Neutron spectrometry at JET (invited)

Jarvis, O.N.; Gorini, G.; Hone, M.; Källne, J.; Sadler, G.; Merlo, V.; Belle, P. van

doi:10.1063/1.1138559

Cited by 33 publications

(23 citation statements)

References 7 publications

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“…There is a quite broad range of techniques and detectors that can (and have been) used for fusion neutron spectroscopy [26,27]: they span from small compact single detectors/monitors of a few kg to very specialized instrument systems of considerable weight (10's of tons) and size (several m 3 ). Some of the more common techniques are schematically depicted in Fig.…”

Section: Review Of Neutron Spectrometry Techniques: Compact Detectorsmentioning

confidence: 99%

“…8, many of the neutron detection techniques listed in ''The Fusion Plasma as a Neutron Source: The Direct Emission'' section have been tested and used in fusion. JET in particular has over the years had an ambitious program of neutron diagnostics, including, in particular, several different types of neutron spectrometers [26].…”

Section: Review Of Neutron Spectrometry Techniques: Compact Detectorsmentioning

confidence: 99%

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Advanced Neutron Spectroscopy in Fusion Research

Ericsson

2019

J Fusion Energ

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This paper presents a review of the current state-of-the-art neutron spectroscopy in fusion research. The focus is on the fundamental nuclear physics and measurement principles. A brief introduction to relevant nuclear physics concepts is given and also a summary of the basic properties of neutron emission from a fusion plasma. Compact monitors/spectrometers like diamond, CLYC and the liquid scintillator are discussed. A longer section describes in some detail the more advanced, designed systems like those based on the thin-foil proton recoil and time-of-flight techniques. Examples of spectroscopy systems installed at JET and planned for ITER are given.

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Section: Review Of Neutron Spectrometry Techniques: Compact Detectorsmentioning

confidence: 99%

Section: Review Of Neutron Spectrometry Techniques: Compact Detectorsmentioning

confidence: 99%

Advanced Neutron Spectroscopy in Fusion Research

Ericsson

2019

J Fusion Energ

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“…Higher energy resolution is gained at the expense of detection efficiency. Many neutron detector types have been used for neutron spectrometry of tokamak plasmas [43,44,45,46,47,48,49,50]. There have been also several attempts to use solid state detectors, like Silicon diodes or more recently diamond detectors, to measure neutron spectra, with a resolution in the range of 0.8% and an efficiency of about 10 −4 cm 2 .…”

Section: Pos(fnda2006)091mentioning

confidence: 99%

Neutron Diagnostics for Reactor Scale Fusion Experiments

Bonheure¹,

Angelone²,

Barnsley³

et al. 2007

Proceedings of International Workshop on Fast Neutron Detectors and Applications — PoS(FNDA2006)

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8 See annex of Pamela J et al 2003 Overview of recent JET results Nucl.Fusion 43.Fusion is preparing for and moving towards reactor scale plasma experiments. The ITER project requires stepping up the capabilities of neutron measurement systems because in a fusion reactor, measurements of neutron yield and of fusion power and power density are essential. Fast neutron measurement systems for fusion applications include neutron flux measurement systems, neutron imaging systems and neutron spectrometers. The JET tokamak is the most suitable test bed for the development of these systems due to its plasma parameters and unique tritium operation capability. Existing systems include 2 neutron cameras composed of multi-collimator arrays and which allow the development of more advanced applications such as 2-D neutron imaging for the study of critical physical phenomena. The spectral width of the neutron emission should be a reliable indicator of ion temperature in a reactor grade plasma. Therefore, three types of neutron spectrometers are currently being developed. The different approaches, methods and calibration techniques are summarised. Finally, since the needs for development of robust and proved neutron measurement systems for ITER are increasingly recognised, JET has now started a series of interesting technological developments in various fields including new radiation hard detectors, new electronics and data acquisition.

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“…N eu tro n diagnostics are also used to m easure ion tem peratures in d eu teriu m plasm as (Jarvis et al 1987). T h e n eu tro n yield from a d euterium plasm a w ith a M axw ellian-ion distribution is p ro portional to the square of the d euteron density and to a high pow er of the ion tem perature.…”

Section: Plasma Measurements For Jet 53 E Lectron Densitymentioning

confidence: 99%

Plasma measurements for JET

Stott

1987

Phil. Trans. R. Soc. Lond. A

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An important requirement for fusion experiments like JET is the accurate and reliable measurement of the plasma parameters. The most important quantities to be measured include the discharge current, the position and shape of the plasma boundary, the densities and temperatures of the ions and electrons, the concentrations of impurity ions and the various energy input and loss mechanisms. Because all of these quantities vary in space and time, a large number of measurement channels is needed, and a large amount of data is generated for each discharge. Measurements in high-temperature plasmas are difficult because material probes cannot be used except at the extreme edge of the discharge. For measurements in the hot central regions, non-material probes based on electromagnetic radiation or particle beams are used together with analysis of electromagnetic radiation and particles emitted spontaneously from the plasma. A wide variety of experimental techniques is utilized and the application of some of these methods to JET will be described.

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Neutron spectrometry at JET (invited)

Abstract: A diamond based neutron spectrometer for diagnostics of deuterium-tritium fusion plasmas Review of Scientific Instruments 85, 11E101 (2014);

Cited by 33 publications

References 7 publications

Advanced Neutron Spectroscopy in Fusion Research

Advanced Neutron Spectroscopy in Fusion Research

Neutron Diagnostics for Reactor Scale Fusion Experiments

Plasma measurements for JET

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