| 摘要 |
PURPOSE:To prevent a cathode from loosening and coming off, by installing a discharge chamber having an outer diameter smaller than the inner diameter of the cathode, fixing a plurality of bent stainless plates on the inner wall surface of the cathode, inserting the discharge chamber between the stainless plates, and fixing and holding the cathode. CONSTITUTION:A hallow body 2a having a spot facing is fixed to an encasulating plate member 1a turning to a part of a cathode side surrounding vessel and bonded by using soldering material 3. An anode side encapsulating plate member 1b and a hallow body 2b having a spot facing are similarly assembled and bonded. On the lower part of the inner wall of a bell-shaped cathode 5, three pieces of <-shaped stainless rectangular sprungs 6 are fixed by welding 14. A discharge chamber 8 wherein a discharge capillary 7 and a large diameter tube glass flared is integrally formed on the anode side encapsulating plate member 1b. The discharge chamber 8 is connected with a flare tip circumference part. The respective assembled encasulating plate members are bonded via a glass thick tube 4, and a surrounding vessel is constituted. At the time of this bonding, the discharge chamber 8 head part is inserted in the inside of the bell-shaped cathode 5, and made to abut against a spring plate 6, thereby fixing the cathode 5. |
