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An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV

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Chinese Physics C 2016年第11期40卷 67-74页

作者：何庆华 H.Fujimura H.Fukasawa R.Hashimoto y.Honda T.Ishikawa T.Iwata S.Kaida J.Kasagi A.Kawano S.Kuwasaki K.Maeda S.Masumoto M.Miyabe F.Miyahara K.Mochizuki N.Muramatsu A.Nakamura K.Nawa S.Ogushi y.Okada y.Onodera K.Ozawa y.sakamoto M.Sato H.Shimizu H.Sugai K.Suzuki y.Tajima S.Takahashi y.Taniguchi y.Tsuchikawa H.yamazaki R.yamazaki H.y.yoshida Research Center for Electron Photon Science Tohoku University Institute of Fluid Physics China Academy of Engineering Physics Department of Physics Wakayama Medical University Department of Physics Yamagata University Department of Information Science Tohoku Gakuin University Department of Physics Tohoku University Department of Physics University of Tokyo Accelerator Laboratory KEK Institute of Particle and Nuclear Studies KEK Wakasa-wan Energy Research Center

We have developed an event mixing technique to observe Bose-Einstein correlations （BEC） between two identical neutral pions produced in photo-induced reactions in the non-perturbative QCD energy region. It is found that the missing-mass consistency cut and the pion-energy cut are essential for the event mixing method to effectively extract BEC observables. A Monte Carlo （MC） simulation is used to validate these constraints and confirms the efficiency of this method. Our work paves the way for similar BEC studies at lower energies where the multiplicity of emitted bosons is limited.

关键词： Bose-Einstein correlations photoproduction event mixing

Present Status of NIRS ECR Ion Sources

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Chinese Physics C 2007年第S1期31卷 60-62页

作者： M.Muramatsu A.Kitagawa y.Iwata K.yamamoto H.Ogawa S.Hojo y.sakamoto T.Honma W.Takasugi M.Wakaisami y.yoshida T.Kubo y.Kato S.Biri A.G.Drentje Graduate school of Engineering Toyo UniversityJapan National Institute of Radiological Sciences4-9-1 AnagawaInageChiba 263-8555Japan National Institute of Radiological Sciences 4-9-1 AnagawaInageChiba 263-8555Japan Accelerator Engineering Corporation Ltd.2-13-I KonakadaiInageChiba 263-0043Japan Department of Mechanical Engineering Toyo University2100 KujiraiKawagoeSaitarna 350-0815Japan Osaka University 2-1 Yamada-okaSuitaOsaka 565-0871Japan Institute of Nuclear Research (ATOMKI) H-4026 DebrecenBen ter 18/cHungary National Institute of Radiological Sciences 4-9-1 AnagawaInageChiba 263-8555Japan K.V.I.University of GroningenZernikelaan 259747AA GroningenNetherlands

Four ECR ion sources have been operated in National Institute of Radiological Sciences(NIRS). Two ECR ion sources supply various ion species for the Heavy Ion Medical Accelerator in Chiba(HIMAC). The 10GHz NIRS-ECR ion source mainly produces C^(2+) ions for the heavy-ion *** of Si,Ar,Fe,Kr and Xe are usually produced by the 18GHz NIRS-HEC ion source for physical and biological *** other two compact ECR ion sources with all permanent magnet configuration have been developed for the new generation carbon therapy *** of these,the Kei-source,is a prototype which has been installed to the NIRS-930 cyclotron for axial *** other source,Kei2-source,is a demonstration source and utilized for the new generation *** addition,both Kei sources have been used to study fundamental properties. In this paper,present status of the ion sources and recent developments are reported.

关键词： heavy ion therapy ECR

PREPARATION OF IODINE-INCLUDED CARBON USING RF PLASMA CVD

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 423-426页

作者： y. sakamoto M. Takaya T. Uchiyama Department of Precision Engineering Faculty of Engineering Chiba Institute of Technology Tsudanuma Narashino Chiba 275-0016 JapanDepartment of Precision Engineering Faculty of Engineering Chiba Institute of Technology Tsudanuma Narashino Chiba 275-0016 JapanGraduate School Department of Precision Engineering Faculty of Engineering Ch iba Institute of Technology Tsudanuma Narashino Chiba 275-0016 Japan

For the aim of synthesis of the carbon-iodine compound, the preparation of iodin e-included carbon using RF plasma CVD was studied. Iodine-included carbon was sy nthesized on Si substrate using ICP type RF plasma CVD apparatus. C2H5OH and I2 dissolved C2H5OH was used as reactant gases. As a result, surface morphologies o f Iodine included carbon films showed flat surfaces for each samples. On the str ucture of films estimated by Raman spectroscopy, amorphous carbon was recognized . And I2 peaks were observed in XPS spectra. As a result of friction test, frict ion coefficient of the sample growth with C2H5OH showed about 0.45. On the other hand, that of the sample with I2-C2H5OH showed about 0.3 and decrease of fricti on coefficient was recognized. Iodine inclusion for carbon materials can be achi eved by RF plasma CVD using an I2-C2H5OH reactant. The coefficient of iodine-inc luded carbon showed lower than of without iodine

关键词： carbon iodine plasma CVD tribological property

Essentials of Proteolytic Machineries in Chloroplasts

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Molecular Plant 2017年第1期10卷 4-19页

作者： Kenji Nishimura yusuke Kato Wataru sakamoto Institute of Plant Science and Resources Okayama University 2-20-1 Chuo Kurashiki Okayama 710-0046 Japan

Plastids are unique organelles that can alter their structure and function in response to environmental and developmental stimuli. Chloroplasts are one type of plastid and are the sites for various metabolic pro- cesses, including photosynthesis. For optimal photosynthetic activity, the chloroplast proteome must be properly shaped and maintained through regulated proteolysis and protein quality control mechanisms. Enzymatic functions and activities are conferred by protein maturation processes involving consecutive proteolytic reactions. Protein abundances are optimized by the balanced protein synthesis and degrada- tion, which is depending on the metabolic status. Malfunctioning proteins are promptly degraded. Twenty chloroplast proteolytic machineries have been characterized to date. Specifically, processing peptidases and energy-driven processive proteases are the major players in chloroplast proteome biogenesis, remod- eling, and maintenance. Recently identified putative proteases are potential regulators of photosynthetic functions. Here we provide an updated, comprehensive overview of chloroplast protein degradation ma- chineries and discuss their importance for photosynthesis. Wherever possible, we also provide structural insights into chloroplast proteases that implement regulated proteolysis of substrate proteins/peptides.

关键词： chloroplast biogenesis protease protein homeostasis

采用增强的中间层改进高功率发动机用铝-硅-锡多层轴瓦

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汽车与新动力 1996年第2期 45-52页

作者： Sato y Mizuno y.sakamoto M 王耀清

最近高功率车用发动机的紧凑和轻型结构的趋势已迫使对轴瓦的疲劳强度、抗咬合性和顺应性提出了更高的要求。为了满足这些要求,作者分析了铝-硅-锡多层轴瓦的每层性能,并研究了其对轴瓦性能的影响。根据研究结果,对轴承合金和中间粘接... 详细信息

最近高功率车用发动机的紧凑和轻型结构的趋势已迫使对轴瓦的疲劳强度、抗咬合性和顺应性提出了更高的要求。为了满足这些要求,作者分析了铝-硅-锡多层轴瓦的每层性能,并研究了其对轴瓦性能的影响。根据研究结果,对轴承合金和中间粘接层作了改进。因而,这种新改进的轴瓦能提供比传统轴瓦更高的疲劳强度。这样就有可能使它成为当前用于苛刻条件下的发动机的一种轴瓦。

关键词：汽车发动机滑动轴承

Phenomenological aspects of possible vacua of a neutrino flavor model

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Chinese Physics C 2018年第2期42卷 27-37页

作者： Takuya Morozumi Hideaki Okane Hiroki sakamoto yusuke Shimizu Kenta Takagi Hiroyuki Umeeda Graduate School of Science Hiroshima University Core of Research for the Energetic Universe Hiroshima University Graduate School of Science and Engineering Shimane University

We discuss a supersymmetric model with discrete flavor symmetry A4×Z3. The additional scalar fields which contribute masses of leptons in the yukawa terms are introduced in this model. We analyze their scalar potential and find that they have various vacuum structures. We show the relations among 24 different vacua and classify them into two types. We derive expressions of the lepton mixing angles, Dirac CP violating phase and Majorana phases for the two types. The model parameters which are allowed by the experimental data of the lepton mixing angles are different for each type. We also study the constraints on the model parameters which are related to Majorana phases. The different allowed regions of the model parameters for the two types are shown numerically for a given region of two combinations of the CP violating phases.

关键词： flavor symmetry non-Abelian discrete group neutrino flavor model

Refueling for Steady-State Plasma by Repetitive Pellet Injection in Large Helical Device

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Plasma Science and Technology 2004年第3期6卷 2275-2280页

作者： H.yamada R.sakamoto I.Viniar M.Goto K.Kikuchi A.Lukin S.Masuzaki J.Miyazawa S.Morita y.Oda S.Sudo K.Tanaka National Institute for Fusion Science Toki Japan PELIN Laboratory Ltd. Moscow Russia Mitsubishi Heavy Industries Ltd. Kobe Japan

A repetitive pellet injector has been developed for investigation ofrefueling issues towards the steady-state operation in Large Helical Device (LHD). Continuousoperation of more than 10000 pellet launching at 10 Hz has been demonstrated. The maximum repeatingrate is 11 Hz. No technical constraint for longer operation has been found. The reliability ofpellet launch has exceeded 99.9%. The initial application to the NBI-heated plasmas has beensuccessful in the last experimental campaign of LHD. Although the pulse length is limited by theoperational constraint of NBI, the plasma with a density of 8 X 10^(19) m^(-3) has been sustainedfor 2 s by the pellet injection at 10 Hz. A prospect for the future experiment is discussed on thebasis of the initial result.

关键词： cryo-cooler screw extruder solid hydrogen

Plasma Confinement Characteristics in Heliotron J——Spontaneous Change of Plasma Confinement State

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Plasma Science and Technology 2004年第4期6卷 2371-2376页

作者： T.Mizuuchi H.Okada K.Nagasaki S.Kobayashi S.yamamoto F.Sano K.Kondo K.Hanatani M.Nakasuga y.Nakamura y.Suzuki y.Manabe H.Shidara H.Kawazome M.Kaneko y.Nishioka y.Ohno T.Takamiya H.yukimoto y.Fukagawa y.Morita S.Nakazawa S.Nishio K.Takahashi S.Tuboi M.yamada K.Ohashi y.Ijiri T.Senju K.yaguchi K.sakamoto K.Tohshi M.Shibano T.Obiki Institute of Advanced Energy Kyoto UniversityUji 611-0011Japan Graduate School of Energy Science Kyoto UniversityUji 611-0011Japan

Spontaneous transition of the plasma confinement mode was observed in thehelical-axis heliotron device 'Heliotron J' for three different plasma heating schemes, ***-only, NBI-only and the combination of ECH and NBI. The transition seems to occur above a certaincritical density. In addition to the confinement transition, a spontaneous shift of the hittingposition of the divertor plasma flux on the wall was observed. This shift could be related with thechange of the edge field topology caused by non-inductive toroidal currents.

关键词： heliotron J plasma confinement transition phenomena

Pellet Injectors Developed at the Pelin Laboratory for Steady-State Plasma Fuelling

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Plasma Science and Technology 2004年第3期6卷 2286-2290页

作者： I.Vinyar A.Geraud H.yamada R.sakamoto y.Oda A.Lukin A.Umov S.Skoblikov G.Gros G.Saksaganskii P.Reznichenko I.Krasilnikov V.Panchenko PELIN Laboratory Ltd. 2 Admiral Makarov St. Moscow 125212 Russia Association Euratom-CEA Departement de Recherches sur la Fusion Controllee CEA/Cadarache 13108 St Paul Lez Durance France National Institute for Fusion Science 322-6 Oroshi-cho Toki-shi 509-5292 Japan Mitsubishi Heavy Industries Ltd. 1-1 Wadasaki-cho 1-Chome Hyogo-ku Kobe-shi 652-8585 Japan D. V. Efremov Scientific Research Institute of Electrophysical Apparatus St. Petersburg 196641 Russia

Pneumatic and centrifugal injectors for steady-state plasma refuelling bysolid hydrogen, deuterium and tritium pellets have been designed at the PELIN Laboratory to meetrequirements of LHD, TORE SUPRA, and ITER. Prese... 详细信息

关键词： pellet plasma fuelling