新型准光学可调辐射源研究
Novel Quasi-Optical Tunable Radiation Source
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摘要: 本文介绍一种新型毫米波准光学可调辐射源，它采用由面对称三反射镜准光学谐振腔和绕射光栅组成高频互作用系统，利用中等能量级的相对论带状电子注激励,产生频率可调的宽带毫米波、远红外波段的辐射。这种新方案的机理性实验在电子科技大学首次获得成功，其主要实验参数：电子注的能量为400~500kV，电压脉冲宽度70ns，同步脉冲磁场强度1.2T; 磁场脉冲宽度10ms，带状电子注尺寸10nm×1mm；通过热测实验，我们成功地检测到3mm波段的高频信号，其峰值功率达到数十千瓦量级。Abstract: This paper describes a novel quasi-optical tunable radiation source with relativistic electron beam of middle energy and a quasi-optical resonator complied with diffraction grating and three-mirror reflector. Coherent radiation with peak power of several tens of kW at 3mm waveband is successfully detected from an experimental facility characterized by beam energy of 400—500 kV, pulse length of 70 ns, pulse beam current of 0.2 kA, and pulse magnetic field of up to 1.2 T.
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Key words:
- relativistic electron beam /
- open resonator /
- smith-purcell effect /
- fel
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