Dialectics has said that movement is eternal, and static is relative. The movement and stillness in scientific research experiments are also very interesting. On the evening of February 11, 2016, the American Laser Interference Gravitational Wave Observatory-LIGO announced and confirmed the existence of gravitational waves by observing the collision fusion process of two black holes. This discovery fills the last piece of the missing puzzle in the general relativity experiment, and its significance is also conceivable.
Figure 1 American Laser Interference Gravitational Wave Observatory - LIGO
What is gravitational wave? Modern physics believes that gravitational waves are radiations that are different from electromagnetic waves and cannot be directly observed by electromagnetic radiation. The interaction between gravitational waves and matter in the universe is very weak, so it can spread to far-reaching space. Gravitational waves are a kind of time and space, just like the ripples that stones are thrown into the water. Celestial bodies such as black holes and neutron stars may generate gravitational waves during collisions.
Simply put, if the naked eye and the optical telescope are compared to "seeing", then the radio telescope is like "listening", and the gravitational wave is "perception." Through the fluctuations of the ripples, the information of the core vortex is reversed. Gravitational wave detection is an improvement in the level of "opening the world", so that we finally have the ability to detect the most primitive "darkness" of the universe.
Since 1916, Einstein predicted the existence of gravitational waves based on general relativity. In the past 100 years, people have tried to verify them experimentally. The two most difficult parts of the experiment are the accuracy of the length measurement and the interference of external vibration. Only the relatively "stationary" near the ideal state between the experimental devices can detect the most "moving" in the universe.
After a long period of careful design, in 2016, people successfully used the long-distance laser Michelson interference principle to amplify the length variation caused by gravitational waves to within the measurement accuracy. In terms of avoiding external vibration interference, people have successfully used the suspension plus electromagnetic damping technology to reduce the relative vibration of the experimental device separated by kilometers to a near-ideal "stationary" state. It is the continuous improvement of experimental technology that allows scientists to complete another feat of human exploration in the universe.
Figure 2 Montana's new ultra-high damping HILA system (with suspension plus electromagnetic damping technology in the middle)
At present, this damping technology has been applied to relatively small experimental devices. Montana's latest ultra-high-damping cryo-optical thermostat HILA system uses suspension and electromagnetic damping damping technology to successfully reduce the vibration acceleration to <1 μg/√Hz (1-100 Hz). In addition to avoiding the vibration of the refrigerator, it also provides a good isolation for the weak vibration of the outside world. At present, the system is about to complete all performance tests, and then officially target users of various experimental platforms around the world.
As the only partner of Montana in China, Quantum Design China officially recommended this high-performance thermostat to researchers in the global cryogenic field. We look forward to your research progress under the help of Montana's ultra-high damping low temperature optical constant temperature equipment, and you will get more fruitful research results in the new year!
Entrance Cupboard,Entrance Storage Cabinet,Entrance Hall Cabinet,Front Entrance Cabinet
Foshan Qiaotai Furniture Products Co., Ltd. , https://www.qiaotaifurniture.com