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C. Yamazaki,E. Ikawa,I. Tominaga,T. Saito,I. Uchiki,Y. Takami,S. Yamada 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
A 3 ㎿-class high-precision IGBT chopper type power supply was developed for the bending electromagnets of the Heavy-Ion Facility at Gunma University. The current ripple was smaller than ±1×10??, and the current tracking error was smaller than ±1×10?⁴. Heavy ion beams were successfully accelerated with this power supply, and medical treatment commenced on 16th March 2010.
Chandra, I.,Kim, S.,Seto, T.,Otani, Y.,Takami, A.,Yoshino, A.,Irei, S.,Park, K.,Takamura, T.,Kaneyasu, N.,Hatakeyama, S. Pergamon Press ; Elsevier [distribution] 2016 Atmospheric environment Vol.141 No.-
<P>Field observations to investigate the correlation between New Particle Formation (NPF) and the long-range transport of air pollutants in the East Asia region were carried out on a rural Island of Japan in the East-China Sea (Fukue Island, 32.8 degrees N, 128.7 degrees E) over three periods (February 23 to March 7, 2013; November 7 to 20, 2013; and November 2 to 24, 2014). Frequent NPF events were identified (16 events in 50 days), typically in association with sudden increases in particle number concentrations and the successive growth of particles to mobility diameters of several tens of nanometers. The NPF events were classified into two types (A and B) according to the initially detected particle sizes (onset diameters). Type-A consisted of strong NPF events with onset diameters as small as 5 nm. Type-B consisted of NPF events whose onset (<10 nm) was not clearly identifiable. The correlations of SO2 concentrations, solar radiation, PM2.5 concentrations, and chemical composition were analyzed based on the types of NPF events. (C) 2016 Elsevier Ltd. All rights reserved.</P>