title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐ²ÑÐ·Ð¸ Ñ Ð¿Ð»Ð°Ð·Ð¼Ð¾Ð¹ Ð°Ð½ÑÐµÐ½Ð½Ñ Ð´Ð»Ñ Ð½Ð¸Ð¶Ð½ÐµÐ³Ð¸Ð±ÑÐ¸Ð´Ð½Ð¾Ð¹ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ð¸ ÑÐ¾ÐºÐ° Ð² ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐµ Â«ÐÐ»Ð¾Ð±ÑÑ-Ð2Â»
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Investigation of the lower hybrid antenna coupling efficiency in the Globus-M2 tokamak
Creators: name: ÐÐ°ÑÐµÐµÐ², ÐÐ½Ð´ÑÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: Ð½Ð¸Ð¶Ð½ÐµÐ³Ð¸Ð±ÑÐ¸Ð´Ð½Ð°Ñ Ð²Ð¾Ð»Ð½Ð°
Ð½Ð¸Ð¶Ð½ÐµÐ³Ð¸Ð±ÑÐ¸Ð´Ð½Ð°Ñ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ñ ÑÐ¾ÐºÐ°
ÑÐ²ÑÐ·Ñ Ð°Ð½ÑÐµÐ½Ð½Ñ Ñ Ð¿Ð»Ð°Ð·Ð¼Ð¾Ð¹
ÐÐ»Ð¾Ð±ÑÑ-Ð2
MJ-Ð°Ð½ÑÐµÐ½Ð½Ð°
Ð³ÑÐ¸Ð»Ð»-Ð°Ð½ÑÐµÐ½Ð½Ð°
COMSOL Multiphysics
lower hybrid wave
LHCD
antenna-plasma coupling
Globus-M2
multijunction-antenna
grill-antenna

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ð¼Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½ÑÐ° Ð¾ÑÑÐ°Ð¶ÐµÐ½Ð¸Ñ Ð¡ÐÐ§ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð¾Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² Ð¿Ð»Ð°Ð·Ð¼Ñ Ð²Ð¾ Ð²ÑÐµÐ¼Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ¾Ð² Ð¿Ð¾ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ð¸ Ð½Ð¸Ð¶Ð½ÐµÐ³Ð¸Ð±ÑÐ¸Ð´Ð½ÑÑ ÑÐ¾ÐºÐ¾Ð² ÑÐ²Ð»ÐµÑÐµÐ½Ð¸Ñ Ð² ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐµ Â«ÐÐ»Ð¾Ð±ÑÑ-Ð2Â», Ð° ÑÐ°ÐºÐ¶Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð½Ð¾Ð²Ð¾Ð¹ MJ-Ð°Ð½ÑÐµÐ½Ð½Ñ, Ð¸Ð·Ð»ÑÑÐ°ÑÑÐµÐ¹ Ð² Ð¿Ð»Ð°Ð·Ð¼Ñ, Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ÐºÐ¾Ð½ÐµÑÐ½Ð¾-ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ½Ð¾Ð³Ð¾ Ð¿Ð°ÐºÐµÑÐ°.Â  Ð ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐµ ÑÑÑÐ°Ð½Ð¾Ð²Ð»ÐµÐ½Ð¾, ÑÑÐ¾ ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ Ð¾ÑÑÐ°Ð¶ÐµÐ½Ð¸Ñ ÑÐ°ÑÑÐµÑ Ð¿ÑÐ¸ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ð¸ ÑÐ°Ñ-ÑÑÐ¾ÑÐ½Ð¸Ñ Ð¼ÐµÐ¶Ð´Ñ Ð°Ð½ÑÐµÐ½Ð½Ð¾Ð¹ Ð¸ ÑÐµÐ¿Ð°ÑÐ°ÑÑÐ¸ÑÐ¾Ð¹, Ð´Ð¾ÑÑÐ¸Ð³Ð°Ñ Ð·Ð½Ð°ÑÐµÐ½Ð¸Ñ 10â20 % Ð¿ÑÐ¸ ÑÐ°ÑÑÑÐ¾ÑÐ½Ð¸Ð¸ Ð¼ÐµÐ½ÐµÐµ 1 ÑÐ¼ Ð¸ 40â60 % Ð¿ÑÐ¸ ÑÐ°ÑÑÑÐ¾ÑÐ½Ð¸Ð¸ Ð±Ð¾Ð»ÐµÐµ 2 ÑÐ¼. Ð COMSOL Multiphysics ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½Ð° Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÐ¾Ð»Ð¾Ð´Ð½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ñ, Ð´Ð»Ñ Ð¿Ð¾Ð³Ð»Ð¾ÑÐµÐ½Ð¸Ñ Ð²Ð¾Ð»Ð½ Ð½Ð° Ð³ÑÐ°Ð½Ð¸ÑÐµ ÑÐ°ÑÑÐµÑÐ½Ð¾Ð¹ Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð°ÑÑ ÑÐµÑÐ½Ð¸ÐºÐ° PML-ÑÐ»Ð¾ÐµÐ². Ð ÑÐ°ÑÑÐµÑÐµ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸ Ð¿ÑÐ¾ÑÑÐ¾Ð¹ Ð´ÐµÑÑÑÐ¸Ð²Ð¾Ð»Ð½Ð¾Ð²Ð¾Ð´Ð½Ð¾Ð¹ Ð°Ð½ÑÐµÐ½Ð½Ñ. Ð ÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°ÑÑÐµÑÐ° ÑÐ¾ÑÐ¾ÑÐ¾ ÑÐ¾Ð³Ð»Ð°ÑÑÑÑÑÑ Ñ ÐºÐ¾Ð´Ð¾Ð¼ Grill3D Ð¸ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸ÑÐ¼Ð¸. Ð Ð°ÑÑÑÐ¸ÑÐ°Ð½ ÑÐ¿ÐµÐºÑÑ Ð²Ð¾Ð»Ð½, Ð¸Ð·Ð»ÑÑÐ°ÐµÐ¼ÑÑ MJ-Ð°Ð½ÑÐµÐ½Ð½Ð¾Ð¹, Ð¸ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÑ ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½ÑÐ° Ð¾ÑÑÐ°Ð¶ÐµÐ½Ð¸Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð¾Ñ Ð¿ÑÐ¾ÑÐ¸Ð»Ñ Ð¿Ð»Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð² Ð¿ÑÐ¸ÑÑÐµÐ½Ð¾ÑÐ½Ð¾Ð¹ Ð¾Ð±Ð»Ð°ÑÑÐ¸. Ð ÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°Ð±Ð¾ÑÑ Ð¼Ð¾Ð³ÑÑ Ð±ÑÑÑ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ñ Ð² ÐÐ°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ¸Ð¸ ÑÐ¸Ð·Ð¸ÐºÐ¸ Ð²ÑÑÐ¾ÐºÐ¾ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ñ Ð¤Ð¢Ð Ð¸Ð¼. Ð.Ð¤. ÐÐ¾ÑÑÐµ Ð ÐÐ Ð¿ÑÐ¸ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐµ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ° Ð¿Ð¾ ÐÐ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ð¸ ÑÐ¾ÐºÐ° Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð½Ð¾Ð²ÑÑ MJ-Ð°Ð½ÑÐµÐ½Ð½ Ð¸ Ð¸Ð½ÑÐµÑÐ¿ÑÐµÑÐ°ÑÐ¸Ð¸ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÑ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð², Ð° ÑÐ°ÐºÐ¶Ðµ Ð´Ð»Ñ ÑÐ°ÑÑÐµÑÐ° MJ-Ð°Ð½ÑÐµÐ½Ð½ ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐ° Ð¢-15ÐÐ.
description: This given work is devoted to the experimental study of the dependence of the reflection coefficient of HF power on plasma parameters during LHCD experiments in the Globus-M2 tokamak, as well as the calculation of the characteristics of a new MJ antenna emitting into plasma using a finite element package. It was found experimentally that the reflection coefficient increases with increasing distance between the antenna and the separatrix, reaching a value of 10-20% at a distance of less than 1 cm and 40-60% at a distance of more than 2 cm. In COMSOL Multiphysics a cold plasma model is implemented, the PML technique was used to absorb waves at the boundary of the computational domain. The calculation obtained the characteristics of a simple ten-waveguide antenna. The calculation results are in good agreement with the Grill3D code and measurements. The spectrum of waves emitted by the MJ antenna and the dependence of the power reflection coefficient on the density profile in the wall region are calculated. The results of this work can be applied in the High-temperature Plasma Physics Laboratory of the Ioffe Institute in the preparation of an experiment on LHCD using new MJ antennas and interpretation of experimental results, as well as for numerical modeling of the MJ antennas of the tokamak T-15MD.