@article{oai:nifs-repository.repo.nii.ac.jp:00010865,
 author = {TSUJIMIRA, Toru and TSUJIMURA, Toru Ii and YANAI, Ryohma and MIZUNO,  Yoshinori and TANAKA,  Kenji and YOSHIMURA,  Yasuo and TOKUZAWA,  Tokihiko and NISHIURA,  Masaki and SAKAMOTO,  Ryuichi and MOTOJIMA,  Gen and KUBO,  Shin and SHIMOZUMA,  Takashi and IGAMI,  Hiroe and TAKAHASHI,  Hiromi and YOSHINUMA,  Mikiro and YOSHINUMA,  Mikirou and Ohshima,  Shinsuke and LHD, Experiment Group},
 issue = {2},
 journal = {Nuclear Fusion},
 month = {Dec},
 note = {0000-0002-2983-5920, A real-time interlock system for power injection in electron cyclotron resonance heating
(ECRH) was developed to be applied to Large Helical Device (LHD) plasma. This system
enabled perpendicular injection, thus improving the performance of ECRH more than has ever
been achieved before in LHD. Perpendicular propagation of the electron cyclotron wave at
77 GHz became more insensitive to the effect of refraction in comparison to the conventional
oblique propagation. The achieved central electron temperature in the case of perpendicular
injection was approximately 2 keV higher than that in the case of standard oblique injection
for a central electron density of 1 × 1019 m−3 by 1 MW injection.With such improved
performance of ECRH, high-density ECRH plasma of 8 × 1019 m−3 was successfully
sustained after the injection of multiple hydrogen ice pellets for the first time in LHD.},
 title = {Improved performance of electron cyclotron resonance heating by perpendicular injection in the Large Helical Device},
 volume = {61},
 year = {2020}
}