Three-electron-wave interference method for direct observation of electromagnetic micro-fields

1.建立了三电子波干涉图的计算机模拟方法。模拟了均匀带电乳胶球在碳薄膜上产生的电场的三电子波干涉图样。将模拟的图形与实验的图形进行比较，我们就可以估计出电荷量。模拟了磁偶极子产生的磁场的三电子波干涉图样。模拟了BaO铁氧体单个磁畴粒子周围磁场的三电子波干涉图样。磁场由磁偶极子模拟。将模拟的图形与T.Hirayama等人获得的干涉显微照片进行了比较，确定了来自BaFe铁氧体的磁通密度。计算机模拟使我们能够从实验的三波干涉图中提取可靠的定量信息。提出了用电子双棱镜直接观测电磁微场的方法。这种干涉方法比三波干涉方法更简单有效。

1. Computer simulation method of three-electron-wave interference patterns is established.2. Three-electron-wave interference patterns are simulated for the electric field generated by a uniformly charged latex sphere on a thin carbon film. Comparison of the simulated patterns with the experimental one enables us to estimate the amount of electric charge.3. Three-electron-wave interference patterns are simulated for the magnetic field produced by a magnetic dipole.4. Three-electron-wave interference patterns are simulated for a magnetic field around a single magnetic-domain particle of barium ferrite. The magnetic field is modeled by a magnetic dipole. The simulated patterns are compared with the interference micrograph obtained by T.Hirayama et al, and the density of the magnetic flux originating from the barium feritte is determined. The computer simulations allow us to extract the reliable quantitative information from thee xperimental three-wave interference patterns.5. The direct observation method of electromagnetic micro-fields with an electron biprism is proposed. This interference method is simpler and more effective than the three-wave interference one.