title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ½ÐµÑÐ³ÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº Ð¿Ð»Ð°Ð·Ð¼Ñ ÑÐ¾ÐºÐ°Ð¼Ð°ÐºÐ° Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð±ÑÑÑÑÐ¾Ð´ÐµÐ¹ÑÑÐ²ÑÑÑÐ¸Ñ ÑÐ¾ÑÐ¾Ð´Ð¸Ð¾Ð´Ð¾Ð²
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: Study of the energy characteristics of tokamak plasma using high-speed photodiodes
Creators: name: Ð¢ÐºÐ°ÑÐµÐ½ÐºÐ¾, ÐÐ°Ð½Ð¸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: 2024
Subjects: ÐÐ»Ð°Ð·Ð¼Ð° (ÑÐ¸Ð·.)
Ð ÐµÐ½ÑÐ³ÐµÐ½Ð¾Ð²ÑÐºÐ¸Ðµ Ð»ÑÑÐ¸
ÑÐ¾ÑÐ¼Ð¾Ð·Ð½Ð¾Ðµ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ðµ
ÑÐ¾ÑÐ¾Ð¿ÑÐ¸ÐµÐ¼Ð½Ð¸ÐºÐ¸
ÑÑÑÐµÐºÑÐ¸Ð²Ð½ÑÐ¹ Ð·Ð°ÑÑÐ´ Ð¿Ð»Ð°Ð·Ð¼Ñ
bremsstrahlung radiation
photodetectors
effective plasma charge

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description: This work involves the use of high-speed (from 300 kHz and above) and highly sensitive (with gain from 10^5 V/A and above) photodiodes to collect radiation from the tokamak plasma and subsequent analysis of the energy parameters of the plasma. Depending on the diagnostics used in conjunction with photodiodes, it is possible to determine various plasma parameters, such as: soft/hard/- x-ray radiation, electron temperature, density, effective charge, high-energy particles in counting mode, etc.; including spatial resolution. This paper presents a method for determining the effective plasma charge . To do this, it is proposed to collect bremsstrahlung radiation in a small spatial region due to the predominance of its mechanism over others in the hydrogen, deuterium or helium plasma of a tokamak at an electron temperature of more than 100 eV and a density of the order of 10^13 cm^â3 . Especially for this purpose, a diagnostic complex consisting of one photodiode was manufactured and installed on the TUMAN-3M tokamak. To exclude low-energy photons and particles, beryllium foil was installed in front of the detector. Diagnostics has such properties as small dimensions, ease of use, low price, as well as passivity, i.e. lack of interference during the process being studied.