Recent Developments in Magnetic Traps Using Cold-Atom Vacuum Measurements

The cold atom vacuum measurement is a new technique for ultra-high/extreme-high vacuum (UHV/XHV) measurements, which is traceable to the fundamental properties of atoms in an ideal magnetic trap and can establish vacuum primary metrology standards. Firstly, we summarize the binding performance of various types of magnetic traps by comparing and analyzing the magnitude of the magnetic field, magnetic trapping potential, and magnetic trapping parameters of different magnetic traps. Secondly, we investigated the domestic and international research on cold-atom vacuum measurements in magnetic traps. We reviewed the theoretical parameter calculations and equipment development experiments for realizing cold-atom primary vacuum standards. Finally, we provide an outlook on cold atom vacuum measurements in magnetic traps in terms of optimization and construction of magnetic traps.