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ICFDT7 - 7th International Conference on Frontier in Diagnostic Technologies

21–23 Oct 2024
Europe/Rome timezone

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Session

Diagnostic for Density and Temperature

23 Oct 2024, 09:00

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  1. 49. Experience on the interferometry and polarimetry for fusion reactors
    Dr Alexandru Boboc (UKAEA)
    23/10/2024, 09:00
    Diagnostic for Density and Temperature
    Tutorial

    Alexandru Boboc the JET Operations Team*
    UKAEA, Culham Campus, Abingdon, OX14 3DB, UK
    * See the author list of ‘JET machine operations in tritium & D-T’ by D B King et al., to be published in Nuclear Fusion Special Issue: Overview and Summary Papers from the 29th Fusion Energy Conference (London, UK, 16-21 October 2023)
    E-mail: Alexandru.Boboc@ukaea.uk
    After more than half a century of...

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  2. 89. Measurements of electron temperature in Tokamak Fusion Power Plants
    Dr francesco paolo orsitto (ENEA Frascati)
    23/10/2024, 09:30
    Diagnostic for Density and Temperature
    Short Talk

    The measurement of electron temperature ( Te) is done in tokamak plasmas mainly by Electron Cyclotron Emission(ECE) and using the Thomson scattered laser radiation(TS).
    Recently these measurements were reviewed in the JET ( Joint European Torus) DTE2 (second deuterium-tritium campaign) and differences Te_ECE – Te_TS were detected in particular at high electron temperature...

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  3. 91. ECE diagnostics for NTM detection and tracking in fusion reactors
    Edoardo Alessi (Istituto per la Scienza e la Tecnologia dei Plasmi, CNR, Milano)
    23/10/2024, 09:40
    Diagnostic for Density and Temperature
    Short Talk

    Magneto-hydrodynamics instabilities (MHD) like Magnetic Islands can appear in the plasma of magnetically confined fusion reactors because of (neo-classical) tearing modes (NTM). NTMs perturb the magnetic equilibrium configuration creating shortcuts for the heat and particle radial transport, hence affecting the confinement, reducing the plasma internal pressure and in turns reducing the...

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  4. 82. A Near Infra-Red dispersion interferometer for ST40 and future fusion reactors
    Graham Naylor
    23/10/2024, 09:50
    Diagnostic for Density and Temperature
    Talk

    Dispersion interferometers are gaining in popularity for the measurement of line-integrated electron density in magnetically confined (MC) plasmas. Systems have been developed for use on several MC devices around the world, mostly using a CO2 laser to produce the fundamental wavelength and frequency doubling crystals such as OPGaAs, AgGaSe2 or ZnGeP2 to generate the second harmonic. Systems...

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  5. 44. Fast Wave Interferometer/Reflectometer for Ion Measurements on DIII-D and Prospects for Magnetic Confinement Fusion Reactors
    Tsuyoshi Akiyama (General Atomics)
    23/10/2024, 10:10
    Diagnostic for Density and Temperature
    Talk

    The index of refraction of a plasma in a magnetic field is described by the ion density n_i, with i=D (deuterium) or H (hydrogen), in the frequency range of the fast wave. Hence, interferometry and reflectometry using the fast wave as a probe wave can provide the ion mass density m_i n_i [1,2] and the isotope ratio n_D⁄(n_D+n_H) [3], respectively. The frequency range of the fast wave for these...

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  6. 96. Thomson Scattering for the DIII-D Tokamak Divertor
    Fenton Glass (General Atomics)
    23/10/2024, 11:00
    Diagnostic for Density and Temperature
    Talk

    Thomson scattering has been utilized as a diagnostic technique for measuring electron temperatures and densities in DIII-D divertor regions since 1995. Together with a range of other divertor-focused diagnostics, Divertor Thomson Scattering system (DTS) has advanced knowledge of divertor detachment, surface material erosion yield and heat fluxes, and enabled validation of boundary codes....

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  7. 36. Overview of the studies towards a Plasma Position Reflectometry System for Divertor Test Tokamak (DTT)
    Filipe José Fernandes Manuel da Silva (Instituto de Plasmas e Fusão Nuclear do Instituto Superior Técnico)
    23/10/2024, 11:20
    Diagnostic for Density and Temperature
    Short Talk

    Plasma Position Reflectometry (PPR) is taking an important role in next generation fusion machines, such as DEMO, as a diagnostic to monitor the position and shape of the plasma, complementing magnetic diagnostics. The Divertor Test Tokamak Facility (DTT) presents itself as the perfect machine to implement, develop and test PPR systems, contributing in this way to the gain of a knowledge...

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