Simulation of the Coherent THz Radiation from a Variable Elliptically Polarized Undulator

ZHOU Qiao-Gen; DAI Zhi-Min; XU Hong-Jie

Chinese Physics C> 2004, Vol. 28> Issue(7) : 786-791

Simulation of the Coherent THz Radiation from a Variable Elliptically Polarized Undulator

Shanghai Institute of Applied Physics,Chinese Academy of Science,Shanghai 201800,China

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Abstract：
A new type of coherent THz light source is building in SINAP. It will use the femto-second electron beam passing through a variable elliptically polarized undulator to produce the high bright THz radiation with various linear, elliptical or circular polarization. The paper describes the computation methods and the simulation results of the flux density, spectrum, polarization and coherence for this kind of radiation. For the electron beam with the energy 20MeV, the emmitance 1 5πmm·mrad, the beam length 200fs and the electric charge 50pC, the THz radiation with the horizontal linear polarization or the circular polarization of the maximum flux density of 2×10 9 photons/mm 2/0 1%bw can be obtained at the distance 1m from the center of the undulator with 0 6m length.

References

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ZHOU Qiao-Gen, DAI Zhi-Min and XU Hong-Jie. Simulation of the Coherent THz Radiation from a Variable Elliptically Polarized Undulator[J]. Chinese Physics C, 2004, 28(7): 786-791.

ZHOU Qiao-Gen, DAI Zhi-Min and XU Hong-Jie. Simulation of the Coherent THz Radiation from a Variable Elliptically Polarized Undulator[J]. Chinese Physics C, 2004, 28(7): 786-791. shu

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Received: 2003-09-25
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Simulation of the Coherent THz Radiation from a Variable Elliptically Polarized Undulator

Corresponding author: ZHOU Qiao-Gen,

Shanghai Institute of Applied Physics,Chinese Academy of Science,Shanghai 201800,China

Received Date: 2003-09-25
Accepted Date: 1900-01-01
Available Online: 2004-07-05

Abstract: A new type of coherent THz light source is building in SINAP. It will use the femto-second electron beam passing through a variable elliptically polarized undulator to produce the high bright THz radiation with various linear, elliptical or circular polarization. The paper describes the computation methods and the simulation results of the flux density, spectrum, polarization and coherence for this kind of radiation. For the electron beam with the energy 20MeV, the emmitance 1 5πmm·mrad, the beam length 200fs and the electric charge 50pC, the THz radiation with the horizontal linear polarization or the circular polarization of the maximum flux density of 2×10 9 photons/mm 2/0 1%bw can be obtained at the distance 1m from the center of the undulator with 0 6m length.