在飞秒范围内工作于30 nm波长的DESY的PDKEEPAAA-FEL辐射的统计特性
Statistical properties of the radiation from VUV FEL at DESY operating at 30 nm wavelength in the femtosecond regime
摘要：
自2005年春季以来，DESY的真空紫外自由电子激光（VUV FEL）作为用户设施在30 nm左右的波长范围内运行。真空紫外自由电子激光器的电子束形成系统本质上是非线性的，自然会导致在产生自由电子激光辐射的密度分布中形成一个短的高电流前沿峰。真空紫外自由电子激光飞秒工作模式的主要特点是产生峰值功率为GW级的短脉冲，脉冲宽度可达20 fs。本文详细研究了飞秒真空紫外自由电子激光的短脉冲效应，并对初步实验结果进行了分析。
英文摘要：
Since spring, 2005 vacuum ultraviolet free electron laser (VUV FEL) at DESY operates as user facility in the wavelength range around 30 nm. Electron beam formation system at the VUV FEL is essentially nonlinear and naturally results in a formation of a short high-current leading peak in the density distribution that produces FEL radiation. The main feature of the femtosecond mode of operation of the VUV FEL is the production of short, down to 20 fs radiation pulses with GW-level peak power. This paper is devoted to detailed studies of the short-pulse effects in the VUV FEL at DESY operating in the femtosecond regime, and to analysis of first experimental results.
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