@article{oai:nifs-repository.repo.nii.ac.jp:00000482,
 author = {YOSHINAGA,  Tomokazu and NAGAYAMA,  Yoshio and KUWAHARA,  Daisuke and TSUCHIYA,  Hayato and YAMAGUCHI,  Soichiro and KOGI,  Yuichiro and TSUJI-IIO,  Shunji and HOJO,  Hitoshi and MASE,  Atsushi},
 journal = {Plasma and Fusion Research, Plasma and Fusion Research},
 month = {Jan},
 note = {An optics system for microwave imaging reflectometry (MIR) in the Large Helical Device (LHD) was newly developed to optimize the performance of the two-dimensional microwave receiver array. Reflected microwaves from the plasma and the first local oscillator (LO) wave are transmitted to the receiver array via the optics from the front. Finite-difference time-domain (FDTD) calculation was used to design the ellipsoidal or hyperboloidal shapes of the quasi-optical mirrors. It is confirmed that the LO beam in the constructed system covers the receiver antenna aperture area as intended. The S/N ratios of the signals are improved with this optimized optics system from those in the previous system.},
 title = {Optics Design for Microwave Imaging Reflectometry in LHD},
 volume = {5},
 year = {2010}
}