Secondary emission cathode having supeconductive oxide material

Details Secondary emission cathode having supeconductive oxide material Secondary emission cathode having supeconductive oxide material

1991-09-09

1994-09-20

Pascal, Robert J.

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

505700, 505100, 505200, 315 393, 315 533, 315 511, 313346R, 313103R, 330 42, 252521, H01J 2305, H01J 2542, H01J 1906, H01L 3912

Patent

active

053489349

ABSTRACT:
A cathode for a secondary emission structure comprised of a superconductive material is described. In one embodiment the cathode comprises a layer of a superconductive material such as yttrium barium cupric oxide, or rare earth substituted neodymium cupric oxides. The layer may be bonded to a metal electrode or preferably the cathode consist of a superconductive or conductive oxide. The use of a superconductive material provides a cathode having suitable secondary emission characteristics and, furthermore, which being conductive at room temperatures, as well as, temperatures of operation of the cathode, obviating the need for a use of a very thin film of a secondary emission material.

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Dallos, A., B. H. Smith, and C. Bowness, Simulation of Rod Charging in TWT Helix Structures, 1989 IEEE, pp. 8.4.1-8.4.4.

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