研究弛豫对光磁共振信号的影响
关键词 光磁共振 弛豫过程 光抽运 g因子
毕业论文设计说明书（论文）外文摘要
Title Effect of magnetic resonance relaxation optical signal
Abstract
The influence of the relaxation process on the optical pumping signals,opto-magnetic resonance and g factor is investigated . The magnetic resonance and the method of measuring it are introduced. The studies on the optical-magnetic resonance at home and abroad can be referenced to, finding the advantages and disadvantages ,discovering the key of the experiments ,being sure to the importance of this experiment .The experimental apparatus and some basic principle are presented in chapter 2. Finally analysis the results of the experiment .It is shown that during the relaxation process , the optical pumping signals increases continuously when the relaxation tend to saturation. The oscilloscope quantitative measure the strength of the optical pumping signals changing with time during the relaxation process.Magnetic resonance signal light rises with the increasing of the relaxation process when entering RF magnetic field ,tracking the evolution of the signal intensity changes with time,finding out magnetic resonance signal light is much easier to reach the maximum than the optical pumping signals.Fixing the sweep field and changing the level field obtains g factor under different relaxation conditions. It is shown g factor doesn’t vary with the relaxation process .In the opto-magnetic resonance experiment ,enhancing the relaxation process makes for keeping the particle number distribution of the degree of polarization ,observing more apparent optical pumping signals.While the balance distribution of paticle numbers contributes to add zeeman energy level transition and increase he opto-magnetic resonance signals.However,the degree of polarization of particle numbers can’t change the value of zeeman energy level in interior atoms.In the steady-state magnetic field,the zeeman energy is steady,as a result,the opto-magnetic resonance needs the RF magnetic field that is fixed ,finally the relaxation process isn’t influent the measurement of g factor of rubidium atoms .
Keywords Optical resonance Optical pumping Relaxation process g factor
目 次
1 引言 1
1.1 磁共振 1
1.2 磁共振测量方法 1
1.3 国内外研究背景 2
1.4 实验研究意义 7