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 new ion cooler ring, S-LSR has an electron cooler and a laser cooling system. The electron cooler for S-LSR was designed to maximize the effective cooling length in the limited drift space of the ring. The construction of S-LSR
was finished in September 2005. After the beam test of the ring, the commissioning of the electron cooling was started from November 2005. In the first day of the commissioning, the cooling of 7MeV proton beam was observed successfully. The maximum cooling force was 0.12 eV/m with the electron current of 56 mA.
In order to search the 1-dimensional ordering of the proton beam, the momentum spread was measured with reducing the particle number. The attainable lowest momentum spread of protons was 4x10-6 at 2000 protons after the improvement of the cathode power supply of the electron gun.
ELECTRON COOLING EXPERIMENTS AT ION STORAGE RING, S-LSR
