Search Results 1-20 of 193

  • Status and Applications of a Tandetron AMS System at Nagoya University in 2019  [in Japanese]

    中村 俊夫 , 南 雅代 , 小田 寛貴 , 池田 晃子 , 山根 雅子 , 西田 真砂美 , 若杉 勇輝 , 佐藤 里名 , 澤田 陸 , 酢屋 徳啓 , 北川 浩之 , Nakamura Toshio , Minami Masayo , Oda Hirotaka , Ikeda Akiko , Yamane Masako , Nishida Masami , Wakasugi Yuki , Sato Rina , Sawada Hitoshi , Suya Noriyoshi , Kitagawa Hiroyuki

    … The problems of the AMS system in 2019/20 are; … (2) A differential pumping unit (a dry pump, MUP-015-2) in the ion source looked wrong, because attaining the high vacuum in the ion source after target exchange took more time than normal condition. … It took a shorter time but the attainable high vacuum level in the ion source was no big difference than before; …

    名古屋大学年代測定研究 (4), 63-71, 2020-06

    IR  DOI 

  • Dynamic vacuum behavior by the high-power beam in J-PARC 3 GeV synchrotron  [in Japanese]

    Kamiya Junichiro , Kotoku Hirofumi , Kurosawa Syunta , Takano Kazuhiro , Yanagibashi Toru , Yamamoto Kazami , Wada Kaoru

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    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2020(0), 200, 2020

    J-STAGE 

  • Ellipsometer Equipped with Multiple Mirrors for Element-selective Soft X-ray Experiments

    Araki Mihoko , Tono Kensuke , Yabashi Makina , Matsuda Iwao , Meikaku Junji , Kubota Yuya , Miyawaki Jun , Kosegawa Yuka , El Moussaoui Souliman , Bouillaud Thomas , Manset Paul , Owada Shigeki

    … <p>We developed the ellipsometer unit with a switchable mirror holder that can mount two mirrors and switch them without breaking vacuum. … The vacuum unit, combined with a differential pumping rotary flange, rotates smoothly with the help of two roll-stands, keeping the optical path stable during an experiment of ellipsometry. … The system allows one to efficiently make the measurement at two different photon energies of soft X-ray. …

    e-Journal of Surface Science and Nanotechnology 18(0), 231-234, 2020

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  • Kinetic analysis of reaction systems on mitochondrion surfaces  [in Japanese]

    Takeyasu Kotaro , Saito Ryuichi , Kujiraoka Ikuo , Nakamura Junji

    <p>ミトコンドリアは、内膜表面で酸素還元反応を起こし、生じたエネルギーを利用してエネルギーキャリアのATPを合成する。ミトコンドリア内物質の濃度変化をシミュレートするモデル計算は盛んに行われてきたが、表面の電気化学反応速度論に立脚した解析は未開拓である。ミトコンドリア内反応システムが、各種反応の活性化障壁やプロトンポンプなどに対して、どのようにエネルギーを利用しているか解析した結果を …

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2019(0), 3Da10, 2019

    J-STAGE 

  • Turbomolecular Pump as Main Pump in a High-power Proton Accelerator Vacuum System  [in Japanese]

    KAMIYA Junichiro , KINSHO Michikazu , OGIWARA Norio , SAKURAI Mitsuru , MABUCHI Takuya , WADA Kaoru

    … Challenges for achieving an ultrahigh vacuum (UHV) region in the beam line come from the large static and dynamic outgassing. … In the RCS vacuum system, turbomolecular pump was taken up as main pump because it can evacuate such continuous and additional outgassing with a large pumping speed in the wide pressure range. …

    Vacuum and Surface Science 62(8), 476-485, 2019

    J-STAGE 

  • Generation of Ultrahigh and Extreme-high Vacuum, and the Outgassing Mechanism  [in Japanese]

    FUJITA Daisuke

    … <p>The mechanism of gas release from the system in the process from ultrahigh vacuum to extreme-high vacuum was overviewed based on the basic evacuation model, quantitative outgassing measurement, and the examples using actual vacuum vessels. …

    Vacuum and Surface Science 61(9), 578-585, 2018

    J-STAGE 

  • Fabrication of Stackable Knudsen Pump Driven by Hot Water  [in Japanese]

    TAMURA Shota , SUGIMOTO Hiroshi

    … The feasibility of the pumping system driven by low-grade waste heats is also demonstrated.<br> …

    Journal of the Vacuum Society of Japan 60(12), 481-483, 2017

    J-STAGE 

  • Outgassing Properties of Aluminum Alloy with Surface Treatment —Performance Assessment of Developed Measurement System and Outgassing Rate Measurement—  [in Japanese]

    OGAWA Naoki , YOKOYAMA Koji , TERAOKA Hidenobu , ISHII Takashi , HARIMA Kanako , GOTO Moriyoshi , KITTAKA Ryouji

    …  We developed an outgassing measurement system which can measure by two methods “Switching Between Two Pumping Paths method” … As a result of calibrating the two vacuum gauges on the upstream side of the sample flow path and the blank flow path, we obtained the calibration factor of 9.33×10<sup>−1</sup> … As a result, the detection lower limit of the system was 5×10<sup>−12</sup> …

    Journal of the Vacuum Society of Japan 60(11), 450-456, 2017

    J-STAGE 

  • Vacuum Technologies in High-Power Proton Accelerators  [in Japanese]

    KAMIYA Junichiro

    …  For vacuum systems in high-power proton accelerators, compared with those in conventional particle accelerators, there are more challenging requirements in addition to their basic role owing to the existence of a large number of high-energy protons, rapid cycling of the magnetic field, and high radioactivation. …

    Journal of the Vacuum Society of Japan 59(8), 213-221, 2016

    J-STAGE 

  • Observations of the Gas Stream from the Large Helical Device for the Design of an Exhaust Detritiation System

    TANAKA Masahiro , SUZUKI Naoyuki , KATO Hiromi , KONDO Tomoki , the LHD Upgrade Team

    … From the viewpoints of tritium safety handling and public acceptance, any waste gas streams arising from the vacuum vessel of the LHD and Neutral Beam Injection (NBI) system will be treated by an exhaust detritiation system (EDS). … The rough pumping gas streams from the LHD and NBIs produced a high flow rate of 300 Nm<sup>3</sup>/h. …

    Plasma and Fusion Research 11(0), 2405055-2405055, 2016

    J-STAGE 

  • NEG Pumps for SuperKEKB New Beam Pipes  [in Japanese]

    SUETSUGU Yusuke , SHIBATA Kyo , ISHIBASHI Takuya , SHIRAI Mitsuru , TERUI Shinji

    … The construction of the new vacuum system for the SuperKEKB has been ongoing since 2010. … The target vacuum pressure in the main ring is on the order of 10<sup>−7</sup> … Therefore, the distributed pumping scheme is adopted to effectively evacuate the beam pipes. … A linear pumping speed of approximately 0.1 m<sup>3</sup> …

    Journal of the Vacuum Society of Japan 59(4), 100-104, 2016

    J-STAGE 

  • Performance of vacuum consolidation for reducing a long-term settlement

    Kosaka Toshiaki , Hayashi Hirochika , Kawaida Minoru , Teerachaikulpanich Nipon

    Vacuum consolidation method is commonly used to assist the embankment construction over the soft ground for the purpose of accelerating a consolidation process as well as increasing an overall stability of soft ground for a rapidly embankment construction. … Theoretically, the vacuum pressure is considered to be a surcharge load applying to the ground. … This load will be removed immediately after the termination of vacuum operation. …

    Japanese Geotechnical Society Special Publication 2(59), 2015-2020, 2016

    J-STAGE 

  • Status and Applications of a Tandetron AMS System at Nagoya University in 2014  [in Japanese]

    中村 俊夫 , 南 雅代 , 小田 寛貴 , 池田 晃子 , 箱崎 真隆 , 城森 由佳 , 太田 友子 , 西田 真砂美 , 池盛 文数 , 園田 圭佑 , 冨山 慎二 , 椋本 ひかり , Nakamura Toshio , Minami Masayo , Oda Hirotaka , Ikeda Akiko , Hakozaki Masataka , Jyomori Yuka , Ohta Tomoko , Nishida Masami , Ikemori Kazufumi , Kunita Keisuke , Tomiyama Shinji , Mukumoto Hikari

    … An AMS system (Model 4130-AMS) dedicated to 14C measurements, built by High Voltage Engineering Europe (HVEE), B.V., The Netherlands, was delivered to Nagoya University in 1996/97. … We briefly describe the maintenance processes and application results of the AMS system in 2014. …

    名古屋大学加速器質量分析計業績報告書 (26), 17-22, 2015-03

    IR  DOI 

  • Vacuum Technology for Japan Proton Accelerator Research Complex

    KAMIYA Junichiro

    … The requirements for the vacuum system is beyond the role of conventional vacuum systems. …

    Abstract of annual meeting of the Surface Science of Japan 35(0), 308, 2015

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  • Vacuum Systems  [in Japanese]

    TAKAHASHI Kazue

    …   An evacuation process from atmospheric pressure to an extremely low pressure involves four stages: removal of volume gas in a vacuum chamber, outgassing of gas adsorbed on the chamber surface, release of gas diffused to the surface from the inside of the chamber wall, and release of hydrogen gas permeated through the chamber wall. …

    Journal of the Vacuum Society of Japan 58(8), 292-298, 2015

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  • Outgassing Measurement for Vacuum Engineering  [in Japanese]

    INAYOSHI Sakae

    …   In this article, two common methods to evaluate the outgassing properties of vacuum system materials, thermal desorption spectroscopy (TDS) and the method of switching between two pumping paths (SPP), are discussed. …

    Journal of the Vacuum Society of Japan 58(2), 57-62, 2015

    J-STAGE 

  • Energy Saving in Paper Machine Vacuum System:-How to Utilize Modern Process and Variable Speed Drive Technology-  [in Japanese]

    Kikawada Shigeru , Uimonen Jyrki , Lahitnen Jussi

    ランテックシステムズ社(フィンランド)は,真空システムにおける従来の運転方法にこだわらず,新たな方法を採用することによって省エネが劇的に達成することが可能なケースがあることを提案する。それは,機械(ハード)自体のエネルギー効率の向上だけではなく,運転方法(ソフト)と融合することにある。<BR>製紙工場では,既存の装置を使って省エネ対策でハードとソフトの融合を試されたことがあるかもしれな …

    JAPAN TAPPI JOURNAL 68(5), 519-524, 2014

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  • Quick Pumping to Ultra High Vacuum without Baking and its Electric Power Saving Effect by Reduction of Water Vapor in Exposure Gas  [in Japanese]

    YAMAZAKI Ko , SHIKE Junichi , YAMAGATA Motoi , KATO Hiroyuki , KITANO Masahiro , KATO Shigeki

    …   The development of a quick pumping scheme into medium vacuum or ultra high vacuum (UHV) reduces not only the cost and the duration of pumping down, but it also reduce CO<sub>2</sub> … In this study, we aim for quick pumping into UHV without baking but with both introduction of well dried nitrogen gas into a chamber and improvement in the operation of the vacuum system. …

    Journal of the Vacuum Society of Japan 57(3), 96-101, 2014

    J-STAGE 

  • Outgassing Rate Measurement of the Plastics  [in Japanese]

    SATO Yoshihiro , TAKADA Satoshi , OMORI Takao , KIMURA Nobuhiro , SUZUKI Toshikazu , SAITO Yoshio

    … However, some of the plastomers are often installed in vacuum system, where their low electrical- and thermal-conductivity are required. … The rate of sheet, being after several tens hour pumping, shows rapid decrease. … The effect of bake-out degassing in vacuum is also examined for bulk plastomers.<br> …

    Journal of the Vacuum Society of Japan 56(10), 422-424, 2013-10-10

    J-STAGE  References (4)

  • Hydrophilization of Polyimide Film using Damage-Free Multi-Gas Plasma Jet  [in Japanese]

    MIYAHARA Hidekazu , SHIBATA Moe , OSHITA Takaya , TAKAMATSU Toshihiro , OKINO Akitoshi

    ポリイミドフィルムは電子機器の基板材料として昨今広く用いられるようになった.しかし,その表面は難親水性であるため,接着剤での貼合が容易ではなく,強固な接着力を得るためには親水化処理が必須である.その多くは化学的処理によるもの,もしくは真空プラズマを用いるものがほとんどであったが,本論文では,大気圧下で生成・照射が可能なダメージフリーマルチガスプラズマジェット発生源を開発し,これにより発生するアルゴ …

    KAGAKU KOGAKU RONBUNSHU 39(3), 372-377, 2013-07-20

    J-STAGE  References (15)

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