| abstract |
A flash lamp ( 10 ), comprising a gas-filled discharge tube ( 10 ) made of glass and, at each end, a power electrode ( 14, 15 ) that is sealed by means of a glass solder ( 13 ), has a glass including one or more of the following U.V. transmission values Tw: at 180 nm: Tw>5%, preferably >9 %; at 200 nm: Tw>30%, preferably >45%; at 254 nm: Tw>60%, preferably >80%. The inside diameter of the discharge tube ( 11 ) may be larger than 1.2 times the value of the plasma channel diameter. The starting electrode ( 16 ) may be part of the reflector ( 30 - 33 ) or be connected electrically thereto. Flash capacitor ( 42 ) may be designed for a charging voltage above 370 volts, preferably above 400 volts. |