共查询到20条相似文献,搜索用时 31 毫秒
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Kazuyoshi AkibaMarina Artuso Ryan BadmanAlessandra Borgia Richard BatesFlorian Bayer Martin van BeuzekomJan Buytaert Enric CabrujaMichael Campbell Paula Collins Raphael DumpsLars Eklund Daniel EsperanteCeleste Fleta Abraham GallasMiriam Gandelman Justin GarofoliMarco Gersabeck Vladimir V. Gligorov Hamish GordonErik H.M. Heijne Veerle HeijneDaniel Hynds Malcolm JohnAlexander Leflat Lourdes Ferre LlinXavi Llopart Manuel LozanoDzmitry Maneuski Thilo MichelMichelle Nicol Matt NeedhamChris Parkes Giulio PellegriniRichard Plackett Tuomas PoikelaEduardo Rodrigues Graeme StewartJianchun Wang Zhou Xing 《Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment》2012,661(1):31-49
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Takayuki Tomida Yusuke TsuyuguchiTakahito Arai Takuya BennoMichiyuki Chikawa Koji DouraMasaki Fukushima Kazunori HiyamaKen Honda Daisuke IkedaJohn N. Matthews Toru NakamuraDaisuke Oku Hiroyuki SagawaHisao Tokuno Yuichiro TamedaGordon B. Thomson Yoshiki TsunesadaShigeharu Udo Hisashi Ukai 《Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment》2011,654(1):653-660
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Ion-molecule reactions have been measured for methane-carbon tetrafluoride mixtures of different composition using a quadrupole mass spectrometer with a high-pressure ion source. Concentration of methane in these mixtures ranged from 10% to 90% (at 10% increment). Primary ions , , F+, CF+ and were produced by electrons with energy of 300 eV. Secondary ions , , , , and were observed as the result of ion-molecule reactions. Relative current intensities for primary and secondary ions are presented as a function of both total mixture pressure and concentration of methane in the mixture. Potential of repeller electrode inside the ion source collision chamber was fixed at 5 V for all measurements. Total mixture pressure was changed from 0.7 to 33.3 Pa. Schemes of ion-molecule reactions were proposed. 相似文献
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S.J. Asztalos G. CarosiC. Hagmann D. KinionK. van Bibber M. HotzL. J Rosenberg G. RybkaA. Wagner J. HoskinsC. Martin N.S. SullivanD.B. Tanner R. BradleyJohn Clarke 《Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment》2011,656(1):39-44
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