Detection of Internal Transport Barrier in the T-10 Tokamak Using Thomson Scattering Diagnostics

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Abstract

At the T-10 tokamak, the Thomson scattering diagnostics was upgraded in 2016. The new system is based on the Nd: YAG laser with the pulse repetition frequency of 100 Hz; the measurements can be performed every 10 ms during the entire plasma discharge at the spatial resolution of up to 5 mm. Using the upgraded diagnostics, the electron temperature measurements were performed during experimental campaigns of the T-10 tokamak in 2016—2018. In the regimes with the electron cyclotron resonance heating, it was demonstrated that the regions with increased temperature gradients form in the plasma, which was interpreted as the formation of internal transport barrier. The ASTRA-code-based simulations of the current profile time evolution made it possible to correlate the positions of the barrier and the rational surface q = 1.

About the authors

G. M. Asadulin

National Research Centre “Kurchatov Institute”

Author for correspondence.
Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

N. A. Kirneva

National Research Centre “Kurchatov Institute”; National Research Nuclear University “Moscow Engineering Physics Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098; Moscow, 115409

I. S. Bel’bas

National Research Centre “Kurchatov Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

A. V. Gorshkov

National Research Centre “Kurchatov Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

D. S. Panfilov

National Research Centre “Kurchatov Institute”; National Research Nuclear University “Moscow Engineering Physics Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098; Moscow, 115409

S. V. Krylov

National Research Centre “Kurchatov Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

A. R. Nemets

National Research Centre “Kurchatov Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

D. S. Sergeev

National Research Centre “Kurchatov Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

N. A. Solov’ev

National Research Centre “Kurchatov Institute”

Email: asadulingm@gmail.com
Russian Federation, Moscow, 123098

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