掺杂超晶格与超相对论粒子同步辐射的稳定性  

Doping Super-lattice and Stability of Synchrotron Radiation of Ultra-relativistic Particles

作　　者：葛卫清[1] 吴木营[2] 李洪涛[2] 邵明珠[2] 罗诗裕[2] 

机构地区：[1]东莞理工学院城市学院,广东东莞523106 [2]东莞理工学院电子工程学院,广东东莞523106

出　　处：《半导体光电》2011年第6期803-806,共4页Semiconductor Optoelectronics

摘　　要：指出了对周期介质加上周期变化的电场,可望获得时空周期变化的周期场;在这种场中运动的带电粒子表现出人们预期的行为。讨论了超相对论情况下带电粒子的同步辐射,并以掺杂超晶格为例进行具体分析。在经典力学框架内和偶极近似下,把粒子的相位运动方程化为广义摆方程;讨论了带电粒子的同步辐射能量和系统的稳定性。结果表明,适当选择系统参数就可以保证系统的稳定性,如果选择势阱深度为1eV,周期为100nm,相对论因子为104时,电子的辐射频率可达1.25×1020 Hz,辐射进入X-能区。It is pointed out that applying the periodic electric field on the periodic media may obtain periodic field with the space-time periodic variation. Charged particles moving in this field show expected behaviors. In this paper, synchrotron radiation of the ultra-relativistic particles is discussed, and the doping super-lattices are analyzed as an example. In the framework of classical mechanics and the dipole approximation, the phase motion equation is reduced to a generalized pendulum equation for particles. The synchrotron radiation energy and the system stability of charged particles are discussed. The results show that appropriate systematic parameters can ensure the stability of the system, if the potential well depth is chosen to be 1 eV, period as 100 nm, and relativistic factor as 10^4, then the radiation frequency of electrons may be extended to 1.25× 10^20 Hz/s, and the radiation enters into the X-energy area.

关 键 词：掺杂超晶格 时空周期场 超相对论粒子 同步辐射 稳定性 

分 类 号：O437[机械工程—光学工程]