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Numerical simulation of chirped pulse free-electron laser amplifier

Author: PengTangChao
Tutor: ShuXiaoJian
School: Chinese Academy of Engineering Physics
Course: Optics
Keywords: Free-electron laser Amplifier Chirped pulse The energy chirp electronic beam Numerical Simulation
CLC: TN249
Type: Master's thesis
Year: 2008
Downloads: 73
Quote: 0
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Abstract


The free-electron laser (Free-electron Laser, FEL) with a relativistic electron beam subjected to stimulated emission amplification coherent light source in the excitation of the pump field \Chirped pulse amplification (Chirped PulseAmplification, CPA) technology is one of the main ways to achieve ultrashort pulse FEL . Linearly chirped pulse amplification of one-way FEL amplifier was simulated using the one -dimensional unsteady-state program , its main work is as follows : 1 . Introduces the basic theory of linearly chirped pulse generation and compression . When detuning is not zero , by solving FEL cubic equations discussed the relationship between the frequency detuning FEL gain . 3 . Discuss the mechanism of the gain down to the the FEL amplifier enlarged chirped pulse . Monoenergetic electron beam amplification of chirped pulse , the gain decrease was primarily due to larger detuning ingredients can not be effectively enlarged in the pulse . Energy chirped electron beam amplification of chirped pulse , the gain decrease was primarily due to the slippage of the electron beam so that the light field detuning caused . FEL amplifier and energy of a monoenergetic electron beam chirp chirped pulse electron beam FEL amplifier numerical simulation and analysis , calculate the different pulse chirp parameter extraluminal compression of the FEL amplifier . Informed by the results of numerical simulation : the chirped pulses can be Way FEL amplifier amplifies chirped pulse still has good compressibility and amplified , compressed pulse peak power can reach tens of GW , the width can be as short as dozens fs; FEL amplifier using energy chirped electron beam amplification chirped pulse , you can significantly improve the power gain of the pulse , and increases the gain linewidth of the FEL , the compressed pulse peak power of up to several hundred GW width short to a few fs . Use energy chirped electron beam the FEL amplifier chirped pulse compression pulse extraluminal effect can be greatly improved .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser applications
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