A gas discharge lamp for use as a flash lamp comprises a closed discharge vessel; two conductors for contacting an electrode; and at least one electrical seal that encapsulates an outer portion of an electrical conductor adjacent to the wall of the closed discharge vessel. At least one electrical seal comprises an electrically insulating shielding that encloses the outer portions of the electrical conductors.

Provided is an apparatus for sealing an arc-tube including a jig body including an electrode pin hole into which an end part of the electrode pin inserted into a bypass tube part of the arc-tube is inserted and a connection path connected with the electrode pin hole; and a pressurizing means inserted into the connection path to pressurize and fix the electrode pin positioned at the electrode pin hole. Therefore, the apparatus for sealing an arc-tube can more easily and stably fix the electrode pin during a sealing process.

A radiation source assembly comprises a source base, a UV transparent sleeve, and a UV lamp. The source base comprises a sealed electrical connection interface and an opposing sealed sleeve interface. The sealed electrical connection interface comprises a electrical contacts and the sealed sleeve interface comprise a radial sealing element, an outer collar, and a compression ring. The UV transparent sleeve is engaged with the sleeve interface such that the radial sealing element of the sealed sleeve interface is disposed between the UV transparent sleeve and the outer collar of the source base, and the compression ring is positioned over the UV transparent sleeve and engaged with the source base to compress the radial sealing element onto the UV transparent sleeve and the outer collar. The UV lamp is disposed within the UV transparent sleeve and electrically coupled to the electrical contacts of the electrical connection interface.