Manufacture of flash light discharge lamp

Abstract

Abstract PURPOSE:To reduce fluctuation of discharge starting voltage by impregnating with aqueous solution of electron emission material then heating the sintered member under vacuum to remove water and drying. CONSTITUTION:Tungsten-nickel sintered material is impregnated with aqueous solution containing 10% cesium carbonate then placed in vacuum chamber to perform evacuation and upon achieving vacuum of 10<-5>Torr, heating is started. Then heating is controlled to produce pressure lower than 10<-3>Torr with the maximum heating temperature of 150 deg.C. With this temperature, heating is continued to recover pre-heating vacuum condition or 10<-5>Torr pressure, to produce a sintered cathode. Consequently, fluctuation of discharge starting voltage is reduced while discharge starting voltage itself is lowered.

Inventors

• 👤 Yasukiyo Otani
• 👤 大谷　泰清
• 👤 Masahiro Tsujikawa
• 👤 辻川　正弘

Bibliographic Details