Recently, the United States, "Laser Interferometric Gravity Wave Observatory (LIGO)" the first direct detection of gravitational waves, gravitational waves of the professional term began to enter the public field of vision, causing concern. Sun Yat-sen University on the 21st held to promote the implementation of "Tianqin Program" seminar, the reporter was informed that the current plan is progressing well, some of the infrastructure has been started.
It is reported that "Tianqin Project" specifically by the Sun Yat-sen University, Chinese Academy of Sciences Professor Luo Jun team led. In January 2015, before taking over the principal of Zhongda, Luo Jun had been engaged in physics research at Huazhong University of Science and Technology. His gravitational laboratory was also called "the gravity center of the world" by foreign experts and completed the " Some key technology reserves. For example, the interstellar laser ranging technology, that is, the laser interferometry between two stars accurately measure the distance, but also accumulated more than 10 years of inertial sensor technology, was carried in 2006 satellite test, the second satellite in 2013 Carry.
It is reported that the starting point for the program is actually based on China's technological capabilities and the actual development of the future prospects for the next few decades, put forward our own initiative to carry out space exploration of the feasibility of the program. According to the plan, the antennae will use three identical satellites to form an equilateral triangle array, each of which contains one or two extremely carefully suspended test masses. The three satellite array in space similar to the instrument harp, it is named "Lyra plan." The satellite will install a micro-cow thruster with finely adjusted thrust force to adjust the attitude of the satellite in real time, so that the quality of inspection is always kept in contact with the surrounding protective containers. The quality of the test will then only be induced by gravity, and subtle, non-gravitational disturbances such as solar wind or solar pressure will be shielded by the satellite shell. High-precision inter-satellite laser interferometry ranging technology will be used to record the gravitational waves caused by different waves, the quality of subtle changes in the distance between the satellite to obtain information on the gravitational waves. Unlike LISA or eLISA, the Lycosoft satellites will operate on a geocentric orbital altitude of about 100,000 kilometers, detecting a defined source of gravitational waves. Such an option avoids the issue of determining the source of the gravitational waves by measuring the signal of the gravitational waves and is expected to help save the cost of a large number of satellite launches. The experimental technique of Lycium will be further optimized in future research.
Luo Jun introduced the overall plan, the program is expected to execute the Tianqin 2016-2035, implemented in four phases: 2016-2020: Completion of the lunar / deep space satellite laser ranging, space equivalent principle test experiment and the next generation of gravity Satellite experiment required for the development of key technologies. The main research and development achievements include: a new generation of lunar laser rangefinder, lunar laser ranging station, high-precision accelerometer, drag-free control (including micro thrusters), high precision satellite laser interferometer, Etc .; 2021-2025: Completion of the space equivalent principle test experiment and next-generation prototype experimental satellite project, and the successful launch of the next generation of gravity satellites and space equivalent principle experimental satellite. The main research and development achievements include: ultra-quiet satellite platform, high-precision large-scale laser gyroscope, and technologies such as accelerometer, dragless control (including micro thrusters), high precision satellite laser interferometer and intersatellite laser ranging; - 2030: Completion of space gravitational wave detection of key technologies to complete the satellite payload engineering prototype; 2031-2035: joint commissioning of satellite systems, system assembly, launching of space gravitational wave detection satellites.
It is reported that the development of "Tianqin Project" will build the comprehensive research facility of Tianqin Project in Zhuhai Campus of Sun Yat-sen University and will guide the development of key technologies of gravitational experiments. In the fields of gravitation theory and experiment analysis, satellite platform and control, optical surveying and remote sensing, Earth-moon system physics experiment four aspects of system research, nurturing large research team.
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