Neutron spectrometry in compact ignition experiments

Gorini, G.; Källne, J.

doi:10.1007/bf02456764

Cited by 11 publications

(6 citation statements)

References 27 publications

(18 reference statements)

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“…Quantitative NRCA and NRTA have been used at the TOF-facility GELINA for the analysis of archaeological objects, special nuclear materials and reference samples used for neutron induced cross-section measurements. Special attention is given to improved analysis procedures and to the exploitation of resonance structures for imaging applications within the ANCIENT CHARM project [14].…”

Section: Introductionmentioning

confidence: 99%

Neutron resonance spectroscopy for the characterization of materials and objects

Schillebeeckx¹,

Borella²,

Emiliani³

et al. 2012

J. Inst.

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The resonance structure in neutron induced reaction cross sections can be used to determine the elemental compositions of materials or objects. The occurrence of resonances is the basis of neutron resonance capture analysis (NRCA) and neutron resonance transmission analysis (NRTA). NRCA and NRTA are fully non-destructive methods to determine the bulk elemental composition without the need of any sample preparation and resulting in a negligible residual activity. They have been applied to determine the elemental composition of archaeological objects and to characterize reference materials used for cross section measurements. For imaging applications a position sensitive neutron detector has been developed within the ANCIENT CHARM project. The detector is based on a 10 × 10 array of 6 Li-glass scintillators mounted on a pitch of 2.5 mm, resulting in a 25 × 25 mm 2 active area. The detector has been tested at the time-of-flight facility GELINA and used at the ISIS spallation source to study cultural heritage objects.

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Section: Introductionmentioning

confidence: 99%

Neutron resonance spectroscopy for the characterization of materials and objects

Schillebeeckx¹,

Borella²,

Emiliani³

et al. 2012

J. Inst.

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“…[6], where the Doppler broadening is approximately proportional to the ion thermal velocity and the mean energy is only weakly temperature dependent [7]. The shape of the thermonuclear peak can therefore be used to determine the ion temperature T i which has been demonstrated experimentally [8][9][10] but with limited accuracy and time resolution so far.…”

Section: Introductionmentioning

confidence: 99%

Relativistic calculation of fusion product spectra for thermonuclear plasmas

1998

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The first three moments of the energy distributions of products from fusion reactions in thermonuclear plasmas with Maxwellian ion velocity distributions are determined analytically. Relativistic kinematics is used allowing the desired accuracy to be reached, which is 2 to 3 orders of magnitude better than previous analytical results. In particular, neutron spectra of the reactions D(d,n)3He and D(t,n)α for plasma ion temperatures 0 < Ti < 100 keV are studied for which the results are also given in tabulated form with interpolation formulas for the purpose of practical use. The neutron energy distributions are also calculated with numerical methods, in order to assess the analytical results. High accuracy calculations are motivated by the crucial role that neutron measurements are envisaged to play in the next step fusion experiments on burning plasmas, which are also discussed.

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“…In view of its potential use as a diagnostic on ITER, a prototype version of the MPR will be installed on JET. Both the TOF d and the MPR spectrometers have been proposed for Ignitor (Gorini and Källne 1992) in order to have optimum diagnostic coverage of the different experimental scenarios envisaged.…”

Section: Methodsmentioning

confidence: 99%

“…The projected performance, scope and accuracy of 14 MeV neutron spectrometry measurements on JET and next-step tokamaks are discussed based on different experimental techniques that have been identified. In particular, magnetic proton recoil (MPR) and the time-of-flight (TOF) techniques (Gorini and Källne 1992) are compared considering important differences in characteristics such as detection efficiency and energy resolution.…”

Section: Introductionmentioning

confidence: 99%

Neutron spectrometry diagnostic of triton burn-up in deuterium fusion plasmas

Gorini

Ballabio

Källne

1997

Plasma Phys. Control. Fusion

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Spectrometry measurements of neutrons from triton burn-up can provide information on fast ion confinement in deuterium plasmas. This study concerns the relationship between the burn-up neutron spectrum and the triton slowing-down distribution under classical conditions that are affected by certain additional loss mechanisms. Calculations are presented that illustrate the sensitivity of the neutron burn-up spectrum to changes in the confinement properties of the plasma. The level of statistical accuracy of neutron spectral measurements that could be attained in present and planned next-step tokamak experiments is assessed as well as the feasibility for this type of triton burn-up diagnostic.

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Neutron spectrometry in compact ignition experiments

Cited by 11 publications

References 27 publications

Neutron resonance spectroscopy for the characterization of materials and objects

Neutron resonance spectroscopy for the characterization of materials and objects

Relativistic calculation of fusion product spectra for thermonuclear plasmas

Neutron spectrometry diagnostic of triton burn-up in deuterium fusion plasmas

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