Thomson scattering diagnostics at the Globus M2 tokamak
Abstract
The paper is devoted to the Thomson scattering (TS) diagnostics recently developed for the Globus-M2 spherical tokamak and prototyping the ITER divertor TS diagnostics. The distinctive features of the system are the use of spectrometers, acquisition system and lasers that meet the base requirements for ITER TS diagnostics. The paper describes the diagnostic system that allows precise measurements of TS signals, as well as the results of the first measurements of electron temperature and density in both central region of the plasma column and scrape-off layer. The system provides measurements of electron temperature in the range of 5 eV to 5 keV and density in the range of . The use of two ITER-grade probing lasers of different wavelengths (Nd:YAG 1064.5 nm and Nd:YLF 1047.3 nm) allows reliable measurement of in multi-colour mode, i.e., assuming that spectral calibration is unknown.
Cite
@article{arxiv.2311.18723,
title = {Thomson scattering diagnostics at the Globus M2 tokamak},
author = {Zhiltsov N. S. and Kurskiev G. S. and Tolstyakov S. Yu. and Solovey V. A. and Koval A. N. and Aleksandrov S. E. and Bazhenov A. N. and Chernakov P. V. and Filippov S. V. and Gusev V. K. and Khromov N. A. and Kiselev E. O. and Kornev A. F. and Krikunov S. V. and Makarov A. M. and Minaev V. B. and Miroshnikov I. V. and Mukhin E. E. and Novokhatsky A. N. and Patrov M. I. and Petrov Yu. V. and Sakharov N. V. and Schegolev. P. B. and Telnova A. Yu. and Tkachenko E. E. and Tokarev V. A. and Varfolomeev V. I. and Voronin A.},
journal= {arXiv preprint arXiv:2311.18723},
year = {2024}
}