Calculation and measurement of 235U and 238U fussion counter assembly detection efficiency

Swinhoe, Martyn T; Jarvis, O.N.

doi:10.1016/0167-5087(84)90020-6

Cited by 26 publications

(17 citation statements)

References 3 publications

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“…It consists of a three sets of fission chambers arranged around the machine. Each set comprises a U 235 and U 238 chambers operating in pulse counting and current mode [13]. Together, the two types of chambers allow reliable detection of the neutron emissions from 10 10 to 10 20 n/s.…”

Section: Resultsmentioning

confidence: 99%

Neutron detection at jet using artificial diamond detectors

Pillon

Angelone

Lattanzi

et al. 2007

Fusion Engineering and Design

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Section: Resultsmentioning

confidence: 99%

Neutron detection at jet using artificial diamond detectors

Pillon

Angelone

Lattanzi

et al. 2007

Fusion Engineering and Design

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“…The activation method using delayed neutrons has been successfully applied in large fusion devices [11,13,[17][18][19]. This variant of the activation method is implemented on JET together with the standard activation method based on gamma-spectrometry.…”

Section: Activation Methods Of Neutron Measurements Based On Delayed Nmentioning

confidence: 99%

Review of Neutron Diagnostics Based on Fission Reactions Induced by Fusion Neutrons

Woźnicka

2018

J Fusion Energ

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Neutrons are an exceptional diagnostic signature in magnetic fusion experiments with high temperature plasma. A part of neutron detection methods relies on detecting nuclear reactions products, initiated by neutrons. Among different possibilities, the neutron-induced fission reactions can be used. These methods use the specific properties of the radioactive decay phenomena induced by neutrons of heavy elements like uranium or thorium. The neutron-induced fission reactions produce energetic fission fragments that can be detected in a special type of ionization chambers that has one of electrode covered with fissionable material. A fission reaction may be also adapted to neutron detection by activation method. A dedicated target-sample made from fissionable isotope (like 235 U, 238 U, 232 Th), irradiated by neutrons, is the source of prompt and delayed neutrons. The decay curve of delayed neutrons can be registered almost immediately after irradiation by fusion neutrons, with a delay resulting exclusively from the time of transport of the samples to the measuring set-up. The yield of a fusion neutron source can be calculated from that measurement. Fission phenomena and fissionable materials are applicable in plasma neutron diagnostics. The lecture gives the introduction to the nuclear fission process and the particular attention is done to the phenomenon and physics of delayed neutrons which are generated during the fission reaction. Examples of delayed neutrons activation set-up and fission chambers dedicated for tokamaks are presented.

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“…At JET, fission counters [5] are the standard diagnostics for the time-resolved neutron emission measurements. However, the fission counters do not discriminate between 2.5 MeV and 14 MeV neutron emission, corresponding to neutrons produced in D-D fusion and D-T fusion, respectively.…”

Section: Neutron Rate Measurements At Jetmentioning

confidence: 99%

Progress in neutron diagnostics at JET

Mlynář

Bonheure²,

Murari

et al. 2006

Czech J Phys

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In the ITER tokamak, diagnosing the plasma neutron emission will be essential to characterise fusion burning process and determine the performance of the machine. JET, currently the world largest tokamak, is the most suitable test bed for development of the fusion-relevant neutron diagnostics due to its plasma parameters and unique tritium operation capability. Current works aim at improving the spatial and spectral characteristics of the neutron measurements at JET, as well as on technological tasks. The present enhancements of neutron diagnostics and data analyses at JET make -together with new fast particle measuring techniques and tritium retention studies -part of the "burning plasma" diagnostic developments towards reactor-grade fusion facilities.PACS : 52.55.Fa

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Calculation and measurement of 235U and 238U fussion counter assembly detection efficiency

Cited by 26 publications

References 3 publications

Neutron detection at jet using artificial diamond detectors

Neutron detection at jet using artificial diamond detectors

Review of Neutron Diagnostics Based on Fission Reactions Induced by Fusion Neutrons

Progress in neutron diagnostics at JET

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