Da Wan News According to the website of China University of Science and Technology, a space plasma scientific detection payload development team composed of Associate Professor Shan Xu of the School of Physics, a space plasma scientific detection payload development team composed of the School of Earth and Space Science and the School of Physics, and joined forces with the Institute of 513 of the Fifth Academy of Aerospace and other units to successfully develop the Beidou-3 satellite low-energy ion detection payload (LEIS). The paper on the development of loads was accepted and published by OpenAstronomy journal, and the first on-orbit observation results were published online in the journal SCIENCE CHINA Technical Sciences.
space low energy ions are the basic elements of space plasma detection. The in-situ detection data of satellite payload can not only be used to study solar activities and its role in interplanetary space and planetary magnetic fields, magnetosphere structure and its dynamics, magnetic field reconnection and ring current phenomena, but also can warn of extreme space weather events to provide guarantees for the safe operation of satellites or spacecraft. Therefore, most detection satellite carry space plasma detection payloads. Compared with the internationally advanced low-energy particle loads, my country's similar loads are relatively backward, and there are few first-hand benchmark data, and relevant scientific and applied research are limited. Under the initiative of Academician Wang Shui and Academician Dou Xiankang, in 2012, the Wang Yuming team of the School of Earth and Space, the Chen Xiangjun team of the School of Physics and An Qi/ Liu Shubin team jointly formed the space low-energy particle payload development team of the University of Science and Technology of China. Associate Professor Shan Xu was appointed as the chief designer of the payload, leading the team to carry out key technical research and development. In 2014, the team completed the principle prototype and performance calibration of the space low-energy ion spectrometer, and successfully passed the expert group review in February 2015. In March 2016, the team undertook the task of practicing the No. 18 satellite payload development. Thanks to the preliminary technical research, the development of principle prototypes, appraisal parts and flight parts aerospace products was completed within one year, and was delivered to the satellite in February 2017 and launched in July. The paper on the development of loads was published in the journal SCIENCE CHINA Technical Sciences (2019, 62: 1015-1027) under the title "A low-energy ion spectrometer with half-space entrance for three-axis stable spacecraft". The reviewer evaluated that "It is very encouragement to see the compact and capable ion spectrometer developed by a Chinese University. After comparing the parameters of their instrument with similar ones, this LIES shows higher capability than other spectrometers."
Figure 1. Satellite launch and in orbit: The left picture is the satellite launch map on June 23, 2020 (from CCTV News ); the right picture is the schematic diagram of satellite payload in orbit.
Figure 2. On-orbit observation results: The left figure shows the energy differential flux of spatial ions with energy and time; the right figure shows the quantitative data on the energy differential flux of spatial ions with energy changes.
In 2018, the team was responsible for the development of low-energy ion loads of the Beidou-3 satellite plasma detection package. Based on the previous load, it further expanded the ion energy detection range; improved the energy and angle resolution; and reduced the load power consumption, size and weight. The payload flight parts product was delivered in November 2019 and the satellite was successfully launched in June 2020 (see Figure 1). The first start-up test was normal on August 27, 2020, and scientific data measurement officially began on September 23, 2021. Figure 2 is the first in-orbit measurement. From the left figure, the typical characteristics of ion flux changes caused by magnetic storm /substorm, as well as ion aggregation caused by satellite surface charging. The figure on the right shows quantitative data on ion differential flux, which is consistent with the Van Allan detection results of NASA in the United States, and the data quality reaches the international advanced level. Related research results were recently published online in the Chinese Journal of Science-Technology Science. Reviewers evaluated "The results are quite interesting, and the acquired scientific data is important in studying the magnetic ion dynamics as well as monitoring space environment." (The results are very attractive, and the obtained scientific data is important for studying magnetospheric ion dynamics and monitoring the space environment).The successful development of the low-energy ion payload of the Beidou-3 satellite marks the increasingly mature construction of the low-energy particle payload development team and platform for the University of Science and Technology of China, and has the ability to undertake the tasks of the relevant national space detection plan.
Associate Professor Shan Xu of the University of Science and Technology of China is the first author of the above paper and the corresponding author of , Associate Researcher Miao Bin is the co-first author of the first on-orbit observation achievement paper, and Professor Wang Yuming is the project leader and the co-corresponding author of the paper. This work has been funded and supported by Hankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankankank
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