金刚石中的氮空位(NV)色心具有极佳的量子性质,并且对温度和磁场敏感,为温度与磁场的精密测量提供了新的解决方案。提出一种基于金刚石NV色心的温度和磁场同步测量方法。NV色心自旋塞曼劈裂能级随温度同向移动、随磁场反向移动。通过对劈裂能级同时进行光探测磁共振探测,并结合频率调制解调技术,实现了对温度和磁场的同步测量。自旋双共振系统的3 d B带宽为1 k Hz。在激光功率400 m W、自旋劈裂能级对的驱动微波功率分别为30 d Bm和35 d Bm时,温度灵敏度和磁灵敏度分别约为0.4mK/√Hz和1.1nT/√Hz。温度测量对磁场的隔离度约10 d B。该技术为大动态范围温度与磁场的同步测量提供了解决方案。
A differential equation that is generally effective for squeeze film air damping of perforated plate and non perforated plate as well as in MEMS devices is *** perforated plate,the thickness and the dimensions of th...
详细信息
A differential equation that is generally effective for squeeze film air damping of perforated plate and non perforated plate as well as in MEMS devices is *** perforated plate,the thickness and the dimensions of the plate are not *** boundary conditions,pressure distribution and the damping force on the plate can be found by solving the differential *** expressions for damping pressure and damping force of a long strip holeplate are presented with a finite thickness and a finite *** the extreme conditions of very thin plate and very thin hole,the results are reduced to the corresponding results of the conventional Reynolds' ***, the effectiveness of the generalized differential equation is ***,the generalized Reynolds' equation will be a useful tool of design for damping structures in MEMS.
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