GB892535A - Travelling wave electron tube apparatus - Google Patents
Travelling wave electron tube apparatusInfo
- Publication number
- GB892535A GB892535A GB21711/58A GB2171158A GB892535A GB 892535 A GB892535 A GB 892535A GB 21711/58 A GB21711/58 A GB 21711/58A GB 2171158 A GB2171158 A GB 2171158A GB 892535 A GB892535 A GB 892535A
- Authority
- GB
- United Kingdom
- Prior art keywords
- helix
- tube
- metal
- cathode
- output waveguide
- 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
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
-
- 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
- H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
- H01J23/087—Magnetic focusing arrangements
-
- 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
- H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
- H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
- H01J23/42—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit the interaction circuit being a helix or a helix-derived slow-wave structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
- H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
- H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
- H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
- H01J25/40—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the backward travelling wave being utilised
Landscapes
- Microwave Tubes (AREA)
Abstract
892,535. Travelling wave tubes. VARIAN ASSOCIATES. July 7, 1958 [July 24, 1957], No. 21711/58. Class 39(1) In a travelling wave tube preferably a backward wave oscillator a permanent magnet 52, 53 or a solenoid is provided Fig. 9 for causing a longitudinal magnetic focusing field to be produced and has two polepieces 55, 56 each with a hollow cylindrical shim of magnetic material mounted thereon with the output waveguide 48 extending between the shims increasing the uniformity of the magnetic field along the beam path especially over the region of the output waveguide where the magnetic field is liable to vary most. The shims 63, 64 are mounted on (spot welded to) polepieces 55, 56 each having 3 pointed centring screws 62 for centring and aligning the discharge tube within the magnet system. The discharge tube also has polepieces 5, 31 forming parts of the envelope and the polepiece 31 serving as the collector. The external magnet parts, polepieces carrying the shims and polepiece retainers 57, 58 are held together by bolts 54 (see Fig. 9) and the output waveguide is taken through a flexible grommet 65. The shims 63, 64 may be of unequal lengths, as shown and may if desired be extended right up to either side of the output waveguide. The tube envelope body portion 1 is of Cu Ni alloy and surrounds a tape or wire helix 2 which is mounted by glazing in 3 sapphire rods 3 forming a pressfit in cylinder 1 the end of the helix adjacent the cathode being coupled to the output waveguide 43 by means of an annular member 39 having a raised block portion 41 to which the helix is brazed, and the vacuum being maintained by a ceramic window 47 which is sealed across a tapered section of the waveguide. The window is carried by frames 45, 46 of copper nickel alloy and brass frame. The end seals of the tube are effected by ceramic discs 34, 7 metal cups 6, 32, 33 and metal disc 35 and pinched off copper exhaust tube 36. The metal to metal tube envelope joints are effected by brazing. The indirectly heated cathode is mounted by three Mo washers 12, 13, 14 and has an annular emissive surface inner and outer focusing electrodes 24, 13 being provided followed by density modulating grid 18 of hexagonal shape brazed to adapter 17 carried by three metal tabs 15 from a frame 12 to which they are brazed but not in contact therewith so thermal expansion and contraction of 18 is permitted. In assembly the cathode mounting structure is slipped into the envelope with end cup 8 against 1 and held thereagainst by spring 11<SP>1</SP> abutting against metal washer 12; the gun structure as a whole being carried by three sapphire rods 9. The cathode is mounted from a ring 14 by 3 struts 20, Fig. 7 so as to allow for thermal expansion and contraction and outer focusing electrode is similarly mounted. The gun anode 28 acts as a beam ' shaver' i.e. it eliminates the outermost electrons of the beam and carries a grid 29. Electronic tuning is achieved by varying the voltage of anode 28. Collector structure 37 which may or may not be of magnetic material drains positive ions while 31 37<SP>1</SP> and 2 prevent the return of secondaries to the helix. In a modification, Fig. 12, a ring electrode negative with respect to the collector and helix e.g. at cathode potential drains the positive ions and also prevents secondary electrons from the collector from returning to the helix.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US673818A US2991391A (en) | 1957-07-24 | 1957-07-24 | Electron beam discharge apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB892535A true GB892535A (en) | 1962-03-28 |
Family
ID=24704229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21711/58A Expired GB892535A (en) | 1957-07-24 | 1958-07-07 | Travelling wave electron tube apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US2991391A (en) |
DE (2) | DE1291419B (en) |
FR (1) | FR1207882A (en) |
GB (1) | GB892535A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3070725A (en) * | 1958-03-17 | 1962-12-25 | Eitel Mccullough Inc | Travelling wave amplifier |
US3172004A (en) * | 1960-06-17 | 1965-03-02 | Sperry Rand Corp | Depressed collector operation of electron beam device |
NL282676A (en) * | 1961-08-31 | |||
US3328628A (en) * | 1961-11-27 | 1967-06-27 | Nippon Electric Co | Electron tube employing a relatively long electron beam and getter material disposedat the collector |
GB1066644A (en) * | 1963-07-12 | 1967-04-26 | Matsushita Electronics Corp | Hermetic window construction of waveguide for extremely high frequency electronic tubes |
US3283200A (en) * | 1963-12-12 | 1966-11-01 | Varian Associates | High frequency electron discharge device having improved permanent magnetic focusing |
US3363137A (en) * | 1963-12-30 | 1968-01-09 | Varian Associates | High frequency electron discharge device having structural portions of a binary copper-iron alloy with 0.4 to 4.5% by weight of iron |
US3372297A (en) * | 1964-09-28 | 1968-03-05 | Varian Associates | High frequency electron discharge devices and thermionic cathodes having improved (cvd) refractory insulation coated heater wires |
US3387167A (en) * | 1964-11-06 | 1968-06-04 | Varian Associates | Linear beam microwave tube having pole caps providing a tapered magnetic field along the beam axis |
US3383543A (en) * | 1964-12-21 | 1968-05-14 | Raytheon Co | Gridded ion-drain electrode structure for traveling wave devices |
DE2422884C2 (en) * | 1974-05-11 | 1983-06-16 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Holder for the electrodes of an electron beam generation system within the vacuum envelope of a microwave tube |
FR2630257A1 (en) * | 1988-04-19 | 1989-10-20 | Thomson Csf | PROGRESSIVE WAVE TUBE HAVING A COUPLING DEVICE BETWEEN ITS DELAY LINE AND EXTERNAL HYPERFREQUENCY CIRCUITS |
US8642959B2 (en) | 2007-10-29 | 2014-02-04 | Micron Technology, Inc. | Method and system of performing three-dimensional imaging using an electron microscope |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2284733A (en) * | 1939-02-02 | 1942-06-02 | Rca Corp | Electron discharge device |
NL61321C (en) * | 1939-09-13 | |||
US2392379A (en) * | 1941-11-28 | 1946-01-08 | Sperry Gyroscope Co Inc | High frequency electron discharge apparatus |
US2584802A (en) * | 1947-01-18 | 1952-02-05 | Rca Corp | Very high-frequency electron tube |
FR967662A (en) * | 1948-06-04 | 1950-11-09 | Csf | Improvements to wave propagation tubes |
US2801361A (en) * | 1948-12-10 | 1957-07-30 | Bell Telephone Labor Inc | High frequency amplifier |
US2758245A (en) * | 1950-12-14 | 1956-08-07 | Varian Associates | Beam type electronic tube |
US2707758A (en) * | 1950-12-19 | 1955-05-03 | Sperry Corp | Travelling wave tube |
US2758242A (en) * | 1951-03-13 | 1956-08-07 | Sperry Rand Corp | Travelling wave tubes |
US2752523A (en) * | 1951-05-15 | 1956-06-26 | Int Standard Electric Corp | Electron discharge apparatus |
BE516533A (en) * | 1951-12-29 | |||
DE936882C (en) * | 1952-03-09 | 1955-12-22 | Telefunken Gmbh | Coupling arrangement |
BE521167A (en) * | 1952-04-08 | 1900-01-01 | ||
US2758244A (en) * | 1952-06-02 | 1956-08-07 | Rca Corp | Electron beam tubes |
US2708727A (en) * | 1952-06-12 | 1955-05-17 | Bell Telephone Labor Inc | Helix coupling arrangements |
US2812468A (en) * | 1952-12-30 | 1957-11-05 | Bell Telephone Labor Inc | Spatial harmonic traveling wave tube |
DE1071237B (en) * | 1953-04-29 | |||
US2836758A (en) * | 1953-10-12 | 1958-05-27 | Varian Associates | Electron discharge device |
US2813990A (en) * | 1953-12-30 | 1957-11-19 | Bell Telephone Labor Inc | Electron beam discharge device |
DE1063720B (en) * | 1954-05-22 | 1959-08-20 | Telefunken Gmbh | Electric discharge tubes based on the running field principle |
US2817039A (en) * | 1954-10-18 | 1957-12-17 | Hughes Aircraft Co | Cathode support |
US2925508A (en) * | 1955-07-28 | 1960-02-16 | Sperry Rand Corp | Electron beam focusing structure |
NL100180C (en) * | 1955-09-22 |
-
1957
- 1957-07-24 US US673818A patent/US2991391A/en not_active Expired - Lifetime
-
1958
- 1958-07-07 GB GB21711/58A patent/GB892535A/en not_active Expired
- 1958-07-22 DE DEV14741A patent/DE1291419B/en active Pending
- 1958-07-22 FR FR1207882D patent/FR1207882A/en not_active Expired
- 1958-07-22 DE DEV17751A patent/DE1291420B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US2991391A (en) | 1961-07-04 |
FR1207882A (en) | 1960-02-19 |
DE1291420B (en) | 1969-03-27 |
DE1291419B (en) | 1969-03-27 |
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