EP 0534762 A1 19930331 - Dielectric support rod for a traveling-wave tube.
Title (en)
Dielectric support rod for a traveling-wave tube.
Title (de)
Dielektrischer Stützstab für eine Wanderfeldröhre.
Title (fr)
Tige diélectrique de support pour un tube à ondes progressives.
Publication
Application
Priority
JP 24866691 A 19910927
Abstract (en)
A dielectric support rod for a traveling-wave tube has a core (10) of boron nitride coated with a dielectric (11). The dielectric has a secondary electron emission ratio of 1 or more, when primary electrons of eE (eV) are incident thereon, where E (V) is the voltage between the cathode and the RF circuit of the traveling-wave tube, and e (Coul) is the charge on an electron. The dielectric to be coated on the surface can be alumina or beryllia. The rod does not then become negatively charged such as to cause the track of the electrons to become unstable. <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
H01J 23/26 (2006.01)
CPC (source: EP)
H01J 23/26 (2013.01)
Citation (search report)
- [X] EP 0402549 A1 19901219 - THOMSON CSF [FR]
- [X] FR 2646732 A1 19901109 - RAYTHEON CO [US]
- [Y] DE 3235753 A1 19840329 - SIEMENS AG [DE]
- [Y] CH 326748 A 19571231 - SIEMENS AG [DE]
- [Y] US 3466494 A 19690909 - EICHIN WERNER, et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 92308726 A 19920924; JP 24866691 A 19910927