GB1166051A - Improvements in or relating to Flash X-Ray Generation Methods and Apparatus - Google Patents

Improvements in or relating to Flash X-Ray Generation Methods and Apparatus

Info

Publication number
GB1166051A
GB1166051A GB27896/66A GB2789666A GB1166051A GB 1166051 A GB1166051 A GB 1166051A GB 27896/66 A GB27896/66 A GB 27896/66A GB 2789666 A GB2789666 A GB 2789666A GB 1166051 A GB1166051 A GB 1166051A
Authority
GB
United Kingdom
Prior art keywords
anode
pulse
cathode
control electrode
electrons
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
GB27896/66A
Inventor
William Denley Owen
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB27896/66A priority Critical patent/GB1166051A/en
Priority to US646825A priority patent/US3518433A/en
Priority to FR111378A priority patent/FR1528392A/en
Publication of GB1166051A publication Critical patent/GB1166051A/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

Landscapes

  • X-Ray Techniques (AREA)

Abstract

1,166,051. X-ray tubes. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. 15 June, 1967 [22 June, 1966], No. 27896/66. Heading H1D In a method of generating a flash X-ray pulse, a high voltage pulse is applied in a vacuum of at least 10<SP>-10</SP> torr between at least one sharpedged or fine wire field-emission cathode and an adjacent control electrode and simultaneously a high voltage pulse is applied between the anode and the cathode or control electrode to accelerate electrons to the anode to generate X-rays thereat, and the cathode-control electrode pulse is short enough and the vacuum high enough so that electrons are produced only by field emission, and ionization of the cathode and metallic arc formation are prevented. The anode pulse may be a positive pulse with a negative overswing in which event the cathode-control electrode pulse has a positive duration less than that of the anode pulse. As shown in Fig. 1, four cathodes 3, 3<SP>1</SP>, 4, 4<SP>1</SP> are arranged with their respective sharp edges 6, 6<SP>1</SP>, 7, 7<SP>1</SP> directed towards and aligned transversely of anode rod 1 and the cylindrical control electrode 2 coaxially surrounding the anode rod has two longitudinal slots 8, 8<SP>1</SP> aligned with the cathodes to permit electrons to reach the anode. In another embodiment, Fig. 5, the cathodes 21 are annular tungsten plates having sharp inner edges and are supported in molybdenum annular cups 22 and are coaxial with the anode rod 17, which may be tapered. The control electrodes are rings 26 coaxial with anode rod 17 and arranged so that the cathode plates are equispaced between the rings. An earthed shield 31 may surround the envelope to improve the focusing of electrons on to the anode. Typical dimensions and operating conditions are given for the embodiments. By varying the anode pulse independently of the other pulse, the desired X-ray energy in constant doses may be produced.
GB27896/66A 1966-06-22 1966-06-22 Improvements in or relating to Flash X-Ray Generation Methods and Apparatus Expired GB1166051A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB27896/66A GB1166051A (en) 1966-06-22 1966-06-22 Improvements in or relating to Flash X-Ray Generation Methods and Apparatus
US646825A US3518433A (en) 1966-06-22 1967-06-19 Methods and apparatus for generating flash x-rays employing a three electrode field emission x-ray tube
FR111378A FR1528392A (en) 1966-06-22 1967-06-21 Method and apparatus for generating flash x-rays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27896/66A GB1166051A (en) 1966-06-22 1966-06-22 Improvements in or relating to Flash X-Ray Generation Methods and Apparatus

Publications (1)

Publication Number Publication Date
GB1166051A true GB1166051A (en) 1969-10-01

Family

ID=10267033

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27896/66A Expired GB1166051A (en) 1966-06-22 1966-06-22 Improvements in or relating to Flash X-Ray Generation Methods and Apparatus

Country Status (2)

Country Link
US (1) US3518433A (en)
GB (1) GB1166051A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109273538A (en) * 2018-10-26 2019-01-25 湘潭大学 Based on a kind of silicon drifting detector (SDD) and its design method for controlling surface field

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958365A (en) * 1981-10-21 1990-09-18 Elscint Ltd. Medical imaging device using triggered plasma cathode flash X-ray source
FR2764731A1 (en) * 1997-06-13 1998-12-18 Commissariat Energie Atomique X-RAY TUBE COMPRISING A MICROPOINT ELECTRON SOURCE AND MAGNETIC FOCUSING MEANS
US20030002628A1 (en) * 2001-06-27 2003-01-02 Wilson Colin R. Method and system for generating an electron beam in x-ray generating devices
US7889835B2 (en) * 2003-08-07 2011-02-15 Morpho Detection, Inc. System and method for detecting an object by dynamically adjusting computational load
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
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
CA2754622C (en) * 2008-05-16 2013-11-19 Advanced Fusion Systems Llc Flash x-ray irradiator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886725A (en) * 1955-07-22 1959-05-12 Machlett Lab Inc X-ray tubes
GB943022A (en) * 1960-04-08 1963-11-27 Ass Elect Ind Improvements in and relating to x-ray tube construction
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109273538A (en) * 2018-10-26 2019-01-25 湘潭大学 Based on a kind of silicon drifting detector (SDD) and its design method for controlling surface field

Also Published As

Publication number Publication date
US3518433A (en) 1970-06-30

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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