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Journal Articles

The EPICS-based remote control system for muon beam line devices J-PARC MUSE

Ito, Takashi; Nakahara, Kazutaka*; Kawase, Masato; Fujimori, Hiroshi*; Kobayashi, Yasuo*; Higemoto, Wataru; Miyake, Yasuhiro*

Journal of Physics; Conference Series, 225, p.012022_1 - 012022_5, 2010/06

 Times Cited Count:1 Percentile:53.11

The Experimental Physics and Industrial Control System (EPICS) provides software infrastructure and framework for building distributed control systems (DCS) to operate beam line devices. The DCS based on EPICS has been adopted by many accelerator facilities in the world, where reliability, maintainability, and scalability of the system have been demonstrated. This system is also used to operate the high energy proton accelerator in the Japan Proton Accelerator Research Complex (J-PARC). We here report on the EPICS-based remote control system developed for operating the decay muon beam line in J-PARC. Major functions of beam line devices, three bending magnets, eighteen quadrupole magnets, and four slits, are accessible via Ethernet from a graphical user interface composed of the Motif Editor and Display Manager (MEDM).

Journal Articles

J-PARC muon facility, MUSE

Miyake, Yasuhiro*; Shimomura, Koichiro*; Kawamura, Naritoshi*; Strasser, P.*; Makimura, Shunsuke*; Koda, Akihiro*; Fujimori, Hiroshi*; Nakahara, Kazutaka*; Takeshita, Soshi*; Kobayashi, Yasuo*; et al.

Journal of Physics; Conference Series, 225, p.012036_1 - 012036_7, 2010/06

 Times Cited Count:7 Percentile:91.45

Journal Articles

J-PARC decay muon channel construction status

Strasser, P.*; Shimomura, Koichiro*; Koda, Akihiro*; Kawamura, Naritoshi*; Fujimori, Hiroshi*; Makimura, Shunsuke*; Kobayashi, Yasuo*; Nakahara, Kazutaka*; Kato, Mineo*; Takeshita, Soshi*; et al.

Journal of Physics; Conference Series, 225, p.012050_1 - 012050_8, 2010/06

 Times Cited Count:11 Percentile:95.51

Journal Articles

Birth of an intense pulsed muon source, J-PARC MUSE

Miyake, Yasuhiro*; Shimomura, Koichiro*; Kawamura, Naritoshi*; Strasser, P.*; Makimura, Shunsuke*; Koda, Akihiro*; Fujimori, Hiroshi*; Nakahara, Kazutaka*; Kadono, Ryosuke*; Kato, Mineo*; et al.

Physica B; Condensed Matter, 404(5-7), p.957 - 961, 2009/04

 Times Cited Count:11 Percentile:47.73(Physics, Condensed Matter)

The muon science facility (MUSE) is one of the experimental areas of the J-PARC. The MUSE facility is located in the Materials and Life Science Facility (MLF), which is a building integrated to include both neutron and muon science programs. Construction of the MLF building was started at the beginning of 2004, and was recently completed at the end of the 2006 fiscal year. We have been working on the installation of the beamline components, expecting the first muon beam in the autumn of 2008.

Oral presentation

Effects of the exposure of extreme environments on the life-time and breeding ability of tardigrade ${it Ramazzottius varieornatus}$

Wadachi, Hiroki*; Kunieda, Takekazu*; Sakashita, Tetsuya; Kawai, Kiyoshi*; Iwata, Kenichi*; Nakahara, Yuichi*; Hamada, Nobuyuki*; Koseki, Shigenobu*; Yamamoto, Kazutaka*; Kobayashi, Yasuhiko; et al.

no journal, , 

We studied the effects of the exposure of extreme environments on life-time and breeding ability of tardigrade ${it R. varieornatus}$ to reveal the possibility of multi-cellular organism existences in the outerspace. A life time of animals is the shortest in the heavy-ion exposed animals than any other stressors. There were significant decrease in the number of egg-laying and hatching rate between irradiated and non-irradiated animals. However, we found the next generation in all experimental conditions. Our findings suggest that tardigrades exposed to even any extreme environments could have a descendant.

Oral presentation

The Tardigrade ${it Ramazzottius varieornatus}$; A Model for astrobiological studies

Horikawa, Daiki*; Kunieda, Takekazu*; Abe, Wataru*; Koshikawa, Shigeyuki*; Nakahara, Yuichi*; Watanabe, Masahiko*; Iwata, Kenichi*; Sakashita, Tetsuya; Hamada, Nobuyuki*; Higashi, Seigo*; et al.

no journal, , 

We report the first successful rearing of the herbivorous tardigrade, ${it Ramazzottius varieornatus}$, by supplying a green alga ${it Chlorella vulgaris}$ as a food. The reared individuals of this species had an anhydrobiotic capacity throughout their life cycle, from eggs, to juveniles, and to adults. Reared adults, while in an anhydrobiotic state, were tolerant to temperatures -196$$^{circ}$$C and 100$$^{circ}$$C. Furthermore, they were shown to be tolerant to the exposure to 99.8% acetonitrile, 1 GPa of hydrostatic pressure, or 5000 Gy of He ion radiation. We will report the details of these results, along with the description of their life history. Due to the observed tolerance to such extreme environmental conditions, we propose R. varieornatus to be included as a suitable model for astrobiological studies of multicellular organisms.

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