Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. I: Formulation
Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. I: Formulation
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DOI：
10.1103/physrevstab.8.030701
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发表时间：
2005-03
影响因子：
--
通讯作者：
A. Gover
中科院分区：
文献类型：
--
作者：
A. Gover
本文给出了描述聚束电子束超辐射和受激超辐射辐射特性的公式。辐射以每个辐射模式的功率和光谱功率来表征，其提供了对由辐射源发射的有用的空间相干辐射功率和光谱功率的测量。当聚束电子束发射超辐射时，这些参数的比例就像电子数量的平方，比自发辐射多几个数量级。该公式适用于从单个聚束，在一个宏脉冲，或周期性聚束有限数量的聚束发射。它可以用于任何类型的电子束辐射方案。导出了相干同步辐射和预聚束自由电子激光的具体解析表达式，为比较和理解它们之间的联系提供了依据。
A formulation for the characterization of superradiant and stimulated-superradiant radiative emission from bunched electron beams is presented. The radiation is characterized in terms of power and spectral power per radiation mode, which provide a measure of the useful spatially coherent radiation power and spectral power emitted by a radiation source. When the bunched electron beam emits superradiantly, these parameters scale like the square of the number of electrons, orders of magnitude more than spontaneous emission. The formulation applies to emission from single bunches, a finite number of bunches in a macropulse, or periodic bunching. It can be employed on any kind of e-beam radiation scheme. Specific analytic expressions are derived for coherent synchrotron radiation and prebunched free-electron laser, providing a basis for comparing and understanding their connection.