GB1061793A - Method of producing x-ray pulses - Google Patents

Method of producing x-ray pulses

Info

Publication number
GB1061793A
GB1061793A GB12177/64A GB1217764A GB1061793A GB 1061793 A GB1061793 A GB 1061793A GB 12177/64 A GB12177/64 A GB 12177/64A GB 1217764 A GB1217764 A GB 1217764A GB 1061793 A GB1061793 A GB 1061793A
Authority
GB
United Kingdom
Prior art keywords
anode
cathode
pulses
field emission
portions
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
GB12177/64A
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.)
Field Emission Corp
Original Assignee
Field Emission Corp
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 Field Emission Corp filed Critical Field Emission Corp
Publication of GB1061793A publication Critical patent/GB1061793A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/22—X-ray tubes specially designed for passing a very high current for a very short time, e.g. for flash operation

Abstract

1,061,793. X-ray tubes. FIELD EMISSION CORPORATION. March 23, 1964 [June 24, 1963], No. 12177/64. Heading H1D In a method of producing high-intensity X- ray pulses from a diode X-ray tube which includes a pointed anode and a cathode structure having a plurality of separate field emission portions, pulses are applied to cause field emission, each pulse melting part of the metal of at least one of the cathode portions to provide cathode metal vapour ions to enhance the current flow through the tube, and being of sufficiently great intensity and short duration to ensure that the impacted surface layer of anode material is vaporized, the main body of the anode remaining below its melting point. The pulses are applied between a tungsten or molybdenum anode 14 having a conical end 16, and cathode portions 28, each of which has an array of projecting needles 30, and is supported around the anode by a nickel or stainless stee cylinder 32 mounted on a nickel disc 24 having a beryllium window 22. For a tungsten anode, the electrons incident thereon must provide more than 20 joules cm.-<SP>2</SP> to vaporize the surface layer, the material condensing on the glass envelope 12 to give a gettering action, shortcircuiting of the anode and cathode being prevented by a shield 34. In alternative embodiments, knife-edge rather than needle projections on the cathodes may be employed (Figs. 3 and 4, not shown), and the cathodes may be mounted perpendicular to the anode axis (Figs. 5 and 6, not shown). The envelope may be a glass sphere, metal pins passing therethrough to support the mounting cylinder 32.
GB12177/64A 1963-06-24 1964-03-23 Method of producing x-ray pulses Expired GB1061793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US289999A US3309523A (en) 1963-06-24 1963-06-24 X-ray tube having field emission cathode and evaporative anode in combination with electrical pulser means

Publications (1)

Publication Number Publication Date
GB1061793A true GB1061793A (en) 1967-03-15

Family

ID=23114095

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12177/64A Expired GB1061793A (en) 1963-06-24 1964-03-23 Method of producing x-ray pulses

Country Status (4)

Country Link
US (1) US3309523A (en)
DE (1) DE1238584B (en)
GB (1) GB1061793A (en)
NL (1) NL6406080A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047267A3 (en) * 2006-10-16 2008-09-04 Philips Intellectual Property X-ray tube with ion deflecting and collecting device made from a getter material

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397337A (en) * 1966-01-14 1968-08-13 Ion Physics Corp Flash X-ray dielectric wall structure
US3453478A (en) * 1966-05-31 1969-07-01 Stanford Research Inst Needle-type electron source
GB1166051A (en) * 1966-06-22 1969-10-01 Atomic Energy Authority Uk Improvements in or relating to Flash X-Ray Generation Methods and Apparatus
US3714486A (en) * 1970-10-07 1973-01-30 Crary J Mc Field emission x-ray tube
US3883760A (en) * 1971-04-07 1975-05-13 Bendix Corp Field emission x-ray tube having a graphite fabric cathode
US3735187A (en) * 1971-12-22 1973-05-22 Bendix Corp Cathode blade for a field emission x-ray tube
US3783289A (en) * 1972-06-14 1974-01-01 Field Emission Corp Marx surge pulser having stray capacitance which is high for input stages and low for output stages
US3783288A (en) * 1972-06-26 1974-01-01 Field Emission Corp Pulsed vacuum arc operation of field emission x-ray tube without anode melting
DE3605735A1 (en) * 1986-02-22 1986-10-30 Holger Dr. 7400 Tübingen Hübner Device for producing short electron pulses, ion pulses or X-ray pulses having high directionality
JPH0673291B2 (en) * 1988-04-16 1994-09-14 株式会社東芝 X-ray tube
US5442677A (en) * 1993-10-26 1995-08-15 Golden; John Cold-cathode x-ray emitter and tube therefor
US6064718A (en) * 1998-09-29 2000-05-16 The United States Of America As Represented By The Secretary Of The Navy Field emission tube for a mobile X-ray unit
GB202203241D0 (en) * 2019-08-11 2022-04-20 Rapiscan Systems Inc Systems and methods for using three-dimensional x-ray imaging in meat production and processing applications

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE407431C (en) * 1924-12-22 Julius Edgar Lilienfeld Dr Electrode arrangement for X-ray tubes
US1612641A (en) * 1921-06-16 1926-12-28 Morrison Montford X-ray tube
DE748185C (en) * 1939-11-08 1944-10-28 Process for generating short-term flashes of X-rays
US2720607A (en) * 1952-06-23 1955-10-11 Edward L Criscuolo Sealed off, fine focus, long life, flash x-ray tube
US2886725A (en) * 1955-07-22 1959-05-12 Machlett Lab Inc X-ray tubes
US3174043A (en) * 1961-06-01 1965-03-16 Field Emission Corp Short pulse-high intensity vacuum arc x-ray system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047267A3 (en) * 2006-10-16 2008-09-04 Philips Intellectual Property X-ray tube with ion deflecting and collecting device made from a getter material

Also Published As

Publication number Publication date
NL6406080A (en) 1964-12-28
US3309523A (en) 1967-03-14
DE1238584B (en) 1967-04-13

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