EP0000271A1 - Plaque à cathode, détecteur sensible à la position pour particules neutres utilisant une telle plaque à cathode, système détecteur et appareil photographique les deux utilisant un tel détecteur - Google Patents

Plaque à cathode, détecteur sensible à la position pour particules neutres utilisant une telle plaque à cathode, système détecteur et appareil photographique les deux utilisant un tel détecteur Download PDF

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Publication number
EP0000271A1
EP0000271A1 EP78300075A EP78300075A EP0000271A1 EP 0000271 A1 EP0000271 A1 EP 0000271A1 EP 78300075 A EP78300075 A EP 78300075A EP 78300075 A EP78300075 A EP 78300075A EP 0000271 A1 EP0000271 A1 EP 0000271A1
Authority
EP
European Patent Office
Prior art keywords
cathode
strips
array
neutral particle
sensor
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.)
Granted
Application number
EP78300075A
Other languages
German (de)
English (en)
Other versions
EP0000271B1 (fr
Inventor
James Edmond Bateman
John Francis Connolly
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.)
BTG International Ltd
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Publication of EP0000271A1 publication Critical patent/EP0000271A1/fr
Application granted granted Critical
Publication of EP0000271B1 publication Critical patent/EP0000271B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
    • H01J47/06—Proportional counter tubes

Definitions

  • multiwire proportional counters normally used to detect charged particles in the field of high energy physics, can also be used to detect neutral particles.
  • A.P. Jevon et al summarise the possible approaches and describe a device in which incident gama rays are absorbed in a matrix structure of a suitable converting solid material such as a lead alloy; photoelectrone are produced in the converter and escape into the voids in the matrix which contain a typical gas mixture, and secondary electrons are released in the gas.
  • An electric field is applied to the matrix to cause the secondary electrons to drift onto a conventional multiwire proportional counter at one end of the matrix.
  • each cathode array and sensing in at least one strip of each cathode array the presence of an electrical charge induced by the electrical field surrounding said positive ions in the avalanche.
  • an anode array between and parallel to the cathode arrays and comprising a plurality of spaced metal wires
  • a position-sensitive neutral particle sensing system comprises a multiple particle sensor, and means for sensing the presence of an induced electrical charge in at least one strip in each cathode array of at least one sensor and for providing an output signal representing an orthogonal position in the at least one sensor.
  • a multiplicity of particles will be received, and a display corresponding to each sensed particle will be provided at the corresponding orthogonal position on a two- dimensional display device, such as a cathode ray tube.
  • a gamma camera or an X-ray camera comprises a position-sensitive'neutral particle sensing system, and a collimator arranged to allow passage of neutral particles only in a direction substantially perpendicular to each cathode plane of each sensor.
  • the anode wires are arranged at 45° to the cathode strips. This is not essential; the wires can be parallel to one array of strips, or make an angle other than 0 , 450 or 90 0 with the cathode strips.
  • a gas (not known) such as the gas used in a conventional multiwire proportional counter, is supplied to surround the cathode and anode arrays.
  • each cathode array Since the strips in each cathode array are arranged orthogonally, the x-y co-ordinates of the electron avalanche, and thus the position of the received neutral particle, can be determined.
  • Such an arrangement of delay lines and time measurement means is well known in the field of multiwire proportional counters.
  • each cathode strip in Figure 2 may be made of gadolinium about 10 microns thick.
  • a bussed arrangement allows a much simpler readout system to be used.
  • the anode arrays are not bussed vertically, because a signal indicating in which anode plane an electron avalanche is received may be required to give the z co-ordinate.

Landscapes

  • Measurement Of Radiation (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP19780300075 1977-06-24 1978-06-23 Plaque à cathode, détecteur sensible à la position pour particules neutres utilisant une telle plaque à cathode, système détecteur et appareil photographique les deux utilisant un tel détecteur Expired EP0000271B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2659677A GB1583571A (en) 1977-06-24 1977-06-24 Hydrocarbon synthesis from co and h2 with ru ni or rh supported on a titanium oxide
GB2659677 1977-06-24

Publications (2)

Publication Number Publication Date
EP0000271A1 true EP0000271A1 (fr) 1979-01-10
EP0000271B1 EP0000271B1 (fr) 1981-12-02

Family

ID=10246120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780300075 Expired EP0000271B1 (fr) 1977-06-24 1978-06-23 Plaque à cathode, détecteur sensible à la position pour particules neutres utilisant une telle plaque à cathode, système détecteur et appareil photographique les deux utilisant un tel détecteur

Country Status (3)

Country Link
EP (1) EP0000271B1 (fr)
DE (1) DE2861396D1 (fr)
GB (1) GB1583571A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004851A1 (fr) * 1988-10-28 1990-05-03 Schlumberger Industries Procede et dispositif de localisation bidimensionnelle de particules neutres, notamment pour faibles taux de comptage
FR2638536A1 (fr) * 1988-10-28 1990-05-04 Schlumberger Ind Sa Procede et dispositif de localisation de particules neutres pour faibles taux de comptage
FR2638567A1 (fr) * 1988-10-28 1990-05-04 Schlumberger Ind Sa Procede et dispositif de localisation bidimensionnelle de particules neutres
EP0368694A1 (fr) * 1988-10-28 1990-05-16 Schlumberger Industries Procédé et dispositif de localisation de particules neutres, à haute resolution

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477595A (en) * 1982-03-31 1984-10-16 Exxon Research And Engineering Co. Liquid hydrocarbon synthesis using supported ruthenium catalysts
US4513161A (en) * 1984-06-29 1985-04-23 Exxon Research And Engineering Co. Conversion of methanol to hydrocarbons
DE4018859A1 (de) * 1990-06-13 1992-01-02 Besch Hans Juergen Dr Bildgebender detektor fuer (gamma)-strahlung
US6852667B2 (en) 1998-02-16 2005-02-08 Sumitomo Chemical Company Limited Process for producing chlorine
CN1915800B (zh) * 1998-02-16 2011-12-07 住友化学株式会社 氯的制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176496A2 (en) * 1972-03-21 1973-11-02 Commissariat Energie Atomique Neutron detector - with cartesian coordinate beam position read out

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176496A2 (en) * 1972-03-21 1973-11-02 Commissariat Energie Atomique Neutron detector - with cartesian coordinate beam position read out

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol. NS-19, nr. 3, June 1972, New York, USA G. CHARPAK "Some recent progresses in particle detection", pages 152-157. *
KERNENERGIE, vol. 12, nr. 4, april 1969, Berlin, H. HELFER et al. "Ortsempfindliches Paralleldraht-Z{hlrohrsystem", pages 132-133. *
NUCLEAR INSTRUMENTS AND METHODS, vol. 117, nr. 2, 1974, Amsterdam, NL U. SHIMONI et al. "Investigations on metal converters for gamma-ray detection and mapping", pages 599-603. *
NUCLEONICS, vol. 24, nr. 7, july '66 New York USA B.R. PULLAN et al."Measuring radionuclide distribution with crossedwire spark chambers", pages 72-75. *
PHYSICS IN MEDECINE AND BIOLOGY, vol. 20, nr. 1, january 1975, London GB R.A. REYNOLDS et al. "A multiwirre proportional chamber positron camera: initial results", pages 136-141. *
PHYSICS IN MEDECINE AND BIOLOGY, vol. 23, nr. 3, May 1978, London GB J.E. BATEMAN and J.F. CONNOLLY "A multiwire proportional gamma camera for imaging 99Tcm radionuclide distributions", pages 455-470. *
REPORT CERN-77-01, 6 january 1977 Geneva, CH A.P. JEAVONS et al. "A new position-sensitive detector for thermal and epithermal neutrons" Page 1, lines 9-14. *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004851A1 (fr) * 1988-10-28 1990-05-03 Schlumberger Industries Procede et dispositif de localisation bidimensionnelle de particules neutres, notamment pour faibles taux de comptage
FR2638536A1 (fr) * 1988-10-28 1990-05-04 Schlumberger Ind Sa Procede et dispositif de localisation de particules neutres pour faibles taux de comptage
FR2638567A1 (fr) * 1988-10-28 1990-05-04 Schlumberger Ind Sa Procede et dispositif de localisation bidimensionnelle de particules neutres
EP0368694A1 (fr) * 1988-10-28 1990-05-16 Schlumberger Industries Procédé et dispositif de localisation de particules neutres, à haute resolution
FR2639436A1 (fr) * 1988-10-28 1990-05-25 Schlumberger Ind Sa Procede et dispositif de localisation de particules neutres, a haute resolution
US5038043A (en) * 1988-10-28 1991-08-06 Schlumberger Industries High resolution method and apparatus for localizing neutral particles
US5087821A (en) * 1988-10-28 1992-02-11 Schlumberger Industries Method and apparatus for locating photons or neutral particles two-dimensionally, in particular at low counting rates
AU620454B2 (en) * 1988-10-28 1992-02-20 Schlumberger Industries High resolution method and apparatus for localizing neutral particles

Also Published As

Publication number Publication date
GB1583571A (en) 1981-01-28
DE2861396D1 (en) 1982-01-28
EP0000271B1 (fr) 1981-12-02

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