Generation of Intense Narrow-Band Tunable Terahertz Radiation from Highly Bunched Electron Pulse Train

We present the analysis and start-to-end simulation of an intense narrow-band terahertz (THz) source with a broad tuning range of radiation frequency, using a single-pass free electron laser (FEL) driven by a THz-pulse-train photoinjector. The fundamental radiation frequency, corresponding to the sp...

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Bibliographic Details
Published in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2016-07, Vol.37 (7), p.649-657
Main Authors: Li, Heting, Lu, Yalin, He, Zhigang, Jia, Qika, Wang, Lin
Format: Article
Language:English
Subjects:
Classical Electrodynamics
Electrical Engineering
Electron beams
Electronics and Microelectronics
Engineering
Free electron lasers
Frequency ranges
Harmonic generations
Instrumentation
Laser beams
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Summary:We present the analysis and start-to-end simulation of an intense narrow-band terahertz (THz) source with a broad tuning range of radiation frequency, using a single-pass free electron laser (FEL) driven by a THz-pulse-train photoinjector. The fundamental radiation frequency, corresponding to the spacing between the electron microbunches, can be easily tuned by varying the spacing time between the laser micropulses. Since the prebunched electron beam is highly bunched at the first several harmonics, with the harmonic generation technique, the radiation frequency range can be further enlarged by several times. The start-to-end simulation results show that this FEL is capable of generating a few tens megawatts power, several tens micro-joules pulse energy, and a few percent bandwidth at the frequencies of 0.5–5 THz. In addition, several practical issues are considered.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-016-0258-9