EP2483909B1 - Strahlungsdetektoren und autoradiografische bildgebungsvorrichtungen mit derartigen detektoren - Google Patents

Strahlungsdetektoren und autoradiografische bildgebungsvorrichtungen mit derartigen detektoren Download PDF

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Publication number
EP2483909B1
EP2483909B1 EP10771801.7A EP10771801A EP2483909B1 EP 2483909 B1 EP2483909 B1 EP 2483909B1 EP 10771801 A EP10771801 A EP 10771801A EP 2483909 B1 EP2483909 B1 EP 2483909B1
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EP
European Patent Office
Prior art keywords
electrons
anode
space
amplification
detector according
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Not-in-force
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EP10771801.7A
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English (en)
French (fr)
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EP2483909A1 (de
Inventor
Dominique Thers
Romain Berny
Hervé CARDUNER
Jérôme DONNARD
Patrick Le Ray
Eric Morteau
Noël SERVAGENT
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Association pour la Recherche et le Developpement des Methodes et Processus Industriels
Universite de Nantes
Institut Mines Telecom IMT
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Association pour la Recherche et le Developpement des Methodes et Processus Industriels
Universite de Nantes
Institut Mines Telecom IMT
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Publication of EP2483909A1 publication Critical patent/EP2483909A1/de
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    • 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
    • H01J47/02—Ionisation chambers

Definitions

  • the diffusion space D has a dimension perpendicular to the input and output electrodes 8 of between 2 mm and 3 cm, for example equal to 2 cm.
  • the cathode 5 consists of a conductive adhesive, for example a copper adhesive, bonded to one side of a microscope glass slide. Sample S being disposed on the opposite side of the microscope slide.
  • a conductive adhesive for example a copper adhesive
  • the energy loss of an electron of 100 keV crossing 1 cm of gas is 3.5 keV and that of a 300 keV electron is 1.9 keV. This results in the respective creation of 97 and 52 electron-ion pairs along their path.
  • the creation of primary ionization charges along the trajectory can then be used to characterize the trace of the electron in the detector by a trajectory tracking method according to the invention.
  • the inner layers of the anode 6 are formed of cross-conducting tracks 18.
  • the tracks 18 extend parallel to the first rows of blocks 15.
  • the tracks 18 extend parallel to second rows of blocks 15, perpendicular to the first.
  • the tiles 15 of a row associated with the X coordinate are located on an inner layer different from that connected to the pavers arranged on a row corresponding to the Y coordinate.
  • the tracks 18 are separated from the pavers 15 by an insulator.
  • each pixel is connected to its track by a metallized hole made by laser drilling. With the placement of the tracks diagonally to the pixels, the playback pitch of the tracks is thus 282.84 microns. This pixel pitch is one of the best granularities realized to date in view of the surface for this type of gas detector.
  • a detector according to the invention may comprise more than two amplifying structures.

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  • Measurement Of Radiation (AREA)

Claims (11)

  1. Strahlungsdetektor, umfassend:
    - ein Gehäuse (2), welches ein Medium enthält, welches dazu eingerichtet ist, Elektronen unter Strahlungseinwirkung zu erzeugen,
    - eine Kathode (5), durch welche die zu detektierenden Strahlungen hindrchtreten,
    - eine Anode (6) zum Erzeugen von Signalen als Funktion eines durch die Verlagerung von Ladungen in der Nachbarschaft dieser Anode (6) erzeugten Stroms, wobei diese Ladungen Elektronen entsprechen, von welchen diese Strahlungen ursprünglich direkt oder indirekt stammen,
    - Mittel zur Polarisation (10), welche ein elektrisches Feld erzeugen, welches dazu eingerichtet ist, Elektronen in eine Richtung zu beschleunigen, welche von der Kathode (5) zu der Anode (6) verläuft,
    - eine Verstärkerstruktur (7), welche zwischen der Kathode (5) und der Anode (6) angeordnet ist, umfassend einen Verstärkerraum (A) für Elektronen, welcher zwischen einer Eingangselektrode (8) und einer Ausgangselektrode (9) abgegrenzt ist, wobei die Eingangselektrode (8) und die Ausgangselektrode (9) derart eingerichtet sind, dass in dem Verstärkerraum ein erstes elektrisches Feld (E2) herrscht, welches derart eingerichtet ist, dass Elektroden durch eine Lawine in dem Verstärkerraum erzeugt werden, wobei der Verstärkerraum an wenigstens einer Öffnung (12) der Ausgangselektrode (9) mündet, um wenigstens einen Teil der durch die Lawine erzeugten Elektronen passieren zu lassen,
    - einen Diffusionsraum (D), welcher zwischen der Ausgangselektrode (9) und der Anode (6) angeordnet ist, in welchem ein zweites elektrisches Feld (E3) herrscht, welches für eine Diffusion in Richtungen senkrecht zu diesem Feld (E3) von Elektroden eingerichtet ist, durch Diffusion an den Atomen und Molekülen des in dem Behälter (2) enthaltenen Mediums,
    wobei das Medium, welches dazu eingerichtet ist, Elektroden unter Strahlungseinwirkung zu erzeugen, ein Gas umfasst, welches eine Mischung aus wenigstens 50% von einem Edelgas und Kohlenstoffdioxid umfasst, wobei der Verstärkerraum zu wenigstens 90 Volumen-% durch das Gas gebildet ist, dadurch gekennzeichnet, dass der Abstand (e), welcher die Eingangselektrode (8) und Ausgangselektrode (9) trennt, größer als 500 µm und kleiner oder gleich 1,5 mm ist.
  2. Detektor nach Anspruch 1, wobei die Eingangselektrode der Verstärkerstruktur (7) der Kathode (5) entspricht.
  3. Detektor nach einem der Ansprüche 1 oder 2, wobei die Eingangselektrode (8) durch eine wenigstens teilweise leitfähige Fläche einer Probe (S) gebildet ist, welche Strahlungen emittiert.
  4. Detektor nach einem der vorhergehenden Ansprüche, wobei das Medium, welches dazu eingerichtet ist, Elektronen unter Strahlungseinwirkung zu erzeugen, ein Gas umfasst, welches eine Mischung aus Neon und Kohlenstoffdioxid umfasst, wobei das Neon wenigstens 85 und höchstens 95 Volumen-% der Mischung darstellt.
  5. Detektor nach einem der vorhergehenden Ansprüche, wobei die Verstärkerstruktur derart eingerichtet ist, dass zwischen der Eingangselektrode und der Ausgangselektrode ein elektrisches Feld von wenigstens 2,5 kV/cm herrscht.
  6. Detektor nach einem der vorhergehenden Ansprüche, ferner umfassend eine zweite Verstärkerstruktur (30), welche zwischen dem Diffusionsraum (D) und der Anode (6) angeordnet ist, umfassend eine zweite Eingangselektrode (31) und eine zweite Ausgangselektrode (32), umfassend wenigstens einen Verstärkerraum (A2) für Elektronen, wobei die zweite Eingangselektrode (31) und die zweite Ausgangselektrode (32) derart eingerichtet sind, dass durch eine Lawine in dem Verstärkerraum (A2) Elektronen erzeugt werden, wobei der Diffusionsraum (D) an wenigstens einer Öffnung der Eingangselektrode (31) mündet, wobei die zweite Verstärkerstruktur derart eingerichtet ist, dass ihre Verstärkung größer oder gleich 5000 ist.
  7. Detektor nach Anspruch 6, wobei die zweite Ausgangselektrode (32) der Anode (6) entspricht.
  8. Detektor nach einem der vorhergehenden Ansprüche, wobei die Eingangselektrode (8) und Ausgangselektrode (9) aus Mikrogittern gebildet sind, welche eine Auflösung aufweisen, welche zwischen 500 und 2000 Ipi beträgt (zwischen 19,7 Linien pro mm und 78,7 Linien pro mm).
  9. Detektor nach Anspruch 8, wobei die Mikrogitter einen Maschenparameter aufweisen, welcher zwischen 30 und 50 µm beträgt.
  10. Vorrichtung zur auto-radiografischen Bildgebung, umfassend einen Detektor nach einem der vorhergehenden Ansprüche und einen Probenträger, wobei die Kathode durch eine wenigstens teilweise leitfähige Probe gebildet ist, welche auf dem Probenträger angeordnet ist.
  11. Verfahren zum Bestimmen der Emissionsposition von durch eine Anode eines Detektors nach einem der Ansprüche 1 bis 9 detektierten Elektronen, umfassend die folgenden Schritte:
    Bestimmen der Koordinaten eines Punkts A, welcher den mittleren Interaktionen von Elektronen in dem Diffusionsraum (D) entspricht,
    Bestimmen von Koordinaten eines Punkts B, welcher den mittleren Interaktionen von Elektronen in dem Verstärkungsraum (A) der Verstärkerstruktur (7) entspricht,
    - Bestimmen des Emissionspunkts als den Punkt, welcher den Schnittpunkt der Geraden (TC) repräsentiert, welche durch die Punkte A und B und die Referenz-Höhenebene läuft.
EP10771801.7A 2009-09-29 2010-09-29 Strahlungsdetektoren und autoradiografische bildgebungsvorrichtungen mit derartigen detektoren Not-in-force EP2483909B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0956745A FR2950731B1 (fr) 2009-09-29 2009-09-29 Detecteurs de radiations et dispositifs d'imagerie autoradiographique comprenant de tels detecteurs
PCT/FR2010/052049 WO2011039473A1 (fr) 2009-09-29 2010-09-29 Detecteurs de radiations et dispositifs d'imagerie autoradiographique comprenant de tels detecteurs

Publications (2)

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EP2483909A1 EP2483909A1 (de) 2012-08-08
EP2483909B1 true EP2483909B1 (de) 2018-09-05

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EP10771801.7A Not-in-force EP2483909B1 (de) 2009-09-29 2010-09-29 Strahlungsdetektoren und autoradiografische bildgebungsvorrichtungen mit derartigen detektoren

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EP (1) EP2483909B1 (de)
FR (1) FR2950731B1 (de)
WO (1) WO2011039473A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2603129C2 (ru) * 2012-06-08 2016-11-20 Сименс Акциенгезелльшафт Детектор излучения, в частности электромагнитного излучения большой мощности
FR3075980B1 (fr) 2017-12-22 2020-07-31 Areva Mines Procede d'analyse a l'aide d'un detecteur de particules alpha
FR3145420B1 (fr) 2023-01-31 2025-01-17 Orano Mining Procédé et ensemble de caractérisation d’un échantillon solide susceptible de contenir un élément radioactif se désintégrant suivant une chaîne de désintégration par émission de particules α et/ou β

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739941B1 (fr) 1995-10-11 1997-11-14 Commissariat Energie Atomique Detecteur de position, a haute resolution, de hauts flux de particules ionisantes
US6011265A (en) * 1997-10-22 2000-01-04 European Organization For Nuclear Research Radiation detector of very high performance
US6429578B1 (en) * 1999-01-26 2002-08-06 Mats Danielsson Diagnostic and therapeutic detector system for imaging with low and high energy X-ray and electrons
FR2837000B1 (fr) * 2002-03-08 2004-07-02 Biospace Instr Detecteurs de radiations et dispositifs d'imagerie autoradiographique comprenant de tels detecteurs
FR2912837B1 (fr) * 2007-02-20 2009-05-22 Ensmse Dispositif de multiplication des electrons et systeme de detection de rayonnements ionisants

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EP2483909A1 (de) 2012-08-08
FR2950731B1 (fr) 2012-04-13
FR2950731A1 (fr) 2011-04-01
WO2011039473A1 (fr) 2011-04-07

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