NdFeB permanent magnets are alloys of neodymium and iron oxide, also known as magnets. As a new result of the development of rare-earth permanent magnet materials, they are called "powerful magnets" because of their relatively good magnetic properties. NdFeB permanent magnets have high magnetic energy product and coercive force, and the advantages of high energy density make NdFeB permanent magnets widely used in modern industry and electronic technology, which makes it possible to miniaturize, lighten, and thin equipment, such as instruments and meters, electro-acoustic motors, and magnetic separation and magnetization.
NdFeB permanent magnetic material antimatter
The existence of antimatter in the universe is a major scientific proposition. According to the currently accepted Big Bang theory, the universe was formed by the Big Bang about 150 years ago, and the Big Bang should have produced equal amounts of matter and antimatter; it is matter that makes up our surroundings, but where is the antimatter?
Another puzzle in astrophysics and cosmology today is the search for dark matter. Astronomy calls the matter in the universe that is optically invisible as dark matter and is characterized by the fact that it neither emits nor interacts with light, and exists only in the form of gravity. Astronomical observations and studies have found that dark matter accounts for about 60% of the universe. What exactly is this dark matter? There are many different opinions.
Therefore, it is particularly important to find a way to detect antimatter and dark matter! Thus, the "Alpha Magnetic Spectrometer" was born. "Alpha Magnetic Spectrometer" experiments by Chinese, Nobel laureate Zhaozhong Ding, more than 10 and many of the region participated in the research and design work. Its core component is a piece of outer diameter of 1.6 meters, inner diameter of 1.2 meters, weighing 2 neodymium-iron-boron ring-shaped permanent magnets, if you use conventional magnets, due to the influence of the magnetic field that pervades all over the world and can not be operated in space, and the use of superconducting magnets must be operated at ultra-low temperatures, but also impractical, what is the more appropriate material? Our country took the initiative to produce NdFeB permanent magnets that fully meet the requirements for space operation, and installed them in the Alpha Magnetic Spectrometer (AMS), for which NdFeB magnets provide powerful magnetic force to capture anti-matter and dark matter information.
The Value of Alpha Magnetic Spectrometers
The sensitivity of the Alpha Magnetic Spectrometer (AMS) for antimatter detection is more than 4-5 orders of magnitude higher than that of other experiments nowadays, and it can accurately measure the energy distributions of antiproton, positron and photon in space, search for anticarbon nuclei and anticohydrogen nuclei in the cosmic space, and possibly provide clues or answers for the search for dark matter.
"Alpha Magnetic Spectrometer" with the "Discovery" space shuttle invited to travel in space, and then return to earth together, but also in 2002 with the space shuttle formally stationed in the Alpha Space Station 3 to 5, then will reveal the mysteries of the universe to play a huge role in promoting the long-term scientific value is unlimited. Its long-term scientific value is even more unlimited.
