http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0227463-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b5231c81de1a546c1d6a9325c10910ce |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J23-05 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J23-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J23-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J25-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03F3-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J1-32 |
| filingDate | 1986-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eacffd9689bbc606212930238e963e2e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cc002a321fd15263a8915bcdf28ebb80 |
| publicationDate | 1987-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0227463-A2 |
| titleOfInvention | Secondary emission cathode and tube |
| abstract | A crossed-field amplifier (10) has permanent magnets (22,23), pole pieces (20,21), a cylindrical anode (12), and a cathode (11) in the form of a water-cooled cylindrical heat sink (34) with radially extending portions (35) having outer faces coated with a P-N junction semiconductor (37) which is biased to the conductive state to cause the crossed-field amplifier (10) to amplify. The P and N regions (39,38) of the semiconductor (37) are connected to a cathode modulator (57) which is pulsed to produce conduction in the P-N junction (61) and thereby allow secondary emission from the cathode (11) into an interaction space (19) between the semiconductor (37) and an anode slow wave structure (14) that receives RF drive pulses from a source (58). Reverse bias voltage applied by the modulator (57) prevents secondary emission from the cathode (11). Only low voltages need be applied to the cathode P-N junction (61) to completely deactivate the crossed-field amplifier (10). Removal of the RF drive pulse applied to the anode-slow-wave circuit (14,15,16) and removal of the DC high voltage power supply (29) are not required. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0273713-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0273713-A2 |
| priorityDate | 1985-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.