GB716707A - Improvements in or relating to electron discharge devices with thermionic cathodes - Google Patents

Improvements in or relating to electron discharge devices with thermionic cathodes

Info

Publication number
GB716707A
GB716707A GB35851A GB35851A GB716707A GB 716707 A GB716707 A GB 716707A GB 35851 A GB35851 A GB 35851A GB 35851 A GB35851 A GB 35851A GB 716707 A GB716707 A GB 716707A
Authority
GB
United Kingdom
Prior art keywords
tube
cathode
thermionic
resistor
oscillations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB35851A
Inventor
Rudolf Kompfner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Priority to GB35851A priority Critical patent/GB716707A/en
Publication of GB716707A publication Critical patent/GB716707A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/11—Means for reducing noise

Landscapes

  • X-Ray Techniques (AREA)

Abstract

716,707. Thermionic-cathode tubes. ENGLISH ELECTRIC VALVE CO., Ltd. Dec. 7, 1951 [Jan. 4, 1951], No. 358/51. Class 39(1) In an electron discharge tube having a thermionic cathode, noise arises due to the thermal spread of emission velocities. This velocity spread is in effect representable by an equivalent velocity modulation which gives rise to " plasma " oscillations. According to the invention plasma oscillations are damped down by surrounding the beam with a tubular resistor between the electron gun and, for example, the buncher in a klystron, or the helix in a travelling-wave tube, or the centre of deflection in a cathode-ray tube. In the image orthicon shown. the tubular resistor 7 extends through the aligned central apertures of the collector electrode and electron multiplier system 9. The resistor may be constituted by a thin layer of colloidal graphite, metal or metallic alloy deposited on a supporting glass, quartz or ceramic tube. The supporting tube may form part of the envelope in which case it may be surrounded by a dewar flask containing liquid air or hydrogen for cooling purposes.
GB35851A 1951-01-04 1951-01-04 Improvements in or relating to electron discharge devices with thermionic cathodes Expired GB716707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB35851A GB716707A (en) 1951-01-04 1951-01-04 Improvements in or relating to electron discharge devices with thermionic cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35851A GB716707A (en) 1951-01-04 1951-01-04 Improvements in or relating to electron discharge devices with thermionic cathodes

Publications (1)

Publication Number Publication Date
GB716707A true GB716707A (en) 1954-10-13

Family

ID=9702985

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35851A Expired GB716707A (en) 1951-01-04 1951-01-04 Improvements in or relating to electron discharge devices with thermionic cathodes

Country Status (1)

Country Link
GB (1) GB716707A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031432B (en) * 1955-03-19 1958-06-04 Telefunken Gmbh Low-noise electrical discharge tubes for amplifying very short electromagnetic waves, in which a flow of electrons interacts with the field of these waves
US2918599A (en) * 1953-02-27 1959-12-22 Int Standard Electric Corp Electron velocity modulation tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918599A (en) * 1953-02-27 1959-12-22 Int Standard Electric Corp Electron velocity modulation tubes
DE1031432B (en) * 1955-03-19 1958-06-04 Telefunken Gmbh Low-noise electrical discharge tubes for amplifying very short electromagnetic waves, in which a flow of electrons interacts with the field of these waves

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