IPC):  H01J 49/04(1980.01) (86) International application number: PCT/IN2003/000260 (87) International publication number: WO 2005/013313 (10.02.2005 Gazette 2005/06)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR (71) Applicant: SECRETARY, DEPARTMENT OF ATOMIC ENERGY Mumbai 400 039 (IN)	(72) Inventors: Halbe, Shripad Rajaram Sector 4, Vashi, Navi,Mumbai 400 703 (IN) Sahni, Vinod Chandra Trombay, Mumbai 400-085 (IN) (74) Representative: Harrison Goddard Foote  Belgrave Hall Belgrave Street GB-Leeds LS2 8DD GB-Leeds LS2 8DD (GB)