Neutronic calculations in support of the design of the ITER High Resolution Neutron Spectrometer

Moro, F.; Esposito, B.; Marocco, D.; Villari, R.; Petrizzi, L.; Sundén, E. Andersson; Conroy, S.; Ericsson, Göran; Johnson, M. Gatu; Dapena, M.

doi:10.1016/j.fusengdes.2011.02.049

Cited by 2 publications

(4 citation statements)

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“…The first term in Eq. (2) represents the coulomb collision and j indicates particles in the background, e.g., d, t, α, proton, 3 He, and electron. The second term represents the effect of nuclear elastic scattering (NES) [9], and k indicates the background ions, e.g., d, t, α, proton, and 3 He.…”

Section: Analysis Model 21 Boltzmann-fokker-planck Modelmentioning

confidence: 99%

“…(2) represents the coulomb collision and j indicates particles in the background, e.g., d, t, α, proton, 3 He, and electron. The second term represents the effect of nuclear elastic scattering (NES) [9], and k indicates the background ions, e.g., d, t, α, proton, and 3 He. We consider the NES scattering between the following: 1) α and D, 2) α and T, 3) α, and 3 He, 4) proton and D, 5) proton and T and 6) proton and 3 He, i.e., (i, k) = (D, α), (T, α), ( 3 He, α), (α, D), (α, T), (α, 3 He), (D, p), (T, p), ( 3 He, p), (p, D), (p, T) and (p, 3 He).…”

Section: Analysis Model 21 Boltzmann-fokker-planck Modelmentioning

confidence: 99%

“…Here E 0 n is the neutron emission energy at the center of mass system, v 0 n is the corresponding velocity, and T denotes the ion temperature. A problem that complicates this measurement has been pointed out in a previous study [3,4]. Because the DT reaction rates are significantly higher than that of the DD reactions during a normal operation in a DT fusion reactor, the deceleration of neutrons in the structural materials caused by the DT reaction are detected as noise for DD signals.…”

Section: Introductionmentioning

confidence: 99%

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Modification of Neutron Emission Spectra and Determination of Fuel Ion Ratio in Beam-Injected Deuterium-Tritium Plasma

Kawamoto

Matsuura

2016

Plasma and Fusion Research

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To stably control and operate a deuterium-tritium (DT) fusion reactor, it is important to accurately obtain the fuel ion ratio n t /n d (n is the number density). Previously, fuel ion ratio diagnostic methods using deuteriumdeuterium (DD) and DT neutron emission rates have been studied. The reaction rate coefficients and neutron emission spectra, i.e., the shape and peak value, are strongly influenced by external plasma heating such as neutron beam injection (NBI) heating. In this paper, we consider the fuel ion ratio diagnostics by directly measuring the neutron emission spectra, including both beam-thermal and beam-beam fusion reactions, in deuterium beaminjected DT plasma. We also evaluate the slowing-down neutron component, i.e., noise, to examine whether the above method can be used for plasma diagnostics. On the basis of Boltzmann-Fokker-Planck and Monte Carlo neutron transport analyses, the applicability of the method to the beam-injected DT plasma is discussed. It is shown that the feasible plasma parameter regions of measuring for fuel ion ratio diagnostics is increased by beam injection and by adopting neutron detector channels shifted to the high-energy side.

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Section: Analysis Model 21 Boltzmann-fokker-planck Modelmentioning

confidence: 99%

Section: Analysis Model 21 Boltzmann-fokker-planck Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modification of Neutron Emission Spectra and Determination of Fuel Ion Ratio in Beam-Injected Deuterium-Tritium Plasma

Kawamoto

Matsuura

2016

Plasma and Fusion Research

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“…Neutron spectra including the scattered neutron component have been determined at the RNC detectors' position by Monte Carlo calculations. The RNC has been included in the latest MCNP ITER 40 • model (Alite-4) and the calculations have been performed using the MCNP5 2 code in full 3-D geometry; details concerning the calculation technique can be found in [34]. The calculated spectra for two RNC LOS are shown in figure 15.…”

Section: Introductionmentioning

confidence: 99%

Combined unfolding and spatial inversion of neutron camera measurements for ion temperature profile determination in ITER

2011

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Measurements of the core ion temperature profile are required in ITER with ±10% accuracy and 100 ms time resolution. The ITER radial neutron camera (RNC), with 45 collimated lines of sight (spanning almost completely a poloidal plasma section) equipped with compact neutron spectrometers, has the potential to provide such spatially resolved temperature information. In this paper a novel technique for the ion temperature profile measurement based on the combination of unfolding and spatial inversion of RNC measurements is presented and applied to the ITER full power standard H-mode deuterium–tritium scenario, assuming the RNC to be equipped with liquid scintillators. Results based on synthetic data suggest that the target accuracy could be reached with a time resolution ⩾200 ms.

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Neutronic calculations in support of the design of the ITER High Resolution Neutron Spectrometer

Cited by 2 publications

References 1 publication

Modification of Neutron Emission Spectra and Determination of Fuel Ion Ratio in Beam-Injected Deuterium-Tritium Plasma

Modification of Neutron Emission Spectra and Determination of Fuel Ion Ratio in Beam-Injected Deuterium-Tritium Plasma

Combined unfolding and spatial inversion of neutron camera measurements for ion temperature profile determination in ITER

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