title: ÐÐ¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð² Ð»Ð¸ÑÐ¸ÐµÐ²Ð¾Ð³Ð¾ Ð´Ð¸Ð²ÐµÑÑÐ¾ÑÐ° Ð´Ð»Ñ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ ÐÐÐÐ-Ð¢ÐÐ
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: Modeling of lithium divertor elements for DEMO-FNS installation
Creators: name: Ð¯Ð»ÑÐ½ÑÐºÐ°Ñ, ÐÐ°Ð´ÐµÐ¶Ð´Ð°
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: 2020
Subjects: ÑÐ¸Ð·Ð¸ÐºÐ° Ð¿Ð»Ð°Ð·Ð¼Ñ
ÑÐµÑÐ¼Ð¾ÑÐ´ÐµÑÐ½ÑÐ¹ ÑÐ¸Ð½ÑÐµÐ·
ÑÐ¾ÐºÐ°Ð¼Ð°Ðº
ÐÐÐÐ-Ð¢ÐÐ
Ð³Ð¸Ð±ÑÐ¸Ð´Ð½ÑÐ¹ ÑÐµÐ°ÐºÑÐ¾Ñ
Ð»Ð¸ÑÐ¸Ð¹
ÑÐ¾Ð¿Ð»Ð¾ Ð»Ð°Ð²Ð°Ð»Ñ
ÑÐµÑÐ¼Ð¾ÑÐ´ÐµÑÐ½ÑÐ¹ Ð¸ÑÑÐ¾ÑÐ½Ð¸Ðº Ð½ÐµÐ¹ÑÑÐ¾Ð½Ð¾Ð²
Ð´Ð¸Ð²ÐµÑÑÐ¾Ñ
plasma physics
thermonuclear fusion
tokamak
DEMO-FNS
hybrid reactor
lithium
laval nozzle
thermonuclear source of neutrons
divertor

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description: The given work is devoted to the modeling of the counterflow system in the lithium evaporative divertor of the DEMO-FNS tokamak. We considered a divertor design consisting of three series-connected chambers filled with lithium vapor, on which the power coming from the plasma was applied. The aim of the work was to develop methods for reducing the flow of lithium from the divertor into the main plasma volume of the tokamak. The idea was to implement an additional directional counterflow, which, due to dynamic pressure, suppresses the escape of plasma-vaporized lithium from a hotter chamber to a colder one. For this, a lithium source equipped with a nozzle was placed in one of the chambers. 
The results of calculating the parameters of the vapor source and the counterflow of lithium produced by the source both for a simple slotted nozzle at the exit of the source and for the Laval nozzle are presented. Two options for the source location are considered. The estimates obtained confirmed the possibility of suppressing the flow of lithium from the divertor evaporation chamber, made it possible to select technically feasible parameters of the source and nozzle, as well as the best option for its location. The results can be applied on tokamaks equipped with an evaporative lithium diverter.