title: Ð¡ÑÑÑÐºÑÑÑÐ° Ð³ÑÐ°Ð½Ð¸ÑÑ Ð¿Ð»Ð°Ð·Ð¼Ð°-ÑÐ»Ð¾Ð¹ Ð² ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐ°Ñ ÑÐµÐ°ÐºÑÐ¾ÑÐ°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 structure of the plasma-sheath boundary in tokamak reactors
Creators: name: ÐÐ°ÑÐ°Ð½Ð¾Ð²ÑÐºÐ¸Ð¹, ÐÐ»ÑÑ
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Ð»Ð°Ð·Ð¼Ð° (ÑÐ¸Ð·.)
Ð¯Ð´ÐµÑÐ½ÑÐµ ÑÐµÐ°ÐºÑÐ¾ÑÑ
ÑÐ¾ÐºÐ°Ð¼Ð°Ðº
Ð²ÑÑÐ¾ÐºÐ°Ñ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²Ð¸ÑÐµÐ»ÑÐ½Ð¾ÑÑÑ
ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð¿ÑÐµÐ´ÑÐ»Ð¾Ð¹
tokamak
high collision
collisional presheath

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð°Ð½Ð°Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¾Ð¼Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ¸ ÑÐ¸Ð»ÑÐ½Ð¾ Ð¸Ð¾Ð½Ð¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ñ Ñ Ð¸Ð¾Ð½Ð°Ð¼Ð¸, Ð½Ðµ Ð·Ð°Ð¼Ð°Ð³Ð½Ð¸ÑÐµÐ½Ð½ÑÐ¼Ð¸ Ð¾ÑÐ½Ð¾ÑÐ¸ÑÐµÐ»ÑÐ½Ð¾ Ð¸Ð¾Ð½-Ð¸Ð¾Ð½Ð½ÑÑ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¹. Ð ÑÐ°Ð±Ð¾ÑÐµ ÑÐµÑÐ°ÐµÑÑÑ ÑÑÐ´ Ð°Ð½Ð°Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¼Ð¾Ð´ÐµÐ»ÑÐ½ÑÑ Ð·Ð°Ð´Ð°Ñ Ð¾ ÑÐµÑÐµÐ½Ð¸Ð¸ Ð¿Ð»Ð°Ð·Ð¼Ñ Ð²Ð±Ð»Ð¸Ð·Ð¸ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾Ð¹ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÐ¸ Ñ Ð¿Ð¾ÑÐ»ÐµÐ´ÑÑÑÐ¸Ð¼ Ð°Ð½Ð°Ð»Ð¸Ð·Ð¾Ð¼ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð². Ð ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ ÑÐ¾ÑÐ¼Ð¸ÑÑÐµÑÑÑ Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÐµÑÐµÐ½Ð¸Ñ Ð¿Ð»Ð°Ð·Ð¼Ñ. ÐÐ¸Ð½Ð°Ð¼Ð¸ÐºÐ° Ð¿ÑÐ¾Ð´Ð¾Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ Ð¾ÑÑÐ°ÐµÑÑÑ Ð¿Ð¾ÑÑÐ¸ ÑÐ°ÐºÐ¾Ð¹ Ð¶Ðµ, ÐºÐ°Ðº Ð¸ Ð² Ð¿Ð¾Ð»Ð½Ð¾ÑÑÑÑ Ð·Ð°Ð¼Ð°Ð³Ð½Ð¸ÑÐµÐ½Ð½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ðµ. ÐÐ±Ð»Ð¸Ð·Ð¸ ÑÑÐµÐ½ÐºÐ¸ Ð¿ÑÐ¾Ð´Ð¾Ð»ÑÐ½Ð¾Ðµ Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ðµ Ð¿ÐµÑÐµÑÐ¾Ð´Ð¸Ñ Ð² ÐºÐ»Ð°ÑÑÐ¸ÑÐµÑÐºÑÑ Ð´Ð¸ÑÑÑÐ·Ð¸Ñ Ð¿Ð¾Ð¿ÐµÑÐµÐº Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ñ, Ð²Ð¾Ð·Ð½Ð¸ÐºÐ°ÑÑÑÑ Ð² ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ ÑÐ»ÐµÐºÑÑÐ¾Ð½-Ð¸Ð¾Ð½Ð½ÑÑ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¹. ÐÐ° ÑÐ°ÑÑÑÐ¾ÑÐ½Ð¸Ð¸ Ð½ÐµÑÐºÐ¾Ð»ÑÐºÐ¸Ñ ÑÐ¸ÐºÐ»Ð¾ÑÑÐ¾Ð½Ð½ÑÑ ÑÐ°Ð´Ð¸ÑÑÐ¾Ð² Ð¾Ñ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÐ¸ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð° Ð¼Ð¾Ð¶ÐµÑ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÑÑÑ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½ÑÐ¹ Ð¿ÑÐµÐ´ÑÐ»Ð¾Ð¹, Ð² ÐºÐ¾ÑÐ¾ÑÐ¾Ð¼ Ð¸Ð¾Ð½Ñ Ð´Ð²Ð¸Ð¶ÑÑÑÑ Ðº Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾Ð¹ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÐ¸ ÑÐ¾ ÑÐºÐ¾ÑÐ¾ÑÑÑÑ Ð¿Ð¾ÑÑÐ´ÐºÐ° ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð·Ð²ÑÐºÐ° Ð½ÐµÑÐ¼Ð¾ÑÑÑ Ð½Ð° ÑÐ¾, ÑÑÐ¾ Ð¸ÑÐ¿ÑÑÑÐ²Ð°ÑÑ Ð¼Ð½Ð¾Ð³Ð¾ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¹, Ð¿ÑÐµÐ¶Ð´Ðµ ÑÐµÐ¼ Ð´Ð¾ÑÑÐ¸ÑÑ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÐ¸.
description: This work is devoted to an analytical study of the dynamics of a strongly ion-ized plasma with ions that are un-magnetized with respect to ion-ion collisions. In the work, several analytical model problems on the plasma flow near a material sur-face are solved with subsequent analysis of the results. As a result, a plasma flow model is formed. The parallel motion dynamics remains almost the same as in a full magnetized plasma. Near the wall, the parallel motion turns into classical diffusion across the magnetic field, which occurs because of electron-ion collisions. At a scale of several gyroradii from the material surface a collisional magnetic presheath can be formed, where ions move towards the material surface at a speed of the order of the sound speed, despite the fact that they exhibit many collisions before reach-ing the surface.