title: ÐÐ¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ·ÐºÐ¾Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð³ÐµÐ»Ð¸ÐµÐ²Ð¾Ð¹ ÑÑÑÑÐ¸ Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ ÐÐ¾Ð½ÑÐµ-ÐÐ°ÑÐ»Ð¾ Ð´Ð»Ñ Ð´Ð¸Ð°Ð³Ð½Ð¾ÑÑÐ¸ÐºÐ¸ Ð¿ÐµÑÐ¸ÑÐµÑÐ¸Ð¹Ð½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ñ ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐ°
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: Simulation of a narrowly directed helium jet source using the Monte Carlo method for diagnosing the peripheral plasma of a tokamak
Creators: name: ÐÑÑÑÐ´Ð¸Ð½Ð¾Ð²Ð°, ÐÐ¸Ð½Ð°Ñ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: 2024
Subjects: Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ ÐÐ¾Ð½ÑÐµ-ÐÐ°ÑÐ»Ð¾
Ð¸Ð½Ð¶ÐµÐºÑÐ¸Ñ Ð³Ð°Ð·Ð¾Ð²Ð¾Ð¹ ÑÑÑÑÐ¸
Ð³Ð°Ð·Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ°
Ð´Ð¸Ð°Ð³Ð½Ð¾ÑÑÐ¸ÐºÐ° Ð¿ÑÐ¸ÑÑÐµÐ½Ð¾ÑÐ½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ñ
ÐÐ»Ð¾Ð±ÑÑ Ð-2
Monte Carlo simulation
gas injection
gas dynamics
diagnostics of wall plasma
Globus M-2

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description: This work is devoted to modeling the outflow of helium into a vacuum using the Monte Carlo method for diagnosing the parameters of peripheral plasma using helium spectroscopy methods. The goal of the work is to find the density and flux profiles of helium when passing through a system of diaphragms that form the jet. Estimates of the Knudsen number showed that when helium flows into the vacuum chamber of a tokamak, a gas-dynamic expansion mode is realized, so the Monte Carlo method was chosen to simulate gas dynamics. A code was developed that made it possible to calculate the movement of gas in accordance with an algorithm for simulating the movement of particles in a two-dimensional computational domain, corresponding to the geometry of the jet source and vacuum chamber. This made it possible to obtain jet density profiles and flux values for different source geometries. For diagnostic purposes, a small jet spread (&lt;200) with a sufficiently large flow (2,2e19 at/s) is required. Taking these requirements into account, the optimal source geometry was selected. Also, based on the results obtained, a 3D model of the source was designed. The source should be a 1 mm diameter nozzle with two 1 mm diameter diaphragms located at a distance of 20 mm from each other.