摘要
对于远红外自由电子激光使用的大尺度(10m量级)准同心光腔,由于短脉冲效应严重影响功率演化,光束团的数值模拟必须同时考察时域 空域中的演化,因此计算量是巨大的。为了缩小计算量但又不失精确度,发展了一种称为"惠更斯变换"的公式,它以简单的类似基尔霍夫 费涅尔公式的积分运算精确地重现了波荡器之外的光束团演化。
The large scale (ten/tens meters) quasi-concentric cavity used in high average output power far-infrared PEL and the short-pulse effects require that the numerical simulation must involve evolution in both space and time, which means huge quantity of calculating. To decrease quantity of calculating and keep accuracy, a new calculating method named Heggens transform is developed which is an integral expression similar to the Kirchhoff-Fresnel expression and can be applied out of undulator.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2003年第1期5-8,共4页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
