电偶极辐射。辐射场，近场。辐射功率。实例：圆周运动之电荷。
Electric Dipole Radiation. The Radiation Field, the Near Fields. Radiated Power. Example: Charge in Circular Motion.
在漂移区中考虑直流空间电荷场的影响。我们发现电子运动在该区服从一振荡方程；
We find out that, in drift, region, the motion equation of electron is an oscillation one, which influences the prcbunching of electrons.
在漂移区中考虑直流空间电荷场的影响。我们发现电子运动在该区服从一振荡方程；
We find out that, in drift, region, the motion equation of electron is an oscillation one, which influences the prcbunching of electrons.
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