| 摘要 |
<p>PURPOSE:To get a cylindrical impregnation-type cathode structure without a short circuit between lines and equipped with a heater high in earthquake resistance. CONSTITUTION:This structure is equipped with a cylindrical impregnation-type cathode, which is impregnated, in its porous base substance of high melting point metal, with electron emitting substance, a cathode sleeve 5, which consists of high melting point metal, an alumina powder sintered substance 1, which has a heater 2 within and is equipped, at the periphery, with a metallized layer 3 and a nickel layer 4, a molybdenum rutheniun solder material 6 for soldering them, and a molybdenum nickel solder material layer 8.</p> |
