title: Ð¨ÑÐ¼Ð¾Ð²ÑÐµ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸ Ð¿ÑÐ¸ÐµÐ¼Ð½Ð¾-ÑÑÐ¸Ð»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ ÑÐ°Ð´Ð¸Ð¾ÑÐµÐ»ÐµÑÐºÐ¾Ð¿Ð° Ð¿ÑÐ¸ ÐºÑÐ¸Ð¾Ð³ÐµÐ½Ð½ÑÑ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ°Ñ
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: Noise characteristics of the receiving and amplifying system of a radio telescope at cryogenic temperatures
Creators: name: Ð¥Ð°Ð»ÐµÐµÐ½ÐºÐ¾Ð²Ð°, ÐÐ»Ð¸Ð·Ð°Ð²ÐµÑ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
ÑÐ°Ð´Ð¸Ð¾ÑÐµÐ»ÐµÑÐºÐ¾Ð¿
ÑÑÐ¼Ð¾Ð²ÑÐµ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸
Ð¿ÑÐ¸ÑÐ¼Ð½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð°
ÐºÑÐ¸Ð¾Ð³ÐµÐ½Ð½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð°
VLBI
radio telescope
noise characteristics
receiving system
cryogenic system

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description: The work is devoted to the theoretical and experimental analysis of the noise characteristics of the receiving and amplifying system of a radio telescope at cryogenic temperatures achieved using a compact Stirling cooler. The developed cooling system made it possible to reach a temperature of 148 K in 1 hour 10 minutes. The work provides descriptions of measurement techniques and results of measuring the noise characteristics of the receiving unit and its individual elements at cryogenic temperatures. To measure the noise characteristics, the two-sample method (Y-factor method) was used. The noise temperature of the receiving unit, cooled to a temperature of 150 K, during measurements ranged from 170 K to 350 K in the operating frequency range from 3 GHz to 16 GHz. The measurement data are in satisfactory agreement with the results of theoretical calculations. Open educational resources and programs for searching and analyzing information were used. Automation (computer-aided) development tools were used. The software DipTrace, AtmelStudio, KOMPAS-3D, MATLAB was used (tested). The results of the final qualifying work were used as part of the research work of the institute âCreation of a prototype of a mobile VLBI station of the Quasar VLBI network.â