Neutron Flux Measurements in ITER-TBM Simulating Assemblies by means of Multi-Foil Activation Method

Ochiai, Kentaro; Tatebe, Yosuke; Kondo, Keitaro; Ohnishi, Seiki; Sato, Satoshi; Takakura, Kei; Konno, Chikara

doi:10.15669/pnst.1.142

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…FIGURE 11 shows the nickel spectrum from the 60 μA−90 kV operation and the background spectrum. 58 Ni(n,p) 58 Co reaction [Och11,Bar95] is ideal to determine the downscattered D-T neutron flux thanks to its relatively large crosssection over a broad energy range from 3 to 13 MeV. Analyzed gamma-ray peaks from nickel foils were from activation of 58…”

Section: Nickelmentioning

confidence: 99%

“…FIGURE 16 shows the zirconium spectrum from the 60 μA−90 kV operation and the background spectrum. The 202.53/479.51 keV peaks from 90 Zr(n,p) 90m Y (T1/2 = 3.19 hours) [Mar90] and 909.15 keV peak from 90 Zr(n,2n) 89 Zr (T1/2 = 78.41 hours) [Och11,Bar95] were analyzed to determine the neutron flux. 90 Zr is a suitable for the D-T neutron activation analysis because of its large (n,2n) cross-section above 9 MeV and its natural abundance of 51.45%.…”

Section: Zirconiummentioning

confidence: 99%

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Determination of the Deuterium-Tritium (D-T) Generator Neutron Flux using Multi-foil Neutron Activation Analysis Method

Lee

Bucher

Krebs

et al. 2019

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The deuterium-tritium (D-T) neutron flux from a Thermo-Fisher™ MP320 neutron generator was determined experimentally in this study. Fast neutron flux from a neutron generator can be measured indirectly using multi-foil activation analysis. Two sets of 12 activation foils each were prepared to cover a broad energy range of fast neutrons (1 -15 MeV), and spectral peak analysis was performed on each activated foil with a mechanically-cooled HPGe detector. A non-negative solution of a linear least squares problem was solved to find a neutron flux energy distribution. The neutron yields of the high-yield (60 μA−90 kV) and low-yield (30 μA−70 kV) settings were determined to be 1.73×10 8 n/s and 2.28×10 7 n/s, respectively. Uncertainties on these neutron yields were estimated using the BC400 scintillator count rates whose fluctuations throughout the irradiations were described by the standard deviations of 10.6 and 8.5%, respectively. Linear relationships between the MP320's neutron flux and a BC400 scintillator as well as a SWENDI-2 neutron dose meter were also derived to utilize them as on-line neutron flux monitors in the future.

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Section: Nickelmentioning

confidence: 99%

Section: Zirconiummentioning

confidence: 99%

Determination of the Deuterium-Tritium (D-T) Generator Neutron Flux using Multi-foil Neutron Activation Analysis Method

Lee

Bucher

Krebs

et al. 2019

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“…on deuterium-deuterium (D-D) and deuterium-tritium (D-T) reaction [23]- [27]. The use of deuterium plasma in the D-D and D-T reactions in fusion reactors [5]- [9], [28]- [30] and the necessity for a stable ECRIS for the generation of 14-MeV neutrons motivate the present research work.…”

mentioning

confidence: 99%

Effect of Microwave Power on Electron Temperature and Electron Density in Deuterium Plasma Generated by Electron Cyclotron Resonance

Mostako

Vala

Makwana

et al. 2016

IEEE Trans. Plasma Sci.

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The desire for continuously gaining new knowledge in fusion reactor technology has pushed the frontier of engineering methods to deliver highly stable ion source for 14-MeV neutron generators. The diagnostic of the ion source of 14-MeV neutron generator is one of the prime concerns for future fusion reactor technology. An accelerator-based 14-MeV neutron generator is developed at Fusion Neutronics Laboratory of Institute for Plasma Research, Gandhinagar, India. The ion source of this 14-MeV neutron generator is diagnosed via the optical emission spectroscopy technique. In order to achieve optimum electron temperature and electron density for stable operation of ion source, the controlling parameters, namely, deuterium ambient gas pressure, ambient gas flow rate, and microwave power coupled to the deuterium plasma, are varied systematically. An investigation on the effect of microwave power coupled with deuterium plasma on the overall electron temperature as well as electron density is investigated in this paper. Prominent Balmer emission lines of deuterium α, β, and γ (D α , D β , and D γ ) are observed in the deuterium plasma generated by electron cyclotron resonance. The overall electron temperature of deuterium plasma is measured by Boltzmann plot at various microwave power, 100-400 W, whereas the electron density is measured by Stark broadening.Index Terms-Deuterium plasma, electron cyclotron resonance, electron density, electron temperature.

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Simulations for practical measurement methods of spatial neutron distribution inside blanket mock-up irradiated with DT neutrons

Ogino

Mukai

Yagi

et al. 2021

Fusion Engineering and Design

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Neutron Flux Measurements in ITER-TBM Simulating Assemblies by means of Multi-Foil Activation Method

Cited by 5 publications

References 3 publications

Determination of the Deuterium-Tritium (D-T) Generator Neutron Flux using Multi-foil Neutron Activation Analysis Method

Determination of the Deuterium-Tritium (D-T) Generator Neutron Flux using Multi-foil Neutron Activation Analysis Method

Effect of Microwave Power on Electron Temperature and Electron Density in Deuterium Plasma Generated by Electron Cyclotron Resonance

Simulations for practical measurement methods of spatial neutron distribution inside blanket mock-up irradiated with DT neutrons

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