Finding new particles outside the standard model of particle physics is very important for new physics exploration. The reporter learned from the University of Science and Technology of China that the academician Du Jiangfeng’s academic team has recently successfully developed a single-electron spin quantum sensor for searching “axon-like particles,†extending the power of search to the submicron scale. International authoritative academic journal "Nature Communications" recently published this result.
The discovery of new particles can be used to fill the current theoretical deficiencies in particle physics, astrophysics, and cosmology, such as particle quality level problems, strong CP problems, positive and negative matter asymmetry, and the physical nature of dark matter and dark energy.
In recent years, the international academic community has developed a series of sophisticated experimental devices to conduct electronic and nuclear interaction searches within a force range of 20 microns or more. However, to carry out experimental research within a shorter range of force, you face a series of challenges: how to build a small enough size sensor? How to design the sensor geometry to allow electrons and nucleons to get close enough? How to increase the sensitivity of the sensor to give a meaningful definition? How to effectively isolate the environmental noise, especially the inevitable electromagnetic noise?
Recently, Du Jiangfeng’s team of microscopic magnetic resonance labs led by the Chinese Academy of Sciences teamed up with scientists from the Department of Astronomy of the University of Science and Technology and the National Synchrotron Radiation Laboratory to propose and implement a new detection method, which is to electronically spin the near-surface diamond NV center of color. Used as a sensor to search for electron and nuclear interactions in the <20 micron range. They prepared NV color centers within 10 nanometers from the diamond surface as detectors, developed corresponding electronic devices and quantum control methods, and solved the above-mentioned problems that constrained short-range exploration. Experiments have shown that the new sensor can explore force ranges from 0.1 μm to 23 μm, providing new observational constraints for the exploration of electron-nucleus interactions.
According to reports, this new method can also be extended to other spin-related new interaction studies, thus providing the possibility of using single-spin quantum sensors to study new physics beyond the standard model, and is expected to stimulate cosmology and astrophysics. Widespread interest in various scientific fields such as high-energy physics.
structure
Casting elbow appearance
As the appearance of the welding elbow, then we say that the appearance of the casting elbow bar. Casting elbow appearance are fixed, of course, the general casting elbow appearance is according to different steel tube and to choose the different knowledge of casting elbow, so, in order to ensure the casting elbow appearance, usually Steel Pipe in the future, if not been yard rain washing off, then welding elbow after high temperature push general weld appearance of the elbow is appear out of the blue, of course, if the rain washed, we in high temperature after heating, heating welding elbow surface color are red. But overall, we guarantee tube is washed by the rain is very difficult, because is yard in summer is rain fog water washed, then push the system out of the welded elbow surface is red, too.
Photo of our Casting Bend:
technical requirement
Geometric dimensions include outside diameter, inside diameter and wall thickness. Also requires control
Bend in production
Radius of curvature. For example, the radius length is 1.5D, and the radius of curvature must be within the range of tolerances required. Due to these fittings, most used for casting, in order to improve the welding quality, end vehicles into the groove, leave a certain angle, side band, this requirement is quite strict, edge thick, at an angle of number and range of deviation provisions, geometric size than pipe much many. The surface quality and mechanical properties are basically the same as that of the tube. In order to facilitate welding steel, and the connecting pipe are the same. Fourth, is all the pipe fittings should be through the surface treatment, the inner and outer surface of the oxide scale through shot blasting, and then coated with anticorrosive paint. This is not only for export needs, in addition, in the country is to facilitate the transport to prevent rust oxidation, to do this work. Fifth is the packaging requirements, for small pipes, such as export, you need to do wooden, about 1 cubic meter, this provision in the case the number of elbows about not more than a ton, the standard allows the suit, large sets of small, but the total weight usually do not more than 1 ton. For large to a single package, like 24 "must be a single package. The other is labeled packaging, labeling is to indicate size, number, batch number, manufacturer trademark. In the pipe to be stamped on stamp, and attached to the packing list and the quality book file.
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