Chinese Physics C > 2008, Vol. 32 > Issue(S1): 253-255

Numerical Simulation of a Hybrid Undulator Applied in THz Radiation Source

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Abstract：
The undulator is the key component in the compact THz radiation source based on FEL. By matching the adjustable period magnetic field of the undulator with the optical resonance cavity, the passing electron beam will generate coherent radiation with gain, and the radiation power required by THz source can be achieved finally. Compared with the pure permanent magnet type, the hybrid type undulator can decrease the field errors caused by non-homogeneous magnetization of magnetic blocks, and provide higher magnetic field. The conceptual design of a hybrid undulator used for THz radiation source is introduced. We use the FEM code OPERA/TOSCA to simulate 3D magnetic field of the undulator. After optimizing the end structure of the hybrid undulator, the first field integrals is controlled within 0.01Gs﹒m, and the deviation of the electron beam is less than 0.02mm.

References

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. Krafft G A. Physical Review Special Topics-Acceleratorsand Beams, 2004, 7: 0607042. XIONG Yong-Qian et al. Chinese Physics C (HEP NP),2008, 32(Supp.Ⅰ): 301(in Chinese)(熊永前等. 中国物理C, 2008, 32(增刊Ⅰ): 301)3. CAI Gen-Wang, JIA Qi-Ka. HPL PB, 2005, 17(10): 1585—1589 (in Chinese)(蔡根旺, 贾启卡. 强激光与粒子束, 2005, 17(10): 1585—1589)4. Elleaume P et al. Nuclear Instruments and Methods inPhysics Research A, 2000, 455: 503-5235. Papadichev V A et al. Nuclear Instruments and Methods in Physics Research A, 2004, 532: 644-6516. OPERA3D user manual. Vector Fields Ltd. 20067. QIN Bin et al. Nuclear Instruments and Methods in Physics Research B, 2007, 261: 56-59

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QIN Bin, XIONG Yong-Qian, TAN Ping, PEI Yuan-Ji and FAN Ming-Wu. Numerical Simulation of a Hybrid Undulator Applied in THz Radiation Source[J]. Chinese Physics C, 2008, 32(S1): 253-255.

QIN Bin, XIONG Yong-Qian, TAN Ping, PEI Yuan-Ji and FAN Ming-Wu. Numerical Simulation of a Hybrid Undulator Applied in THz Radiation Source[J]. Chinese Physics C, 2008, 32(S1): 253-255. shu

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Received: 2008-01-11
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Numerical Simulation of a Hybrid Undulator Applied in THz Radiation Source

Corresponding author:QIN Bin,

Received Date:2008-01-11

Accepted Date:1900-01-01

Available Online:2008-01-04

Abstract:The undulator is the key component in the compact THz radiation source based on FEL. By matching the adjustable period magnetic field of the undulator with the optical resonance cavity, the passing electron beam will generate coherent radiation with gain, and the radiation power required by THz source can be achieved finally. Compared with the pure permanent magnet type, the hybrid type undulator can decrease the field errors caused by non-homogeneous magnetization of magnetic blocks, and provide higher magnetic field. The conceptual design of a hybrid undulator used for THz radiation source is introduced. We use the FEM code OPERA/TOSCA to simulate 3D magnetic field of the undulator. After optimizing the end structure of the hybrid undulator, the first field integrals is controlled within 0.01Gs﹒m, and the deviation of the electron beam is less than 0.02mm.

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Numerical Simulation of a Hybrid Undulator Applied in THz Radiation Source

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通讯作者:陈斌, bchen63@163.com

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