英国物理学会
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作者:R. Yasuhara , H. Funaba ...
来源:[J].Journal of Instrumentation(IF 1.869), 2019, Vol.14 (6)
摘要:We developed an yttrium aluminium garnet (YAG)-Thomson scattering (TS) system for measuring an electron temperature and density in the divertor simulation experimental module (D-module) plasma in GAMMA 10/PDX. We applied a frequency multiplied microwave interferometer (MIF) syste...
作者:R. Yasuhara , Y. Kosuga ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (7)
摘要:The abrupt and strong excitation of the geodesic acoustic mode (GAM) has been found in the large helical device (LHD), when the frequency of a chirping energetic particle-driven GAM (EGAM) approaches twice that of the GAM frequency. The temporal evolution of the phase relation be...
作者:R. Yasuhara , M. Yoshinuma ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (10)
摘要:The dependence of the energy confinement and energy transport on the isotope mass is a long-standing open question in the stellarator community. With the recent upgrade of the Large Helical Device to allow for deuterium plasma operation, systematic isotope experiments could ...
作者:R. Yasuhara , T. Ido ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (8)
摘要:A simultaneous high ion temperature ( T i) and high electron temperature ( T e) regime was successfully extended due to an optimized heating scenario in the LHD. Such high-temperature plasmas were realized by the simultaneous formation of an electron interna...
作者:R. Yasuhara , H. Funaba ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (11)
摘要:Surveys of the ion and electron heat transports of neutral beam (NB) heating plasma were carried out by power balance analysis in He and H rich plasma at LHD. Collisionality was scanned by changing density and heating power. The characteristics of the transport vary dependin...
作者:R. Yasuhara , M. Yoshinuma
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (6)
摘要:Transport studies of pellet fuelling experiments on LHD are reported. Spatio-temporal evolutions after pellet injection into LHD discharges show cases where central density increases on the time scale of particle transport processes. Both the temperature gradient and the den...
作者:R. Yasuhara , H. Funaba
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (8)
摘要:Impurity seeding to reduce the divertor heat load was conducted in the large helical device (LHD) using neon (Ne) and krypton (Kr) puffing. Radiation enhancement and reduction of the divertor heat load were observed. In the LHD, the ratio between the total radiated power and...
作者:R. Yasuhara , Y. Yoshimura ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (8)
摘要:n = 0 modes with frequency chirping have been observed by a heavy ion beam probe and Mirnov coils in the large helical device plasmas, where n is the toroidal mode number. The spatial structures of the electrostatic potential fluctuation and the density fluctuation correspond to ...
作者:R. Yasuhara , M. Sakamoto ...
来源:[J].Journal of Instrumentation(IF 1.869), 2015, Vol.10 (8)
摘要:A multi-pass (MP) Thomson scattering (TS) system modeled on the GAMMA 10/PDX TS system was constructed for enhancing the Thomson scattered signals. The MPTS system has a polarization-based configuration with an image relaying system. The former MPTS system in GAMMA 10/PDX can mea...

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