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2012 Fiscal Year Final Research Report

Production and detection of rovibrationally cold molecular ions usinga cryogenic liear ion trap

Research Project

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Project/Area Number 23654144
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionSophia University

Principal Investigator

OKADA Kunihiro  上智大学, 理工学部, 准教授 (90311993)

Project Period (FY) 2011 – 2012
Keywordsイオントラップ / クーロン結晶 / 分子イオン
Research Abstract

We have developed a compact cryogenic linear ion trap to producerovibrationally cold molecular ions embeded in an ion Coulomb crystal. First, the compact cryogeniclinear ion trap with double radiation shields was newly developed and was connected to a 10 Kcryocooler. Then, we performed laser cooling experiments of trapped Ca+ions. We have successfullygenerated Ca+Coulomb crystals containing more than a few thousands ions under low-temperatureenvironments of about 50 K. We also succeeded in producing cold CaH+ions, which are generated bylaser-induced reactions between Ca+*(2P1/2) and H2 molecules. A few thousands of cold CaH+ions aremaintained over one hour under the low-temperature environments. The results imply that thepopulation of the rotational ground state (J = 0) of CaH+is increased to 13%, while the roomtemperature population is only 2%. It is noted that in this condition the sum of J = 0-3 populationreaches to 90% and the vibrational ground state is attained (the vibrational constant is about 0.18 eV).This is an important achievement to perform rovibrational spectroscopy of CaH+.

  • Research Products

    (18 results)

All 2013 2012 2011

All Journal Article (5 results) (of which Peer Reviewed: 2 results) Presentation (13 results)

  • [Journal Article] Cold ion-polar-molecule reactions studiedwith a combined Stark-velocity-filter-ion-trap apparatus2013

    • Author(s)
      K. Okada, T. Suganuma, T. Furukawa, T.Takayanagi, M. Wada, H. A. Schuessler
    • Journal Title

      Physical Review A87

      Volume: 043427 Pages: 14

    • Peer Reviewed
  • [Journal Article] Laser-induced reactions between a Ca^+ Coulomb crystal and polar molecules2012

    • Author(s)
      K. Okada, N. Kimura, T. Suganuma, K.Shiina, T. Furukawa, T. Takayanagi, M.Wada, and H. A. Schuessler
    • Journal Title

      Journal of Physics: Conference SeriesVolume

      Volume: 388 Pages: 6

    • DOI

      doi:10.1088/1742-6596/388/1/012025

    • Peer Reviewed
  • [Journal Article] Laser-induced reactions between a Ca^+ Coulomb crystal and ammonia molecules2012

    • Author(s)
      N. Kimura, K. Okada, H.A. Schuessler, M.Wada
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 45 Pages: 1

  • [Journal Article] Stark velocity filter for producing slowpolar molecules2011

    • Author(s)
      T. Suganuma, K. Okada, T.Takayanagi, S. Ohtani, H. A. Schuessler, M.Wada
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 44 Pages: 1

  • [Journal Article] Sympathetic crystallization of CaH^+ in alinear Paul trap2011

    • Author(s)
      N. Kimura, K. Okada, T.Takayanagi, S. Ohtani, H. A. Schuessler, M.Wada
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 44 Pages: 1

  • [Presentation] 低速極性分子と共同冷却分子イオンの反応速度測定II2013

    • Author(s)
      市川雅成, 古川貴浩, 和田道治, H. A.Schuessler, 岡田邦宏
    • Organizer
      日本物理学会 2013 年第68回年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      20130300
  • [Presentation] Study of cold ion chemistryusing ion traps2013

    • Author(s)
      K. Okada
    • Organizer
      One-day symposium onE-ring based molecular science
    • Place of Presentation
      TokyoMetropolitan University (TMU), Tokyo
    • Year and Date
      2013-02-07
  • [Presentation] Cold ion chemistry using the iontrap technique2012

    • Author(s)
      K. Okada
    • Organizer
      Workshop on InterstellarMatter (ISM2012)
    • Place of Presentation
      Hokkaido University, Japan
    • Year and Date
      20121017-19
  • [Presentation] Cold chemical reactions betweensympathetically cooled molecular ions andslow polar molecules2012

    • Author(s)
      K. Okada
    • Organizer
      19th InternationalMass Spectrometry Conference (IMSC2012)
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20120915-21
  • [Presentation] 低速極性分子と共同冷却分子イオンの反応速度測定2012

    • Author(s)
      Palaiseau, France, 23-27 July, 2012.(8) 古川貴浩, 市川雅成, 和田道治, H. A.Schuessler, 岡田邦宏
    • Organizer
      日本物理学会2012年第67回年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      20120900
  • [Presentation] Laser-induced reactions between a Ca^+ Coulomb crystal and polar molecules2012

    • Author(s)
      N. Kimura, K. Okada, K. Shiina, T.Suganuma, M. Wada, H. A. Schuessler
    • Place of Presentation
      Belfast, Northern Ireland,UK
    • Year and Date
      20120727-0802
  • [Presentation] A study of coldion-polar molecule reactions betweensympathetically cooled molecular ions andslow polar molecules2012

    • Author(s)
      K. Okada, T. Furukawa, M. Ichikawa, M.Wada, H. A. Schuessler
    • Organizer
      Mo-169, 23ndInternational Conference on Atomic Physics(ICAP2012)
    • Place of Presentation
      Ecolle Polytechnique,Palaiseau, France
    • Year and Date
      20120723-27
  • [Presentation] シュタルク分子速度フィルタ-を用いた極低温分子イオン-極性分子反応の研究2012

    • Author(s)
      古川貴浩,市川雅成,和田道治,H. A.Schuessler, 岡田邦宏
    • Organizer
      分子分光研究会
    • Place of Presentation
      上智大学
    • Year and Date
      2012-05-18
  • [Presentation] Ca^+ クーロン結晶と極性分子のレーザー誘起反応の測定2011

    • Author(s)
      木村直樹, 椎名皓一, 高柳俊暢, 和田道治 A, H.A.SchuesslerB, 岡田邦宏
    • Organizer
      日本物理学会 2011 年秋季大会
    • Place of Presentation
      富山大学
    • Year and Date
      20110900
  • [Presentation] シュタルク分子速度フィルターを用いた低速極性分子とCa+クーロン結晶の反応測定2011

    • Author(s)
      古川貴浩, 菅沼拓也, 岡田邦宏, 和田道治, H. A. Schuessler
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      富山大学
    • Year and Date
      20110900
  • [Presentation] Laser-induced reactions betweena Ca+Coulomb crystal and polar molecules2011

    • Author(s)
      K. Okada
    • Organizer
      Electronic and Atomic Collisions (ICPEAC2011)
    • Place of Presentation
      Belfast,Northern Ireland, UK
    • Year and Date
      20110727-0802
  • [Presentation] A Stark velocity filter for studying cold polarmolecule-molecular ion reactions2011

    • Author(s)
      T. Suganuma, K. Okada, N. Kimura, K.Shiina, M. Wada, H. A. Schuessler
    • Organizer
      Electronic and Atomic Collisions(ICPEAC 2011)
    • Place of Presentation
      Belfast, Northern Ireland, UK
    • Year and Date
      20110727-0802
  • [Presentation] Status and outlook: Sophia RFtrap and collisions involving coulombiccrystals2011

    • Author(s)
      K. Okada
    • Organizer
      4th International Workshop onElectrostatic Storage Devices (ESD 2011)
    • Place of Presentation
      Gatlinburg, Tennessee, USA
    • Year and Date
      20110608-11

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Published: 2014-09-25  

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