Publication

Advances in the FTU collective Thomson scattering system

Cristian Galperti, Gabriele Grosso
2016
Conference Papers

Abstract

The new collective Thomson scattering diagnostic installed on the Frascati Tokamak Upgrade device started its first operations in 2014. The ongoing experiments investigate the presence of signals synchronous with rotating tearing mode islands, possibly due to parametric decay processes, and phenomena affecting electron cyclotron beam absorption or scattering measurements. The radiometric system, diagnostic layout, and data acquisition system were improved accordingly. The present status and near-term developments of the diagnostic are presented.

Official source

https://infoscience.epfl.ch/entities/publication/196e21e9-31c2-40a9-8240-374594c8752c

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Cristian Galperti, Gabriele Grosso
2016
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/196e21e9-31c2-40a9-8240-374594c8752c

About this result

Related concepts (14)

Tokamak

A tokamak (ˈtoʊkəmæk; токамáк) is a device which uses a powerful magnetic field to confine plasma in the shape of a torus. The tokamak is one of several types of magnetic confinement devices being developed to produce controlled thermonuclear fusion power. , it was the leading candidate for a practical fusion reactor. Tokamaks were initially conceptualized in the 1950s by Soviet physicists Igor Tamm and Andrei Sakharov, inspired by a letter by Oleg Lavrentiev. The first working tokamak was attributed to the work of Natan Yavlinsky on the T-1 in 1958.

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Magnetic confinement fusion is an approach to generate thermonuclear fusion power that uses magnetic fields to confine fusion fuel in the form of a plasma. Magnetic confinement is one of two major branches of fusion energy research, along with inertial confinement fusion. The magnetic approach began in the 1940s and absorbed the majority of subsequent development. Fusion reactions combine light atomic nuclei such as hydrogen to form heavier ones such as helium, producing energy.

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The stability of a plasma is an important consideration in the study of plasma physics. When a system containing a plasma is at equilibrium, it is possible for certain parts of the plasma to be disturbed by small perturbative forces acting on it. The stability of the system determines if the perturbations will grow, oscillate, or be damped out. In many cases, a plasma can be treated as a fluid and its stability analyzed with magnetohydrodynamics (MHD).

Related publications (4)

Advances in the FTU collective Thomson scattering system

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Application of Thomson scattering to helicon plasma sources

Millimeter-wave beam scattering by edge-plasma density fluctuations in TCV

New capabilities of the incoherent Thomson scattering diagnostics in the TCV tokamak: divertor and real-time measurements