Thermal and fast neutron detection through high-purity single-crystal CVD diamonds

Lee, Chul-Yong; Ban, Chae-Min; Lee, Han-Rim; Choo, Kee-Nam; Jun, Byung‐Hyuk

doi:10.1016/j.apradiso.2019.06.025

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…This high energy resolution comes from the high performance of both the diamond film and the electrode. The strip-patterned electrode differs from all other reported double-flat electrodes [12,17,[21][22][23][24][25][26]. Although this design increases the effective detection area of the detector and reduces the reaction between gold atoms and neutrons because the collision cross section between gold atoms and 14.1 MeV neutrons (5.295) is four times higher than that between diamond atoms and neutrons (1.329), this performance improvement is limited because the thickness of the electrode is of the order of 10 nm while the detector is 500 μm.…”

Section: Conclusion and Discussionmentioning

confidence: 60%

Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

Zhou

2023

Plasma Sci. Technol.

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A single-crystal diamond detector is fabricated to diagnose 14.1 MeV deuterium-tritium (D-T) fusion neutrons. The size of its diamond film is 4.5mm×4.5mm×500μm. This film is then sandwiched by a flat and a strip-pattern gold electrode. The dark current of this detector is experimentally measured to be lower than 0.1 nA under electric field of 30kV/cm. This diamond detector is used to measure the D-T fusion neutrons which has a flux of about 7.5×105/(s·cm2). The pronounced peak with a central energy of 8.28 MeV which characterizing 12C(n,α)9Be reaction in the neutron energy spectrum is experimentally diagnosed, and the energy resolution is better than 1.69%, which is the best result reported so far by using a diamond detector. A clear peak with a central energy of 6.52 MeV which characterizing 12C(n,n')3α reaction is also identified with an energy resolution of better than 7.67%.

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Section: Conclusion and Discussionmentioning

confidence: 60%

Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

Zhou

2023

Plasma Sci. Technol.

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“…Уникальные электрофизические свойства алмаза, как полупроводника с шириной запрещенной зоны 5.45 eV [1]: высокие подвижности (до ∼ 4000 cm 2 /(V • s)) и скорость дрейфа (∼ 10 7 cm/s) носителей заряда [2], высокое поле электрического пробоя, рекордно высокая теплопроводность (до 24 (W/cm • K)), широкий температурный диапазон работы (до 700 • C), высокая радиационная стойкость [3][4][5], высокая (в некоторых условиях до 100%) эффективность сбора носителей заряда обеспечивают возможность создания радиационно-стойких детекторов ионизирующих излучений [6] и других высокозагруженных модулей алмазной электроники для применения в физике высоких энергий, в ряде отраслей, использующих ядерные технологии, в исследованиях термоядерной плазмы [7][8][9][10][11][12][13][14]. В конструкции детектора алмаз является твердотельной ионизационной камерой со сбором зарядов на электродах, располагаемых на двух сторонах алмазной пластины.…”

Section: Introductionunclassified

Синтез CVD-алмаза Детекторного Качества Для Радиационно-Стойких Детекторов Ионизирующего Излучения

Красильников¹,

Родионов²,

Большаков³

et al. 2022

Журнал Технической Физики

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An advanced microwave plasma reactor ARDIS 300 was used to synthesize homoepitaxial structures of monocrystal diamond films at Project Center ITER. High-quality epitaxial diamond films were grown on boron-doped monocrystal diamond substrates using microwave plasma-assisted chemical vapor deposition from methane-hydrogen mixture. Structural and impurity perfection of diamond films were characterized by Raman spectroscopy, photoluminescence, and optical absorption. Prototypes of radiation detectors were created on the basis of grown diamond films with thickness 70-80 μm. The p-type substrate with boron concentration ~100 ppm served as an electrical contact. Detectors were irradiated by 5.5 MeV α-particles and 14.7 MeV neutrons, corresponding pulse height spectra were measured and detector sensitivities were determined. Charge collection efficiency for synthesized diamond was shown to achieve 94% and 91% when ~4 V/m electric field applied.

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“…The unique electrophysical properties of diamond as a semiconductor with a bandgap of 5.45 eV [1] (high mobilities (up to ∼ 4000 cm 2 /(V • s)) and drift velocity (∼ 10 7 cm/s) of charge carriers [2], high dielectric breakdown field, record-high thermal conductivity (up to 24 (W/cm • K)), wide operating temperature range (up to 700 • C), high radiation resistance [3][4][5], and high (up to 100% under certain conditions) efficiency of carrier collection) provide an opportunity to design radiationhardened ionization radiation detectors [6] and other highload diamond electronic modules to be applied in highenergy physics, in certain branches of industry utilizing nuclear technology, and in research into thermonuclear plasma [7][8][9][10][11][12][13][14]. In a detector structure, diamond is a solidstate ionization chamber with charge collection at electrodes positioned on both sides of a diamond plate.…”

Section: Introductionmentioning

confidence: 99%

CVD-synthesis of detector quality diamond for radiation hardness detectors of ionizing radiation

A.V.¹,

N.B.²,

A.P.

et al. 2022

Technical Physics

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An advanced microwave plasma reactor ARDIS 300 was used to synthesize homoepitaxial structures of monocrystal diamond films at Project Center ITER. High-quality epitaxial diamond films were grown on boron-doped monocrystal diamond substrates using microwave plasma-assisted chemical vapor deposition from methane-hydrogen mixture. Structural and impurity perfection of diamond films were characterized by Raman spectroscopy, photoluminescence, and optical absorption. Prototypes of radiation detectors were created on the basis of grown diamond films with thickness 70-80 μm,. The p-type substrate with boron concentration ~100 ppm served as an electrical contact. Detectors were irradiated by 5.5 MeV particles and 14.7 MeV neutrons, corresponding pulse height spectra were measured and detector sensitivities were determined. Charge collection efficiency for synthesized diamond was shown to achieve 94% and 91% when ~ 4 V/μm electric field applied. Keywords: diamond films, epitaxy, diamond detector

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Thermal and fast neutron detection through high-purity single-crystal CVD diamonds

Cited by 8 publications

References 20 publications

Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

Синтез CVD-алмаза Детекторного Качества Для Радиационно-Стойких Детекторов Ионизирующего Излучения

CVD-synthesis of detector quality diamond for radiation hardness detectors of ionizing radiation

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