| 摘要 |
<p>PURPOSE: To provide a stable magnetron suppressing the contact resistance to the minimum and allowing a large-current operation by filling an oxide in a Ni porous layer plate having a continuous three-dimensional mesh structure. CONSTITUTION: This oxide cathode structure is constituted of a sleeve 1 composed of Ni as principal component, an electron emitting layer 3 fixed to the sleeve 1 and having an oxide 6 manly composed of Ba and Ca or Sr, end hats 2 fixed near both end sections of the electron emitting layer 3 of the sleeve 1, and a heater 4 inserted into the sleeve 1. The electron emitting layer 3 is constituted of a Ni porous layer plate 5 fixed to the sleeve 1 and having a three-dimensional mesh structure and the oxide 6 filled in hole sections of the Ni porous layer plate 5. Since the oxide 6 is filled in the Ni porous layer plate 5 having the continuous three-dimensional mesh structure, the contact resistance can be suppressed to the minimum, and a stable magnetron allowing a large- current operation is obtained.</p> |
