Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Asahara, Makoto*; Iwasaki, Kodai*; Kamiya, Tomohiro; Mizuno, Kyohei*; Iwatsuki, Kazuma*; Miyasaka, Takeshi*
Konsoryu, 38(2), p.175 - 185, 2024/06
Breakup of a single droplet induced by a high-velocity gas flow behind a shock wave was observed with high spatio-temporal accuracy imaging, and the behavior of fragment formation was observed. In the high Weber number region corresponding to catastrophic breakup, the wavelength of the upstream interfacial wave of the droplet was larger than the critical wavelength of the Kelvin-Helmholtz instability (wavelength in the stability region), which was roughly consistent with the theoretical wavelength of the Rayleigh-Taylor instability. Therefore, the upstream interfacial wave of the droplet is generated by the development of small disturbances due to the Rayleigh-Taylor instability. The measured fragment diffusion widths were found to be independent of the Weber number.
ion sourceTakado, Naoyuki*; Hanatani, Junji*; Mizuno, Takatoshi*; Kato, Kyohei*; Hatayama, Akiyoshi*; Hanada, Masaya; Seki, Takayoshi; Inoue, Takashi
Review of Scientific Instruments, 77(3), p.03A533_1 - 03A533_3, 2006/03
Times Cited Count：14 Percentile：55.09(Instruments & Instrumentation)Surface production and transport process of H ions are numerically simulated to clarify the origin of H beam non-uniformity. A three-dimensional transport code using Monte Carlo method has been applied to productions of H
atoms and H ions in a large negative ion source under the Cs seeded condition. The results show that a large fraction of hydrogen atoms are produced in a high electron temperature region. This leads to a spatial non-uniformity of H atom flux to the plasma grid where H atoms capture electrons and converted to H ions. In addition, most surface-produced H ions are extracted even through the high electron temperature region without destruction.
Takato, Naoyuki; Hanatani, Junji*; Kato, Kyohei*; Mizuno, Takatoshi*; Hatayama, Akiyoshi*; Tobari, Hiroyuki; Hanada, Masaya; Inoue, Takashi; Taniguchi, Masaki; Hasebe, Mieko; et al.
no journal, ,
no abstracts in English
