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GB1390575A - Pulsed vacuum arc operation of field emission x-ray tube without anode melting - Google Patents

Pulsed vacuum arc operation of field emission x-ray tube without anode melting

Info

Publication number
GB1390575A
GB1390575A GB2724673A GB2724673A GB1390575A GB 1390575 A GB1390575 A GB 1390575A GB 2724673 A GB2724673 A GB 2724673A GB 2724673 A GB2724673 A GB 2724673A GB 1390575 A GB1390575 A GB 1390575A
Authority
GB
United Kingdom
Prior art keywords
anode
field emission
generator
peak voltage
ray tube
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
GB2724673A
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 GB1390575A publication Critical patent/GB1390575A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/60—Circuit arrangements for obtaining a series of X-ray photographs or for X-ray cinematography
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/10—Power supply arrangements for feeding the X-ray tube
    • H05G1/20—Power supply arrangements for feeding the X-ray tube with high-frequency ac; with pulse trains

Landscapes

  • X-Ray Techniques (AREA)

Abstract

1390575 Supply circuits for X-ray tubes FIELD EMISSION CORP 7 June 1973 [26 June 1972] 27246/73 Heading H2H [Also in Divisions H1 and H5] Pulsed X-ray apparatus comprises an X-ray tube 10 including an evacuated envelope 20 containing a field emission cathode 14 and an anode 12 which emits X-rays, a high voltage pulse generator 34 and an exposure control 44 which enables the pulse generator to supply to the anode a train of pulses 42 having a peak voltage of at least 250 kilovolts. The generator 34, which may be a Marx surge or Blumlein field reversal generator, is supplied by a 15 kilovolt D.C. source 36 and is triggered by an oscillator 40. The total exposure time is determined by a potentiometer 46 and the pulse repetition rate is determined by a potentiometer 40. The pulses preferably have a peak voltage of 350 kilovolts, a width of 30 nanoseconds and a repetition rate of 1000 pulses per second. The relatively high peak voltage increases the penetration depth of the electrons in the anode thereby reducing the anode temperature to enable bombardment of the anode with high energy electrons without melting the anode.
GB2724673A 1972-06-26 1973-06-07 Pulsed vacuum arc operation of field emission x-ray tube without anode melting Expired GB1390575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26621872A 1972-06-26 1972-06-26

Publications (1)

Publication Number Publication Date
GB1390575A true GB1390575A (en) 1975-04-16

Family

ID=23013665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2724673A Expired GB1390575A (en) 1972-06-26 1973-06-07 Pulsed vacuum arc operation of field emission x-ray tube without anode melting

Country Status (4)

Country Link
US (1) US3783288A (en)
DE (1) DE2331642A1 (en)
FR (1) FR2191398A1 (en)
GB (1) GB1390575A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700992A1 (en) * 1997-01-14 1998-07-23 Siemens Ag X-ray tube with cold cathode
US7031430B2 (en) 2004-04-06 2006-04-18 General Electric Company System and method for detecting objects with differential operators
US7356174B2 (en) 2004-05-07 2008-04-08 General Electric Company Contraband detection system and method using variance data
US7492855B2 (en) 2003-08-07 2009-02-17 General Electric Company System and method for detecting an object
US7609807B2 (en) 2004-02-17 2009-10-27 General Electric Company CT-Guided system and method for analyzing regions of interest for contraband detection
US7889835B2 (en) 2003-08-07 2011-02-15 Morpho Detection, Inc. System and method for detecting an object by dynamically adjusting computational load

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US4051378A (en) * 1975-11-28 1977-09-27 Artronix, Inc. High speed x-ray pulsing device
US4947415A (en) * 1986-05-09 1990-08-07 Board Of Regents, The University Of Texas System Flash x-ray apparatus
US5044004A (en) * 1986-05-09 1991-08-27 Board Of Regents, The University Of Texas System Flash X-ray apparatus
US5202910A (en) * 1990-08-28 1993-04-13 North American Philips Corporation Anode for arc discharge devices
FR2764731A1 (en) * 1997-06-13 1998-12-18 Commissariat Energie Atomique X-RAY TUBE COMPRISING A MICROPOINT ELECTRON SOURCE AND MAGNETIC FOCUSING MEANS
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
US6464136B2 (en) 1999-12-28 2002-10-15 Christopher S. Walsh Record and verification method, apparatus and system
US6497358B1 (en) 1999-09-13 2002-12-24 Christopher S. Walsh Record and verification method and system for radiation therapy
US6495002B1 (en) * 2000-04-07 2002-12-17 Hy-Tech Research Corporation Method and apparatus for depositing ceramic films by vacuum arc deposition
US7082182B2 (en) * 2000-10-06 2006-07-25 The University Of North Carolina At Chapel Hill Computed tomography system for imaging of human and small animal
US6876724B2 (en) * 2000-10-06 2005-04-05 The University Of North Carolina - Chapel Hill Large-area individually addressable multi-beam x-ray system and method of forming same
US7227924B2 (en) * 2000-10-06 2007-06-05 The University Of North Carolina At Chapel Hill Computed tomography scanning system and method using a field emission x-ray source
US7085351B2 (en) * 2000-10-06 2006-08-01 University Of North Carolina At Chapel Hill Method and apparatus for controlling electron beam current
US10714213B2 (en) 2002-10-29 2020-07-14 Practice Velocity, LLC Method and system for automated medical records processing with patient tracking
US7624027B1 (en) 2002-10-29 2009-11-24 Practice Velocity, LLC Method and system for automated medical records processing
US9842188B2 (en) 2002-10-29 2017-12-12 Practice Velocity, LLC Method and system for automated medical records processing with cloud computing
US11361853B2 (en) 2002-10-29 2022-06-14 Practice Velocity, LLC Method and system for automated medical records processing with telemedicine
US8606594B2 (en) 2002-10-29 2013-12-10 Practice Velocity, LLC Method and system for automated medical records processing
US8155262B2 (en) * 2005-04-25 2012-04-10 The University Of North Carolina At Chapel Hill Methods, systems, and computer program products for multiplexing computed tomography
US8189893B2 (en) * 2006-05-19 2012-05-29 The University Of North Carolina At Chapel Hill Methods, systems, and computer program products for binary multiplexing x-ray radiography
CN101842052B (en) * 2007-07-19 2013-11-20 北卡罗来纳大学查珀尔希尔分校 Stationary x-ray digital breast tomosynthesis systems and related methods
US8600003B2 (en) * 2009-01-16 2013-12-03 The University Of North Carolina At Chapel Hill Compact microbeam radiation therapy systems and methods for cancer treatment and research
US8358739B2 (en) 2010-09-03 2013-01-22 The University Of North Carolina At Chapel Hill Systems and methods for temporal multiplexing X-ray imaging
US9782136B2 (en) 2014-06-17 2017-10-10 The University Of North Carolina At Chapel Hill Intraoral tomosynthesis systems, methods, and computer readable media for dental imaging
US10980494B2 (en) 2014-10-20 2021-04-20 The University Of North Carolina At Chapel Hill Systems and related methods for stationary digital chest tomosynthesis (s-DCT) imaging
US10835199B2 (en) 2016-02-01 2020-11-17 The University Of North Carolina At Chapel Hill Optical geometry calibration devices, systems, and related methods for three dimensional x-ray imaging
JP2020532089A (en) * 2017-09-02 2020-11-05 チェッテーン ゲゼルシャフト ミット ベシュレンクテル ハフツング Control devices for X-ray tubes and how to operate the X-ray tubes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309523A (en) * 1963-06-24 1967-03-14 Field Emission Corp X-ray tube having field emission cathode and evaporative anode in combination with electrical pulser means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700992A1 (en) * 1997-01-14 1998-07-23 Siemens Ag X-ray tube with cold cathode
DE19700992C2 (en) * 1997-01-14 1999-10-07 Siemens Ag X-ray tube
US7492855B2 (en) 2003-08-07 2009-02-17 General Electric Company System and method for detecting an object
US7889835B2 (en) 2003-08-07 2011-02-15 Morpho Detection, Inc. System and method for detecting an object by dynamically adjusting computational load
US7609807B2 (en) 2004-02-17 2009-10-27 General Electric Company CT-Guided system and method for analyzing regions of interest for contraband detection
US7031430B2 (en) 2004-04-06 2006-04-18 General Electric Company System and method for detecting objects with differential operators
US7356174B2 (en) 2004-05-07 2008-04-08 General Electric Company Contraband detection system and method using variance data

Also Published As

Publication number Publication date
FR2191398A1 (en) 1974-02-01
DE2331642A1 (en) 1974-01-17
US3783288A (en) 1974-01-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees