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TY - CONF AU - Kashiwagi, S. AU - Hama, H. AU - Hinode, F. AU - Irizawa, A. AU - Muto, T. AU - Nagasawa, I. AU - Nanbu, K. AU - Saito, H. AU - Zen, H. ED - McIntosh, Peter ED - Burt, Graeme ED - Apsimon, Robert ED - Schaa, Volker R.W. TI - Manipulation and Measurement of Polarization State for THz Coherent Undulator Radiation J2 - Proc. of LINAC2022, Liverpool, UK, 28 August-02 September 2022 CY - Liverpool, UK T2 - International Linear Accelerator Conference T3 - 31 LA - english AB - We are developing an accelerator-based terahertz source that can produce arbitrary polarization states from linearly polarized coherent undulator radiation (CUR). The polarization manipulation of the CUR can be realized using the Martin’Puplett interferometer employed as an optical phase shifter. This study also demonstrates a variable polarization manipulator by using the terahertz CUR (THz-CUR) source based on an extremely short electron bunch at Research Center for Electron Photon Science (ELPH), Tohoku University. The horizontally polarized CUR with a frequency of 1.9 THz was manipulated into variable polarization state, and Stokes parameters were measured to derive the degree of polarization. Beam experimental results will be presented in this conference. PB - JACoW Publishing CP - Geneva, Switzerland SP - 69 EP - 72 KW - polarization KW - electron KW - radiation KW - undulator KW - linac DA - 2022/09 PY - 2022 SN - 2226-0366 SN - 978-3-95450-215-8 DO - doi:10.18429/JACoW-LINAC2022-MOPOJO18 UR - https://jacow.org/linac2022/papers/mopojo18.pdf ER -