分子电偶极矩进动研究

发布时间：2018-04-22 09:16

本文选题：分子电偶极矩 + 驰豫过程　；参考：《华中科技大学》2014年硕士论文

【摘要】：惯性导航系统是利用惯性仪表测量运动载体在惯性空间的角运动和线运动的自主式导航系统。它根据载体运动微分方程组能够实时、精确地算出运动载体的位置、速度和姿态角。在惯性导航系统中，陀螺仪发挥了很重要的作用。陀螺仪是测量转动角速度的主要工具，它的主要特点是具有定轴性和进动性。一般常规陀螺仪和利用原子在静磁场作用下自旋进动实现的新型原子自旋陀螺仪都具有这些性质。本文以进动陀螺仪的工作原理为基础，提出了在静电场作用下利用分子电偶极矩进动来测量转动频率的初步方案。本文首先介绍了各种进动式陀螺仪的工作原理，然后以进动式陀螺仪的工作原理为基础，提出在静电场作用下以分子电偶极矩进动来测量转动频率的方案。对方案所需的分子种类进行了分析挑选，选择CH3F分子作为实验分子，并对其在静电场下进动的经典图像和量子图像进行了详细描述，同时阐述了该方案中涉及的物理过程和物理量。通过对常温下分子态感应电场幅值的分析，将分子态|J=6，，|K|=6㧐作为实验中的共振分子态，并利用提高静电场强度的方法抑制其它分子态的干扰。在静电场为5.0×104V/m，温度为300K，分子密度为2.7×1014cm-3的条件下，CH3F分子的进动频率为4.2×102MHz，感应电压幅值为10-6V，对转动频率的探测灵敏度可以达到100Hz的水平。另外，如果利用该方案测量电场，那么电场大小的测量精度可以达到0.07V/m。
[Abstract]:Inertial navigation system (ins) is an autonomous navigation system which uses inertial instruments to measure angular and linear motion of moving vehicles in inertial space. It can accurately calculate the position, velocity and attitude angle of the carrier according to the differential equations of motion. Gyroscopes play an important role in inertial navigation systems. Gyroscope is the main tool for measuring angular velocity of rotation, which is characterized by its fixed axis and precession. General conventional gyroscopes and new atomic spin-gyroscopes, which are realized by the spin-precession of atoms under the action of a static magnetic field, have these properties. Based on the working principle of precession gyroscope, a preliminary scheme for measuring rotational frequency by molecular electric dipole moment precession under electrostatic field is presented in this paper. This paper first introduces the working principle of various precession gyroscopes, and then, based on the working principle of precession gyroscopes, puts forward a scheme of measuring rotational frequency by molecular electric dipole moment precession under the action of electrostatic field. The kinds of molecules needed for the scheme are analyzed and selected. The CH3F molecule is selected as the experimental molecule, and the classical and quantum images of its precession under electrostatic field are described in detail. At the same time, the physical process and physical quantity involved in the scheme are expounded. By analyzing the amplitude of molecular state induction electric field at room temperature, the molecular states J _ (6), K _ (6)? As the resonant molecular state in the experiment, the interference of other molecular states is restrained by increasing the electrostatic field intensity. Under the condition of electrostatic field of 5.0 脳 10 ~ 4 V / m, temperature of 300K, molecular density of 2.7 脳 1014cm-3, the precession frequency of Ch _ 3F molecule is 4.2 脳 10 ~ 2 MHz, the amplitude of inductive voltage is 10-6 V, and the detection sensitivity to rotation frequency can reach the level of 100Hz. In addition, if this scheme is used to measure the electric field, the precision of measuring the electric field can reach 0.07 V / m.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN96

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