NEUTRON GRID, NEUTRON GRID LAYERED BODY, NEUTRON GRID DEVICE, AND METHOD FOR MANUFACTURING NEUTRON GRID

The neutron grid according to the present invention is provided with: a grid part having a plurality of spacers for transmitting at least a portion of first neutrons passing through an object, and a plurality of absorbers for absorbing at least a portion of second neutrons scattered by the object, t...

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Main Authors FUKUTA Yukihiro, NITTOH Koichi, ADACHI Yoshitaka, NAKASHIMA Nobuaki
Format Patent
LanguageEnglish
French
Japanese
Published 05.10.2017
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Abstract The neutron grid according to the present invention is provided with: a grid part having a plurality of spacers for transmitting at least a portion of first neutrons passing through an object, and a plurality of absorbers for absorbing at least a portion of second neutrons scattered by the object, the spacers and the absorbers being arranged in alternating fashion along a first direction, and extending along a second direction intersecting with the first direction; and a pair of cover members for holding the grid part along a third direction intersecting with the first direction and the second direction, and transmitting at least a portion of the first neutrons and at least a portion of the second neutrons. The difference in the coefficient of thermal expansion between the spacers and the absorbers is ±9×10-6/°C or less, or the Young's modulus of the spacers is 100 GPa or greater. La présente invention concerne une grille de neutrons comprenant: une partie grille dotée d'une pluralité d'éléments d'espacement servant à transmettre au moins une partie de premiers neutrons passant à travers un objet, et d'une pluralité d'absorbeurs servant à absorber au moins une partie de seconds neutrons diffusés par l'objet, les éléments d'espacement et les absorbeurs étant agencés de façon alternée le long d'une première direction et s'étendant le long d'une deuxième direction croisant la première direction; et une paire d'éléments de recouvrement servant à maintenir la partie grille le long d'une troisième direction croisant la première direction et la deuxième direction, et à transmettre au moins une partie des premiers neutrons et au moins une partie des seconds neutrons. La différence de coefficient de dilatation thermique entre les éléments d'espacement et les absorbeurs est de ± 9 × 10-6/°C ou moins, ou le module de Young des éléments d'espacement est de 100 GPa ou plus. 中性子グリッドは、対象物を透過する第1の中性子の少なくとも一部を透過する複数のスペーサと、対象物により散乱された第2の中性子の少なくとも一部を吸収する複数の吸収体と、を有し、スペーサおよび吸収体が第1の方向に沿って交互に配列され且つ第1の方向と交差する第2の方向に沿って延在するグリッド部と、第1の方向および第2の方向と交差する第3の方向に沿ってグリッド部を挟持し且つ第1の中性子の少なくとも一部および第2の中性子の少なくとも一部を透過する一対のカバー材と、を具備する。スペーサと吸収体との間の熱膨張係数差は±9×10-6/℃以内である、またはスペーサのヤング率は100GPa以上である。
AbstractList The neutron grid according to the present invention is provided with: a grid part having a plurality of spacers for transmitting at least a portion of first neutrons passing through an object, and a plurality of absorbers for absorbing at least a portion of second neutrons scattered by the object, the spacers and the absorbers being arranged in alternating fashion along a first direction, and extending along a second direction intersecting with the first direction; and a pair of cover members for holding the grid part along a third direction intersecting with the first direction and the second direction, and transmitting at least a portion of the first neutrons and at least a portion of the second neutrons. The difference in the coefficient of thermal expansion between the spacers and the absorbers is ±9×10-6/°C or less, or the Young's modulus of the spacers is 100 GPa or greater. La présente invention concerne une grille de neutrons comprenant: une partie grille dotée d'une pluralité d'éléments d'espacement servant à transmettre au moins une partie de premiers neutrons passant à travers un objet, et d'une pluralité d'absorbeurs servant à absorber au moins une partie de seconds neutrons diffusés par l'objet, les éléments d'espacement et les absorbeurs étant agencés de façon alternée le long d'une première direction et s'étendant le long d'une deuxième direction croisant la première direction; et une paire d'éléments de recouvrement servant à maintenir la partie grille le long d'une troisième direction croisant la première direction et la deuxième direction, et à transmettre au moins une partie des premiers neutrons et au moins une partie des seconds neutrons. La différence de coefficient de dilatation thermique entre les éléments d'espacement et les absorbeurs est de ± 9 × 10-6/°C ou moins, ou le module de Young des éléments d'espacement est de 100 GPa ou plus. 中性子グリッドは、対象物を透過する第1の中性子の少なくとも一部を透過する複数のスペーサと、対象物により散乱された第2の中性子の少なくとも一部を吸収する複数の吸収体と、を有し、スペーサおよび吸収体が第1の方向に沿って交互に配列され且つ第1の方向と交差する第2の方向に沿って延在するグリッド部と、第1の方向および第2の方向と交差する第3の方向に沿ってグリッド部を挟持し且つ第1の中性子の少なくとも一部および第2の中性子の少なくとも一部を透過する一対のカバー材と、を具備する。スペーサと吸収体との間の熱膨張係数差は±9×10-6/℃以内である、またはスペーサのヤング率は100GPa以上である。
Author ADACHI Yoshitaka
NITTOH Koichi
FUKUTA Yukihiro
NAKASHIMA Nobuaki
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DocumentTitleAlternate 中性子グリッド、中性子グリッド積層体、中性子グリッド装置、および中性子グリッドの製造方法
GRILLE DE NEUTRONS, CORPS STRATIFIÉ DE GRILLE DE NEUTRONS, DISPOSITIF À GRILLE DE NEUTRONS ET PROCÉDÉ DE FABRICATION D'UNE GRILLE DE NEUTRONS
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Snippet The neutron grid according to the present invention is provided with: a grid part having a plurality of spacers for transmitting at least a portion of first...
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SubjectTerms INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASUREMENT OF NUCLEAR OR X-RADIATION
MEASURING
PHYSICS
TESTING
Title NEUTRON GRID, NEUTRON GRID LAYERED BODY, NEUTRON GRID DEVICE, AND METHOD FOR MANUFACTURING NEUTRON GRID
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