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Current Status of Collaboration Research

Current Status of Collaboration Research. KAGRA Collaborators Korea Univ., KIAS, Inje Univ., Korea Univ., Yongji Univ., Seoul National Univ., Korea Atomic Energy Research Institute , Hanyang Univ., Pusan National Univ., KISTI , Korea NIMS, Kyungpook National Univ.,

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Current Status of Collaboration Research

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  1. Current Status of Collaboration Research KAGRA Collaborators Korea Univ., KIAS, Inje Univ., Korea Univ., Yongji Univ., Seoul National Univ., Korea Atomic Energy Research Institute , Hanyang Univ., Pusan National Univ., KISTI , Korea NIMS, Kyungpook National Univ., Kunsan National Univ., KIAS , IISER-TVM, Phys.S. Univ. of Western Australia, Louisiana State Univ., CCRG Rochester Institute of Technology, Beijing Normal Univ., Inter-University Center for Astronomy and Astrophysics, Moscow Univ., LATMOS/CNRS, Univ. of Science and Technology of China, Inst. for High Energy Physics of Chinese Academy of Sciences, Peking Univ., CMS ITR Taiwan, Maryland Univ., Columbia Univ., Glasgow Univ., SannioUniv., Shanghai Normal Univ., National TsingHua Univ., KAGRA Collaborators ICRR, Univ. of Tokyo National Astronomical Observatory of Japan, High Energy Accelerator Research Organization, Phys.S. Univ. of Tokyo, GSFS Univ. of Tokyo, F.Eng. Univ of Tokyo, Tokyo Institute of Technology, Osaka City Univ., Phys.S. Kyoto Univ., Electro Communication Univ., ERI. Univ of Tokyo, Astro. Univ. of Tokyo, Hosei Univ., AIST, NICT, Phys.S. Osaka Univ., YITP Kyoto Univ., Phys.S. Ochanomizu Univ., ARISH Nihon Univ., S.Niigata Univ., Yamanashi-Eiwa Univ., CIT Nihon Univ., FST Hirosaki Univ., S. Tohoku Univ., S. Rikkyo Univ., S. Hiroshima Univ., S. Ryukyu Univ., FSE Waseda Univ., Gunma Astronomical Observatory, Sokendai, Teikyo Univ., Max Plank Inst. AEI, California Institute of Technology, Kyuman Cho and Shinji Miyoki Sogang University, Institute for Cosmic Ray Research and LCGT Collaboration • 3rdJapan-Korea Workshop on LCGT, Dec.21-22 2012 • Sogang University. Seoul, Korea

  2. First Collaboration Activity • Period : from Aug 20(mon) to 24(fri), 2012. • Miyoki visited Pro.Kyuman Cho in Sogang University to find collaboration items for KAGRA from the point of view of interferometric technique. • Thank you very much for the great Pro.Kyuman Cho’s accommodation during my visit (lodge preparation, lunch and dinner discussion, Labo-tour, Office room, communication chances with graduate students …) 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  3. Weekly Activities 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  4. Weekly Activities 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  5. Possible Collaboration Ideas • Mirror curvature measurement using Heterodyne interferometer using a double pass in an AOM. (MIR ?) • Mirror surface reflectivity monitoring system during operation. (AOS?) • Mirror local motion sensor with wide range. (AOS?, Detchar? VIS?) 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  6. Techniques from Prof. Cho • Heterodyne interferometer using double pass in AOM • Can be used for measuring the radius of curvature of the mirror or controlling the tilt of the mirror AOM Incident Beam QWP PBS Mirror AOM Driver M3 PD2 To LO input of the I/Q-demodulator i2 + - To RF input of the I/Q-demodulator i1-i2 i1 PD1 DA 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  7. Techniques from Prof. Cho • Balanced interferometer for measuring radius of curvature of a mirror or controlling the tilt of a mirror Mirror QWP PBS 1 PBS 2 LASER HWP 2 HWP 1 P 1 PBS 3 RP PD1 P 2 PD2 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  8. Techniques from Prof. Cho • Wide dynamic range displacement sensor for mirror position control 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  9. MIF works • MIF is responsible for the most important and central part of IFO length and alignment control system. • It contains most advanced techniques are concentrated for ultra-precise length measurement, that are expected to attract researchers who have same interests. • Some techniques are related with SQL beating, Macroscopic-Quantum mechanics and so on. • We expect some collaboration researchsin this related fields because you can produce “papers” ! 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

  10. Summary • The collaboration with Pro. Kyuman Cho has just started. • Some proposals that were related with MIR, AOS, VIS and DetChar were discussed. • We would like to discuss these collaboration with KAGRA subgroup chiefs. • We would like to find collaboration items about MIF and future technique for precise measurement system. 3rd Korea-Japan Workshop on KAGRA, Dec.20-21 2012, Korea Sogang Univ., Korea

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