1IEC 62271-100 High-voltage switchgear and controlgearpartl00:high-voltage alternating-current circuit-breaker[S].Switherland:IEC Publication,2004.
2ANSI C37.85-2002 Alternating current high voltage power vacuum interrupters-safety requirements for X-radiation limitsI[S].Rosslyn.USA:National Electrical Manufactures Associa-tion,2002.
3Managing Patient Dose in Multi-detector Computed Tomography(MDCT)[S].32/219/06 Dec vers.ICRP.
8walczak K.Method for vacuum state evaluation based on analy-sis of dynamics changes of electron field emission current and X-radiation in time[e].IEEE XXth International Symposium on Discharges and Electrical Insulation in Vacuum[S.I].2002:231-234.