Study on generation of variable polarized coherent THz radiation using a crossed undulator

Hirotoshi Saito; Hiroyuki Hama; Fujio Hinode; Ken Kanomata; Shigeru Kashiwagi; Sadao Miura; Toshiya Muto; Ikurou Nagasawa; Ken Ichi Nanbu; Shingo Ninomiya; Ken Takahashi

doi:10.18429/JACoW-LINAC2018-MOPO076

Study on generation of variable polarized coherent THz radiation using a crossed undulator

Hirotoshi Saito, Hiroyuki Hama, Fujio Hinode, Ken Kanomata, Shigeru Kashiwagi, Sadao Miura, Toshiya Muto, Ikurou Nagasawa, Ken Ichi Nanbu, Shingo Ninomiya, Ken Takahashi

Research Center for Electron Photon Science (ELPH)

Tohoku University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A variable polarized THz radiation source using a crossed undulator system has been developed at Tohoku University. In this scheme, two coherent undulator radiations from an extremely short electron bunch are used to control the polarization. They are linearly polarized radiations orthogonal to each other. Polarization of superimposed radiation is controlled by adjusting a relative phase between them. A compact planar undulator with seven periods has been designed for an experiment at our facility. The radiation frequency is 2.06 THz for electron beam energy of 22 MeV. The opening angle of the crossed undulator radiation was estimated to be 34 mrad (FWHM). Since the polarization state of the crossed undulator depends on observation angle, its angular dependence was evaluated. It was found that ideal polarization control is realized only in the angle range of 2.5 mrad, which is quite smaller than that of the radiation itself.

Original language	English
Title of host publication	Proceedings of the 29th Linear Accelerator Conference, LINAC 2018
Publisher	JACoW Publishing
Pages	157-159
Number of pages	3
ISBN (Electronic)	9783954501946
DOIs	https://doi.org/10.18429/JACoW-LINAC2018-MOPO076
Publication status	Published - 2020
Event	29th International Linear Accelerator Conference, LINAC 2018 - Beijing, China Duration: 2018 Sept 16 → 2018 Sept 21

Publication series

Name	Proceedings of the 29th Linear Accelerator Conference, LINAC 2018

Conference

Conference	29th International Linear Accelerator Conference, LINAC 2018
Country/Territory	China
City	Beijing
Period	18/9/16 → 18/9/21

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10.18429/JACoW-LINAC2018-MOPO076

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Saito, H., Hama, H., Hinode, F., Kanomata, K., Kashiwagi, S., Miura, S., Muto, T., Nagasawa, I., Nanbu, K. I., Ninomiya, S., & Takahashi, K. (2020). Study on generation of variable polarized coherent THz radiation using a crossed undulator. In Proceedings of the 29th Linear Accelerator Conference, LINAC 2018 (pp. 157-159). (Proceedings of the 29th Linear Accelerator Conference, LINAC 2018). JACoW Publishing. https://doi.org/10.18429/JACoW-LINAC2018-MOPO076

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title = "Study on generation of variable polarized coherent THz radiation using a crossed undulator",

abstract = "A variable polarized THz radiation source using a crossed undulator system has been developed at Tohoku University. In this scheme, two coherent undulator radiations from an extremely short electron bunch are used to control the polarization. They are linearly polarized radiations orthogonal to each other. Polarization of superimposed radiation is controlled by adjusting a relative phase between them. A compact planar undulator with seven periods has been designed for an experiment at our facility. The radiation frequency is 2.06 THz for electron beam energy of 22 MeV. The opening angle of the crossed undulator radiation was estimated to be 34 mrad (FWHM). Since the polarization state of the crossed undulator depends on observation angle, its angular dependence was evaluated. It was found that ideal polarization control is realized only in the angle range of 2.5 mrad, which is quite smaller than that of the radiation itself.",

author = "Hirotoshi Saito and Hiroyuki Hama and Fujio Hinode and Ken Kanomata and Shigeru Kashiwagi and Sadao Miura and Toshiya Muto and Ikurou Nagasawa and Nanbu, {Ken Ichi} and Shingo Ninomiya and Ken Takahashi",

note = "Publisher Copyright: Content from this work may be used under the terms of the CC BY 3.0 licence ({\textcopyright} 2018).; 29th International Linear Accelerator Conference, LINAC 2018 ; Conference date: 16-09-2018 Through 21-09-2018",

year = "2020",

doi = "10.18429/JACoW-LINAC2018-MOPO076",

language = "English",

series = "Proceedings of the 29th Linear Accelerator Conference, LINAC 2018",

publisher = "JACoW Publishing",

pages = "157--159",

booktitle = "Proceedings of the 29th Linear Accelerator Conference, LINAC 2018",

}

Saito, H, Hama, H , Hinode, F, Kanomata, K, Kashiwagi, S, Miura, S, Muto, T, Nagasawa, I, Nanbu, KI, Ninomiya, S & Takahashi, K 2020, Study on generation of variable polarized coherent THz radiation using a crossed undulator. in Proceedings of the 29th Linear Accelerator Conference, LINAC 2018. Proceedings of the 29th Linear Accelerator Conference, LINAC 2018, JACoW Publishing, pp. 157-159, 29th International Linear Accelerator Conference, LINAC 2018, Beijing, China, 18/9/16. https://doi.org/10.18429/JACoW-LINAC2018-MOPO076

Study on generation of variable polarized coherent THz radiation using a crossed undulator. / Saito, Hirotoshi; Hama, Hiroyuki ; Hinode, Fujio et al.
Proceedings of the 29th Linear Accelerator Conference, LINAC 2018. JACoW Publishing, 2020. p. 157-159 (Proceedings of the 29th Linear Accelerator Conference, LINAC 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Study on generation of variable polarized coherent THz radiation using a crossed undulator

AU - Saito, Hirotoshi

AU - Hama, Hiroyuki

AU - Hinode, Fujio

AU - Kanomata, Ken

AU - Kashiwagi, Shigeru

AU - Miura, Sadao

AU - Muto, Toshiya

AU - Nagasawa, Ikurou

AU - Nanbu, Ken Ichi

AU - Ninomiya, Shingo

AU - Takahashi, Ken

PY - 2020

Y1 - 2020

N2 - A variable polarized THz radiation source using a crossed undulator system has been developed at Tohoku University. In this scheme, two coherent undulator radiations from an extremely short electron bunch are used to control the polarization. They are linearly polarized radiations orthogonal to each other. Polarization of superimposed radiation is controlled by adjusting a relative phase between them. A compact planar undulator with seven periods has been designed for an experiment at our facility. The radiation frequency is 2.06 THz for electron beam energy of 22 MeV. The opening angle of the crossed undulator radiation was estimated to be 34 mrad (FWHM). Since the polarization state of the crossed undulator depends on observation angle, its angular dependence was evaluated. It was found that ideal polarization control is realized only in the angle range of 2.5 mrad, which is quite smaller than that of the radiation itself.

AB - A variable polarized THz radiation source using a crossed undulator system has been developed at Tohoku University. In this scheme, two coherent undulator radiations from an extremely short electron bunch are used to control the polarization. They are linearly polarized radiations orthogonal to each other. Polarization of superimposed radiation is controlled by adjusting a relative phase between them. A compact planar undulator with seven periods has been designed for an experiment at our facility. The radiation frequency is 2.06 THz for electron beam energy of 22 MeV. The opening angle of the crossed undulator radiation was estimated to be 34 mrad (FWHM). Since the polarization state of the crossed undulator depends on observation angle, its angular dependence was evaluated. It was found that ideal polarization control is realized only in the angle range of 2.5 mrad, which is quite smaller than that of the radiation itself.

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T3 - Proceedings of the 29th Linear Accelerator Conference, LINAC 2018

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BT - Proceedings of the 29th Linear Accelerator Conference, LINAC 2018

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ER -

Saito H, Hama H , Hinode F, Kanomata K, Kashiwagi S, Miura S et al. Study on generation of variable polarized coherent THz radiation using a crossed undulator. In Proceedings of the 29th Linear Accelerator Conference, LINAC 2018. JACoW Publishing. 2020. p. 157-159. (Proceedings of the 29th Linear Accelerator Conference, LINAC 2018). doi: 10.18429/JACoW-LINAC2018-MOPO076

Study on generation of variable polarized coherent THz radiation using a crossed undulator

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