Fusion product diagnostics based on commercially available chemical vapor deposition diamond detector in large helical device

Ogawa, K.; Isobe, M.; Weiß, C.; Griesmayer, E.; Sangaroon, Siriyaporn; Takada, Eiji; Masuzaki, S.; Ohtani, Hiroaki; Liao, Longyong; Tamaki, Shunsuke; Murata, Isao; Osakabe, M.

doi:10.1088/1748-0221/18/01/p01022

Cited by 6 publications

(4 citation statements)

References 91 publications

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“…The SDD (B12 Knof diamond detector) manufactured by Cividec instrumentation GmbH was used in this study [29]. The active volume was 4.0 × 4.0 × 0.5 mm 3 .…”

Section: Single Crystal Cvd-sddmentioning

confidence: 99%

Simultaneous measurements for fast neutron flux and tritium production rate using pulse shape discrimination and single crystal CVD diamond detector

Kobayashi,

Yoshihashi,

Ogawa

et al. 2024

Nucl. Fusion

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This paper presents the development of a simultaneous measurement method for fast neutron energy spectra and tritium production rates within mixed radiation fields using a single crystal Chemical Vapor Deposition (CVD) diamond detector (SDD) combined with a lithium fluoride (LiF) foil. The method involves the separation of pulses with rectangular shapes and the determination of the depth position within the single crystal diamond (SCD) struck by fast neutrons or nuclear reaction products including recoil tritons from the LiF foil based on pulse width, extracting pulse events occurred at the specific bulk region and the surface region of the SCD. Subsequently, unfolding techniques were employed to analyse the energy deposition spectrum of pulses at the specific bulk region which are induced only by fast neutrons, allowing the deduction of the fast neutron energy spectrum. To evaluate the tritium production rate, the energy deposition spectrum of pulses from events occurring at the SCD surface facing the LiF foil was analysed. By estimating the energy deposition spectrum solely induced by fast neutrons striking the SCD surface and subtracting it from the energy deposition spectrum of events at the SCD surface, the contribution of energetic ions, such as recoil tritons generated by the 6Li(n,α)3H reaction in the LiF foil, was determined. The fast neutron flux and tritium production rate obtained through this study were consistent with particle transport calculations, demonstrating the successful development of a method suitable for performance testing of fusion reactor blankets.

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“…The SDD (B12 Knof diamond detector) manufactured by Cividec instrumentation GmbH was used in this study [29]. The active volume was 4.0 × 4.0 × 0.5 mm 3 .…”

Section: Single Crystal Cvd-sddmentioning

confidence: 99%

Simultaneous measurements for fast neutron flux and tritium production rate using pulse shape discrimination and single crystal CVD diamond detector

Kobayashi,

Yoshihashi,

Ogawa

et al. 2024

Nucl. Fusion

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“…Neutron energy and flux measurements are essential for assessing the ion temperature in future nuclear fusion power plants [1][2][3]. As research in this field advances significantly, neutron detectors capable of withstanding harsh environments are needed.…”

Section: Introductionmentioning

confidence: 99%

Diamond based neutron detector in high temperature environments of 200 °C

Melbinger,

Weiss,

Griesmayer

et al. 2024

J. Inst.

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The stability of the neutron response function and the detection efficiency of a sCVD diamond detector in the temperature range up to 200 °C are demonstrated in this paper. A CIVIDEC neutron detector was simultaneously heated with an AmBe neutron source. This enabled the measurement of the spectrum of the deposited energy in the diamond sensor, i.e. the neutron response function of the detector and the detection rate, which in combination represents the neutron flux as a function of temperature. The measured temperature stability of the neutron response function of the detector and detection rate demonstrates the suitability of sCVD diamond detectors for harsh environments, such as encountered in geodetic applications and nuclear fusion research.

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“…SCD is mainly sensitive to fast neutrons via elastic collisions and 12 C(𝑛, 𝑥) reactions on the carbon nuclei. For neutron with energy of 14 MeV during D-T fusion, peak from 12 C(𝑛, 𝛼) 9 Be reaction can be observed in the spectrum [3,4]. For neutron with energy of 2.45 MeV during D-D fusion, the neutron can mainly undergo elastic collision 12 C(𝑛, 𝑒𝑙) 12 C ★ , causing a continuous scattered spectrum without any prominent peak [5,6].…”

Section: Introductionmentioning

confidence: 99%

Development of diamond detector as fast neutron spectroscopy in the EAST tokamak

Lin,

Zhou,

Artemev

et al. 2024

J. Inst.

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We report in this paper the development of the single crystal diamond detector as a fast neutron spectroscopy in the EAST tokamak. The diamond detector is used to detect the fast neutron directly without any neutron converter during the deuterium-deuterium fusion experiment, then the neutron energy spectrum is reconstructed from the recorded continuous scattered spectrum by using a deconvolution algorithm. The results indicate the capability of the diamond spectroscopy which can be used directly to monitor the fast neutron flux and energy spectrum in the EAST tokamak.

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Fusion product diagnostics based on commercially available chemical vapor deposition diamond detector in large helical device

Cited by 6 publications

References 91 publications

Simultaneous measurements for fast neutron flux and tritium production rate using pulse shape discrimination and single crystal CVD diamond detector

Simultaneous measurements for fast neutron flux and tritium production rate using pulse shape discrimination and single crystal CVD diamond detector

Diamond based neutron detector in high temperature environments of 200 °C

Development of diamond detector as fast neutron spectroscopy in the EAST tokamak

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