@article{oai:nifs-repository.repo.nii.ac.jp:00011493,
 author = {SHI, Nan and OHSHIMA,  Shinsuke and TANAKA,  Kenji and MINAMI,  Takashi and NAGASAKI,  Kazunobu and YAMAMOTO,  Satoshi and OHTANI, Yoshiaki and ZANG, Linge and MIZUUCHI,  Tohru and MIZUUCHI, Toru and OKADA,  Hiroyuki and KADO,  Shinichiro and KOBAYASHI, Shinji and KONOSHIMA,  Shigeru and KENMOCHI, Naoki and SANO,  Fumimichi},
 issue = {Special Issue 2},
 journal = {Plasma and Fusion Research},
 month = {May},
 note = {A multichannel far-infrared (FIR) laser interferometer is being developed for the helical-axis heliotron device Heliotron J with asymmetrical poloidal cross-section to study high-density plasma. Due to the shape of the cross-section, a new density reconstruction method based on the regularization technique was investigated for obtaining the electron density profile from the line-integrated density. For this purpose, the regularization parameter was optimized and determined by the generalized cross-validation (GCV) function and singular value decomposition (SVD). The reconstruction results show that the reconstructed profiles can be improved by carefully considering the beam position arrangement. The optimum beam arrangement is discussed in detail.},
 title = {Electron Density Reconstruction and Optimum Beam Arrangement of Far-Infrared Interferometer in Heliotron J},
 volume = {9},
 year = {2014}
}