ITER relevant developments in neutron diagnostics during the JET Trace Tritium campaign

Bertalot, L.; Adams, J. M.; Angelone, M.; Conroy, S.; Esposito, B.; Kaschuck, Yu. A.; Henriksson, H.; Lamalle, P.; Marocco, D.; Murari, A.; Hawkes, N. P.; Pillon, M.; Popovichev, S.; Reginatto, Marcel; Riva, M.; Schuhmacher, H.; Stork, D.; Zastrow, K.‐D.; Zimbal, A.

doi:10.1016/j.fusengdes.2005.06.213

Cited by 19 publications

(20 citation statements)

References 11 publications

(12 reference statements)

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“…This has been done for ITER diagnostics and the following table 11 is based on a longer and more detailed table presented by Bertalot [37]. The following short sections report comments on the diagnostic systems.…”

Section: Neutron Measurementsmentioning

confidence: 99%

Diagnostics and control for the steady state and pulsed tokamak DEMO

Orsitto¹,

Villari²,

Moro³

et al. 2016

Nucl. Fusion

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The present paper is devoted to a first assessment of the DEMO diagnostics systems and controls in the context of pulsed and steady state reactor design under study in Europe. In particular, the main arguments treated are: (i) The quantities to be measured in DEMO and the requirements for the measurements; (ii) the present capability of the diagnostic and control technology, determining the most urgent gaps, and (iii) the program and strategy of the research and development (R&D) needed to fill the gaps. Burn control, magnetohydrodynamic stability, and basic machine protection require improvements to the ITER technology, and moderated efforts in R&D can be dedicated to infrared diagnostics (reflectometry, electron cyclotron emission, polarimetry) and neutron diagnostics. Metallic Hall sensors appear to be a promising candidate for magnetic measurements in the high neutron fluence and long/steady state discharges of DEMO.

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Section: Neutron Measurementsmentioning

confidence: 99%

Diagnostics and control for the steady state and pulsed tokamak DEMO

Orsitto¹,

Villari²,

Moro³

et al. 2016

Nucl. Fusion

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“…With this configuration of the chords, the spatial resolution of the system in the centre is better than 10 cm. On each line of sight three different detectors are installed [4]:…”

Section: Neutron Diagnosticsmentioning

confidence: 99%

“…Some recent JET campaigns, with the introduction of trace amount (n T /n D <5%) of tritium into D plasmas and third harmonic ICRH acceleration of 4 He, provided unique opportunities to test "burning plasma" diagnostics. In particular new approaches and techniques were investigated for the detection of neutrons, a particles and the fuel mixture.…”

Section: Introductionmentioning

confidence: 99%

New developments in JET neutron, γ-ray and particle diagnostics with relevance to ITER

et al. 2005

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Some recent JET campaigns, with the introduction of a trace amount (n T /n D < 5%) of tritium into D plasmas and third harmonic ICRH acceleration of 4 He, provided unique opportunities to test 'burning plasma' diagnostics. In particular, new approaches and techniques were investigated for the detection of neutrons, α particles and the fuel mixture. With regard to neutron detection, the recent activity covered aspects such as calibration and cross validation of the diagnostics, measurement of the spatial distribution of the neutrons, particle transport and neutron spectrometry. The first tests of some new neutron detection technologies were also undertaken during the Trace Tritium Experiment campaign. To improve JET's diagnostic capability in the field of α particles, a significant development programme was devoted to the measurement of their confinement and imaging with γ -ray spectroscopy. A new approach for the fusion community to measuring the fast ion losses, based on the activation technique, was also attempted for the first time on JET. An assessment of the neutral particle analyser's potential to determine the fuel mixture and the particle transport coefficients is under way.

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“…A similar type of neutron detector was operational with an analog acquisition system at the Joint European Torus (JET) (Culham, England) during the Trace-Tritium Experiment (TTE) in 2003 [4] [9]. The spectrometer implemented a control and monitoring system (C&M) based on a light emitting diode (LED) to cope with the gain variations of the photomultiplier tube (PMT) induced by count rate variations.…”

Section: Introductionmentioning

confidence: 99%

The compact neutron spectrometer at ASDEX Upgrade

Giacomelli

Zimbal

Tittelmeier

et al. 2011

Review of Scientific Instruments

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The first neutron spectrometer of ASDEX Upgrade (AUG) was installed in November 2008. It is a compact neutron spectrometer (CNS) based on a BC501A liquid scintillating detector, which can simultaneously measure 2.45-MeV and 14-MeV neutrons emitted from deuterium (D) plasmas and γ radiation. The scintillating detector is coupled to a digital pulse shape discrimination data acquisition (DPSD) system capable of count rates up to 10 6 s -1 . The DPSD system can operate in acquisition and processing mode. With the latter n-γ discrimination is performed off-line based on the two-gate method. The paper describes the tests of the CNS and its installation at AUG. The neutron emission from the D plasma measured during a discharge with high auxiliary heating power was used to validate the CNS performance. The study of the optimal settings for the DPSD data processing to maximize the n-γ discrimination capability of the CNS is reported. The CNS measured both 2.45-MeV and 14-MeV neutrons emitted in AUG D plasmas with a maximum count rate of 5.4⋅10 5 s -1 (> 10 times higher than similar spectrometers previously achieved) with an efficiency of 9.3⋅10 -10 events per AUG neutron.2

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ITER relevant developments in neutron diagnostics during the JET Trace Tritium campaign

Cited by 19 publications

References 11 publications

Diagnostics and control for the steady state and pulsed tokamak DEMO

Diagnostics and control for the steady state and pulsed tokamak DEMO

New developments in JET neutron, γ-ray and particle diagnostics with relevance to ITER

The compact neutron spectrometer at ASDEX Upgrade

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