量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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The one-dimensional ordering experiment of protons has been performed using the electron cooling at S-LSR. The first proton ordering has been successfully confirmed and the abrupt drop in the momentum spread has been observed at a proton number of 2000 with electron currents of 25 mA, 50 mA and 100 mA. The transition temperature of the proton ordering is 0.17 meV in the longitudinal direction. Below the transition, the longitudinal proton temperature is cooled down to 26 maicro eV, which is close to the longitudinal electron temperature. The results of the beam simulations using the molecular dynamics method also agree well with the experimental results.
電子ビーム冷却された陽子ビームのOrdering相転移
