DE1090781B - Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers - Google Patents

Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers

Info

Publication number
DE1090781B
DE1090781B DER20792A DER0020792A DE1090781B DE 1090781 B DE1090781 B DE 1090781B DE R20792 A DER20792 A DE R20792A DE R0020792 A DER0020792 A DE R0020792A DE 1090781 B DE1090781 B DE 1090781B
Authority
DE
Germany
Prior art keywords
neutrons
radiation
arrangement
ionization
separate measurement
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.)
Pending
Application number
DER20792A
Other languages
German (de)
Inventor
Dr Boris Rajewsky
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.)
BORIS RAJEWSKY DR
Original Assignee
BORIS RAJEWSKY DR
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 BORIS RAJEWSKY DR filed Critical BORIS RAJEWSKY DR
Priority to DER20792A priority Critical patent/DE1090781B/en
Priority to FR1192749D priority patent/FR1192749A/en
Priority to GB7539/58A priority patent/GB871834A/en
Publication of DE1090781B publication Critical patent/DE1090781B/en
Pending legal-status Critical Current

Links

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
    • H01J47/12—Neutron detector tubes, e.g. BF3 tubes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/185—Measuring radiation intensity with ionisation chamber arrangements

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measurement Of Radiation (AREA)

Description

Anordnung zur getrennten Messung von Neutronen in einer gemischten Strahlung mittels zweier Ionisationskammern Die Erfindung bezieht sich auf eine Anordnung zur getrennten Messung von Neutronen in einer gemischten Strahlung. Es ist bekannt, daß man eine Trennung der gemischten Strahlung nach Komponenten erreichen kann, wenn man zwei Ionisationskammern verwendet, die bei Einfall der gleichen gemischten Strahlung verschieden auf die Strahlungen reagieren.Arrangement for the separate measurement of neutrons in a mixed one Radiation by means of two ionization chambers The invention relates to a Arrangement for the separate measurement of neutrons in a mixed radiation. It it is known that a separation of the mixed radiation according to components can be achieved can, if one uses two ionization chambers, which are mixed at the incidence of the same Radiation react differently to the radiations.

So ist es bekannt, daß die eine Ionisationskammer nur durch die Störstrahlung zur Bildung von Ionisationsströmen angeregt wird, während die andere durch beide Strahlungen, d. h. durch Neutronen und die Störstrahlung angeregt wird. Gegenstand der Erfindung ist nun eine Anordnung, bei der zur getrennten Messung von Neutronen in einer gemischten Strahlung erfindungsgemäß die Gleichheit der von der Störstrahlung erzeugten Ionisationsströme durch Ändern des Potentials eines in der einen lonisationskammer angeordneten Gitters einstellbar ist. Dadurch wird erreicht, daß sich die durch die Störstrahlung erzeugten Ionisationsströme auf einfache Weise auch bei Änderung der Störstrahlung kompensieren lassen.It is known that one ionization chamber is only caused by the interference radiation is excited to form ionization currents, while the other is stimulated by both Radiations, d. H. is excited by neutrons and the interference radiation. object The invention is now an arrangement in which for the separate measurement of neutrons in a mixed radiation, according to the invention, the equality of that of the interference radiation generated ionization currents by changing the potential of one in the one ionization chamber arranged grid is adjustable. This ensures that the the interfering radiation generated ionization currents in a simple manner even when there is a change compensate for the interfering radiation.

Im folgenden ist ein Ausführungsbeispiel unter Bezugnahme auf die schematische Zeichnung erläutert: Die Meßelektrode 10 und die Hochspannungselektroden 20 und 30 sind Hohlkugeln, die konzentrisch angeordnet sind. In dem äußeren Kugelraum zwischen den Elektroden 10 und 20 ist ein Gitter40 isoliert angebracht. Der Raum zwischen 10 und 20 ist mit einem solchen Gas gefüllt und hat derartig ausgebildete Wände, daß nur durch die Störstrahlung Ionen erzeugt werden. The following is an embodiment with reference to FIG schematic drawing explained: The measuring electrode 10 and the high-voltage electrodes 20 and 30 are hollow spheres which are arranged concentrically. In the outer spherical space A grid 40 is insulated between the electrodes 10 and 20. The space between 10 and 20 is filled with such a gas and has such a shape Walls that ions are only generated by the interference radiation.

Der Raum zwischen den Elektroden 10 und 30 ist mit einem solchen Gas gefüllt und mit derartigem Wandmaterial ausgekleidet, daß sowohl von der Störstrahlung wie auch von den Neutronen Ionen erzeugt werden. The space between the electrodes 10 and 30 is one Gas filled and lined with such wall material that both from the interference radiation as well as ions are generated by the neutrons.

Die Spannungen an den Elektroden 20 und 30 sind so ausgewählt, daß die beiden auf die Meßelektrode 10 fließenden Ströme umgekehrtes Vorzeichen haben. The voltages on electrodes 20 and 30 are selected so that the two currents flowing to the measuring electrode 10 have opposite signs.

Die an 40 liegende Spannung ist von einem Spannungsteiler abgegriffen.The voltage at 40 is tapped from a voltage divider.

Die Wirkungsweise der angegebenen Einrichtung ist folgende: Wenn die Störstrahlung auf diese Ionisationskammer fällt, so kann durch Einstellen eines geeigneten Potentials UG am Gitter 40 der lonisationsstrom aus dem Raum zwischen den Elektroden 10 und 20 durch den aus dem Raum zwischen den Elektroden 10 und 30 genau kompensiert werden. The mode of operation of the specified device is as follows: If the interference radiation falls on this ionization chamber, it can be adjusted by setting a suitable potential UG at the grid 40 of the ionization current from the space between electrodes 10 and 20 through the space between electrodes 10 and 30 be precisely compensated.

Wird die so eingestellte Anordnung in ein aus Störstrahlung und Neutronen gemischtes Strahlungsfeld gebracht, so werden nur die Neutronen gemessen, wobei der Meßstrom i an der Elektrode 10 abgenommen wird. The so set arrangement becomes one of interfering radiation and neutrons If a mixed radiation field is brought, only the neutrons are measured, whereby the measuring current i at the electrode 10 is taken.

In weiterer Ausbildung der Erfindung kann man an die einzelnen Gitterdrähte des Gitters 40 verschiedene Spannungen legen; dadurch werden verschiedene Bereiche der Kammer verschieden empfindlich gemacht. In a further embodiment of the invention you can connect to the individual grid wires the grid 40 apply different voltages; this creates different areas the chamber made differently sensitive.

PATENTANSPB UCE Anordnung zur getrennten Messung von Neutronen in einer gemischten Strahlung mittels zweier Ionisationskammern, in denen durch eine Störstrahlung untereinander gleiche Ionisationsströme erzeugt werden, während in der einen Ionisationskammer zusätzlich Ionisationsströme durch Neutronen hervorgerufen werden, dadurch gekennzeichnet, daß die Gleichheit der von der Störstrahlung erzeugten Ionisationsströme durch Ändern des Potentials eines in der einen Ionisationskammer angeordneten Gitters einstellbar ist. PATENTANSPB UCE Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers in which one Interfering radiation generates ionization currents that are the same as one another, while in one ionization chamber additionally caused ionization currents by neutrons are, characterized in that the equality of the generated by the interference radiation Ionization currents by changing the potential of one in one ionization chamber arranged grid is adjustable.

Claims (1)

In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 924226; USA.-Patentschrift Nr 2 480 808. Documents considered: German Patent No. 924226; U.S. Patent No. 2,480,808.
DER20792A 1957-03-16 1957-03-16 Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers Pending DE1090781B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DER20792A DE1090781B (en) 1957-03-16 1957-03-16 Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers
FR1192749D FR1192749A (en) 1957-03-16 1958-03-07 Ionization chamber
GB7539/58A GB871834A (en) 1957-03-16 1958-03-10 Ionisation chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER20792A DE1090781B (en) 1957-03-16 1957-03-16 Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers

Publications (1)

Publication Number Publication Date
DE1090781B true DE1090781B (en) 1960-10-13

Family

ID=7400752

Family Applications (1)

Application Number Title Priority Date Filing Date
DER20792A Pending DE1090781B (en) 1957-03-16 1957-03-16 Arrangement for the separate measurement of neutrons in a mixed radiation by means of two ionization chambers

Country Status (3)

Country Link
DE (1) DE1090781B (en)
FR (1) FR1192749A (en)
GB (1) GB871834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670301A1 (en) * 1990-12-07 1992-06-12 Merlin Gerin Neutron detection device with extended dynamic range for monitoring and controlling nuclear reactors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3007848B1 (en) * 2013-07-01 2017-03-24 Commissariat Energie Atomique DEVICE FOR DETECTING NEUTRONS

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480808A (en) * 1948-05-18 1949-08-30 Well Surveys Inc Multigrid ionization chamber
DE924226C (en) * 1941-04-23 1955-02-28 Siemens Ag Arrangement for measuring the intensity or the dose of neutron beams

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924226C (en) * 1941-04-23 1955-02-28 Siemens Ag Arrangement for measuring the intensity or the dose of neutron beams
US2480808A (en) * 1948-05-18 1949-08-30 Well Surveys Inc Multigrid ionization chamber

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670301A1 (en) * 1990-12-07 1992-06-12 Merlin Gerin Neutron detection device with extended dynamic range for monitoring and controlling nuclear reactors
EP0490783A2 (en) * 1990-12-07 1992-06-17 Merlin Gerin Neutron detection apparatus with extended dynamic range for checking and control of nuclear reactors
EP0490783A3 (en) * 1990-12-07 1992-09-02 Merlin Gerin Neutron detection apparatus with extended dynamic range for checking and control of nuclear reactors
US5192490A (en) * 1990-12-07 1993-03-09 Merlin Gerin Extended range neutron detection device for monitoring and control of nuclear reactors

Also Published As

Publication number Publication date
FR1192749A (en) 1959-10-28
GB871834A (en) 1961-07-05

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