5 nm-scale surface evenness movement measurement method based on the electron spin in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-12-14 |
| Journal | Laser Physics Letters |
| Authors | Yusong Liu, Shixin Wang, Yue Qin, Hao Guo, Zhonghao Li |
| Institutions | North University of China, The University of Osaka |
| Citations | 1 |
Abstract
Section titled āAbstractāAbstract The motion of a magnetic levitation structure can lead to low accuracy for magnetically suspended control moment gyros (MSCMG), artificial heart pumps or high precision stable platforms. Measuring this motion is important in orbital navigation and precision measurement technologies, but current methods are unable to measure it with high accuracy under a strong magnetic field around the magnetic levitation structure. Here, we present a method in which nitrogen-vacancy (NV) centers in diamond have been used as a sensor to detect the movement of the magnetic levitation structure. The NV quantum sensors probe the electric field around the suspension magnet induced by the magnet fluctuations. Based on the high sensitivity of 0.3 nT (āHz) ā1 , the resolution of motion was about 5 nm. Also, the dynamic movement of the magnetic levitation system has been recorded in real-time with a potential resolution of ā¼pm as the magnetic field sensitivity of NV center was improved to ā¼pT. Our method offers a novel route to measure and feedback control the magnetic levitation system for MSCMGs in satellite attitude or for magnetic pumps in artificial heart applications.