title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ð¹ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ Ð½Ð° ÑÑÐµÑÐ¸ÑÐµÑÐºÐ¾Ð¼ ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐµ ÐÐ»Ð¾Ð±ÑÑ-Ð2 Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ Ð´Ð¾Ð¿Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐµÑÐ½Ð¸Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: The investigation of plasma turbulence on the spherical tokamak Globus-M2 using Doppler backscattering
Creators: name: ÐÐ¾Ð½Ð¾Ð¼Ð°ÑÐµÐ½ÐºÐ¾, ÐÐ½Ð½Ð°
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: Ð£ÑÐºÐ¾ÑÐ¸ÑÐµÐ»Ð¸ Ð·Ð°ÑÑÐ¶ÐµÐ½Ð½ÑÑ ÑÐ°ÑÑÐ¸Ñ
Ð¢ÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾Ðµ ÑÐµÑÐµÐ½Ð¸Ðµ
ÑÐ¾ÐºÐ°Ð¼Ð°Ðº
ÑÐ¸Ñ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸
Ð´Ð¾Ð¿Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ðµ Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ðµ ÑÐ°ÑÑÐµÑÐ½Ð¸Ðµ
tokamak
velocity shear
Doppler backscattering

description: Ð¢ÐµÐ¼Ð° Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ: Â«ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ð¹ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ Ð½Ð° ÑÑÐµÑÐ¸ÑÐµÑÐºÐ¾Ð¼ ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐµ ÐÐ»Ð¾Ð±ÑÑ-Ð2 Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ Ð´Ð¾Ð¿Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐµÑÐ½Ð¸ÑÂ». Ð¦ÐµÐ»ÑÑ ÐÐÐ  ÑÐ²Ð»ÑÐµÑÑÑ ÑÐµÐ³Ð¸ÑÑÑÐ°ÑÐ¸Ñ Ð¿Ð¾Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿ÐµÑÐ¸ÑÐµÑÐ¸Ð¹Ð½Ð¾Ð¹ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ¸ Ð¿ÐµÑÐµÑÐ¾Ð´Ðµ Ð² ÑÐµÐ¶Ð¸Ð¼ ÑÐ»ÑÑÑÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ´ÐµÑÐ¶Ð°Ð½Ð¸Ñ Ð½Ð° ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐµ ÐÐ»Ð¾Ð±ÑÑ-Ð2. ÐÐ»Ñ ÑÑÐ¾Ð³Ð¾ Ð±ÑÐ» ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½ Ð¼Ð½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐ¾ÑÐ½ÑÐ¹ Ð¼ÐµÑÐ¾Ð´ Ð´Ð¾Ð¿Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐµÑÐ½Ð¸Ñ, Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÑÑÐ¸Ð¹ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÑ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ñ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ñ ÑÐ°Ð´Ð¸ÑÑÐ°Ð¼Ð¸ Ï = 0,5-1,1. Ð ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ ÐÐÐ  Ð±ÑÐ»Ð° Ð¿ÑÐ¾Ð´ÐµÐ¼Ð¾Ð½ÑÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð° Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑ Ð¸Ð·ÑÑÐµÐ½Ð¸Ñ LH Ð¿ÐµÑÐµÑÐ¾Ð´Ð° Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð´Ð¸Ð°Ð³Ð½Ð¾ÑÑÐ¸ÐºÐ¸ ÐÐÐ  Ð¸ Ð±ÑÐ»Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ Ð½Ð¾Ð²ÑÐµ ÑÐ²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¾ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ð¹ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐ° ÐÐ»Ð¾Ð±ÑÑ-Ð2. ÐÑÐ»Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ Ð¿ÑÐ¾ÑÐ¸Ð»Ð¸ ÑÐ»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¿Ð¾Ð»Ñ Ð¸ Ð¿Ð¾Ð»Ð¾Ð¸Ð´Ð°Ð»ÑÐ½Ð¾Ð¹ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð²ÑÐ°ÑÐµÐ½Ð¸Ñ Ð² L-Ð¼Ð¾Ð´Ðµ Ð¸ Ð-Ð¼Ð¾Ð´Ðµ. ÐÐ½Ð¾Ð³Ð¾ÑÐ°ÑÑÐ¾ÑÐ½ÑÐ¹ Ð¼ÐµÑÐ¾Ð´ ÐÐÐ  Ð¿Ð¾Ð·Ð²Ð¾Ð»Ð¸Ð» Ð¿Ð¾Ð»ÑÑÐ¸ÑÑ Ð·Ð½Ð°ÑÐµÐ½Ð¸Ðµ ÑÐ¸ÑÐ° ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð¿Ð¾ÑÑÐ´ÐºÐ° 3 Ã 10^5 Ñ^-1 Ð½ÐµÐ¿Ð¾ÑÑÐµÐ´ÑÑÐ²ÐµÐ½Ð½Ð¾ Ð¿ÐµÑÐµÐ´ Ð¿ÐµÑÐµÑÐ¾Ð´Ð¾Ð¼ Ð² Ð-ÑÐµÐ¶Ð¸Ð¼. ÐÑÐ¾Ð¼Ðµ ÑÐ¾Ð³Ð¾, Ð½Ð°Ð±Ð»ÑÐ´Ð°Ð»Ð¾ÑÑ Ð¿Ð¾Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½ÑÑ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐµÐ¹ Ð¿ÑÐ¸ LH Ð¿ÐµÑÐµÑÐ¾Ð´Ðµ Ð½Ð° Ð¿ÐµÑÐ¸ÑÐµÑÐ¸Ð¸. Ð¢Ð°ÐºÐ¶Ðµ Ð±ÑÐ»Ð¾ Ð²ÑÑÐ²Ð»ÐµÐ½Ð¾, ÑÑÐ¾ ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¾Ð½Ð½Ð°Ñ Ð´Ð»Ð¸Ð½Ð° ÑÐ¼ÐµÐ½ÑÑÐ°ÐµÑÑÑ Ð² 1,5 ÑÐ°Ð·Ð° Ð¿Ð¾ÑÐ»Ðµ Ð¿ÐµÑÐµÑÐ¾Ð´Ð° Ð² Ð-Ð¼Ð¾Ð´Ñ. Ð­ÑÐ¾ Ð¾Ð·Ð½Ð°ÑÐ°ÐµÑ, ÑÑÐ¾ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ðµ ÑÐ¸ÑÐ° ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð¸ ÑÐ¼ÐµÐ½ÑÑÐµÐ½Ð¸Ðµ ÑÑÐ¾Ð²Ð½Ñ Ð¿ÐµÑÐ¸ÑÐµÑÐ¸Ð¹Ð½Ð¾Ð¹ Ð¸ ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ Ð´Ð»Ð¸Ð½Ñ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ Ð² Ð-Ð¼Ð¾Ð´Ðµ ÑÐ²ÑÐ·Ð°Ð½Ð½ÑÐµ ÑÐ²Ð»ÐµÐ½Ð¸Ñ. ÐÑÐ»Ð¾ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¾, ÑÑÐ¾ ÑÐºÐ¾ÑÐ¾ÑÑÑ Ð²ÑÐ°ÑÐµÐ½Ð¸Ñ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ð¹ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ ÑÐµÐ°Ð³Ð¸ÑÑÐµÑ Ð½Ð° ELM Ð² Ð¿ÐµÑÐ¸ÑÐµÑÐ¸Ð¹Ð½Ð¾Ð¹ Ð¸ Ð²Ð½ÑÑÑÐµÐ½Ð½ÐµÐ¹ Ð¾Ð±Ð»Ð°ÑÑÑÑ Ð¿Ð»Ð°Ð·Ð¼Ñ. ÐÑÐ»Ð¾ Ð¿Ð¾Ð´ÑÑÐ¸ÑÐ°Ð½Ð¾, ÑÑÐ¾ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½ÑÐµ ÑÐ»ÑÐºÑÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°Ð³Ð¸ÑÑÑÑ Ð½Ð° ELM Ð½Ð° ÑÐ°ÑÑÑÐ¾ÑÐ½Ð¸Ð¸ 6 ÑÐ¼ Ð²Ð½ÑÑÑÐ¸ ÑÐµÐ¿Ð°ÑÐ°ÑÑÐ¸ÑÑ. Ð¢Ð°ÐºÐ¶Ðµ Ð±ÑÐ»Ð¾ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ ÑÐ°Ð´Ð¸Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ ELM Ð¾Ñ Ð²Ð½ÑÑÑÐµÐ½Ð½ÐµÐ¹ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½Ð¾Ð¹ Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ðº Ð¿ÐµÑÐ¸ÑÐµÑÐ¸Ð¸ ÑÐ¾ ÑÐºÐ¾ÑÐ¾ÑÑÑÑ Ð¾ÐºÐ¾Ð»Ð¾ 8 ÐºÐ¼/Ñ.
description: The topic of the thesis is âThe investigation of plasma turbulence on the spherical tokamak Globus-M2 using Doppler backscatteringâ. The aim of this work is to detect the suppression of peripheral plasma turbulence during the transition to H-mode on the Globus-M2 tokamak. To achieve this, multi-frequency Doppler backscattering was implemented, allowing measurements in an area with radii Ï = 0,5-1,1. As a result, the work demonstrated the possibility of studying the LH transition by means of the DBS diagnostics and new information about plasma turbulence of the Globus-M2 tokamak was obtained. Profiles of the electric field and poloidal rotation velocity in L-mode and H-mode were measured. The multi-frequency DBS method allowed to calculate the velocity shear with values of about 3 Ã 10^5 s^-1 just before transition to H-mode. In addition, plasma turbulence suppression was observed during the LH transition in the plasma edge. It was also shown that the turbulence correlation length decreases by 1,5 after transition to H-mode. This means that the increasing velocity shear and decreasing level of peripheral turbulence and correlation length in H-mode are related phenomena. It was found that the rotation velocity of plasma turbulence reacts to ELM in the peripheral and inner plasma regions. It has been estimated that plasma fluctuations react to ELMs at a distance of 6 cm inside the separatrix. The direction of the radial movement of the ELMs was analyzed to be from the inner plasma region to the periphery with a velocity of 8 km/s.