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Observation of disossiative recombination in the hydrogen sheet plasma
akira Tonegawa,Hiroie MATSUMOTO,Hiroyuki YAZAWA,Kazutaka KAWAMURA,Masataka ONO,Takehisa SHIBUYA 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The experimental observation of dissociative recombination in Molecular Assisted Recombination (MAR) for hydrogen detached plasma has been studied in the linear divertor plasma simulator, TPD-SheetIV. Measurements of the relative concentrations of atomic and molecular ions (nH+, n+ H2, and n+ H3), electron density (ne), electron temperature (Te), and heat load to the target plate (Q) were carried out in hydrogen detached plasma with hydrogen gas puff at varying discharge current. An “omegatron” mass analyzer, situated behind a small hole of the endplate, is used for analyzing ion species. It is shown from these results that the dominant molecular process is a dissociative recombination process via H+ 2 , H+ 3 in the plasma over the range of low plasma density (<5 × 1018 m.3) and low hydrogen pressure (<4 mTorr). In contrast, molecular assisted dissociation (MAD) always dominates over the MAR in the high density plasma (>5 × 1018 m.3).
Development of Wheeled Inverted Pendulum Type Personal Mobility with Pedal
Seonghee Jeong,Yuji Masuda,Yutaka Hiroi,Takayuki Takahashi,Osamu Matsumoto 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
In this paper, the mechanism and basic driving function of a wheeled inverted pendulum-type personal mobility with a pedal (Wi-PMP) are described. The mobility consists of a wheeled inverted pendulum-type mobile platform and a leg rowing mechanism, and thus it can be driven by a rider’s leg rowing motion. Moreover, to retain the merits of pivot turning of a parallel two-wheeled mobility, a differential gear box and a one-way clutch are installed between the pedal and the wheel shafts. It is designed such that a rider can ground his feet while sitting on the saddle. In addition, the Wi-PMP is compact and light-weight, and thus it can be driven and parked in a narrow space. Through experiments using three types of driving mode(motor driving, pedal driving, and assist driving), it was confirmed that mobility can realize all driving modes and pivot turning while keeping the feet of the rider on the pedals.