Study on the clarification of a Coulomb ordered state of ultralow-temperature ion beams and the formation of crystalline beams

• Project/Area Number: 26400299
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: National Institutes for Quantum and Radiological Science and Technology (2016); Japan Atomic Energy Agency (2014-2015)
• Principal Investigator: Yuri Yosuke 国立研究開発法人量子科学技術研究開発機構, 高崎量子応用研究所 放射線高度利用施設部, 主幹研究員 (90414565)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: ビーム冷却 / イオンビーム / レーザー冷却 / 秩序化 / クリスタルビーム / ラジオクロミックフィルム

Outline of Final Research Achievements

Characteristics of an ordered beam, which can be formed by applying strong laser cooling to ion beams circulating in a storage ring, were investigated using molecular dynamics simulations. Various dynamic behaviors were found such as the phase-space distribution and systematic oscillation of constituent ions in the ordered configuration, and their dependences on ring and beam conditions.
Moreover, the possibility of a simple profile measurement method using radiochromic films was considered toward measuring the cross-sectional structure of the ordered beam. It was found, through a microbeam irradiation experiment, that the radiochromic film has sufficiently a high spatial resolution of a few microns. The present result indicates that it is, in principle, possible to measure the cross-sectional structure of an ordered beam, which typically has a diameter of several hundred microns with inter-particle spacing of several ten microns.

Research Products

• [Journal Article] Characterization of a Gafchromic film for the two-dimensional profile measurement of low-energy heavy-ion beams (2016)
  • Author(s): Y. Yuri, K. Narumi, and T. Yuyama
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 828 Pages: 15-21
  • DOI: 10.1016/j.nima.2016.04.055
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Three-Dimensional Ordering of Cold Ion Beams in a Storage Ring: A Molecular-Dynamics Simulation Study (2015)
  • Author(s): Y. YURI
  • Journal Title: AIP Conference Proceedings Volume: 1668 Pages: 050005-050005
  • DOI: 10.1063/1.4923124
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] ULTRALOW EMITTANCE BEAM PRODUCTION BASED ON DOPPLER LASER COOLING AND COUPLING RESONANCE (2014)
  • Author(s): A. Noda, M. Nakao, H. Okamoto, K. Osaki, Y. Yuri, H. Souda, H. Tongu, K. Jimbo, M. Grieser, Z. He, and A. Smirnov
  • Journal Title: Proceedings of the 5th International Particle Accelerator Conference 2014 Volume: － Pages: 28-33
• [Presentation] ラジオクロミックフィルムを用いた微小荷電粒子ビーム形状の高分解能測定 (2017)
  • Author(s): 百合庸介, 佐藤隆博
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学（大阪府豊中市）
  • Year and Date: 2017-03-19
• [Presentation] ガフクロミックフィルムの低エネルギーイオンビーム強度分布計測への適用 (2016)
  • Author(s): 百合庸介, 鳴海一雅, 湯山貴裕
  • Organizer: 第13回日本加速器学会年会
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2016-08-09
• [Presentation] Use of a Gafchromic film HD-V2 for the Profile Measurement of Energetic Ion Beams (2016)
  • Author(s): Y. Yuri, T. Ishizaka, T. Agematsu, T. Yuyama, H. Seito, and S. Okumura
  • Organizer: 12th European Conference on Accelerators in Applied Research and Technology
  • Place of Presentation: Jyvaskyla (Finland)
  • Year and Date: 2016-07-05
  • Int'l Joint Research
• [Presentation] Transverse Intensity Distribution Measurement of Ion Beams Using Gafchromic Films (2016)
  • Author(s): Y. Yuri, T. Ishizaka, T. Yuyama, T. Agematsu, H. Seito, S. Okumura, and K. Narumi
  • Organizer: 7th International Particle Accelerator Conference
  • Place of Presentation: 釜山（韓国）
  • Year and Date: 2016-05-09
  • Int'l Joint Research
• [Presentation] レーザー冷却された重イオンビームの3次元秩序化に関する分子動力学シミュレーション (2016)
  • Author(s): 百合庸介
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大（宮城県仙台市）
  • Year and Date: 2016-03-19
• [Presentation] Three-dimensional Coulomb Ordering of a Highly Space-charge-dominated Ion Beam in a Storage Ring (2015)
  • Author(s): Y. YURI
  • Organizer: 6th International Particle Accelerator Conference, IPAC15
  • Place of Presentation: Richmond (USA)
  • Year and Date: 2015-05-03
• [Presentation] Three-dimensional ordering of cold ion beams in a storage ring: A molecular-dynamics simulation study (2014)
  • Author(s): Y. Yuri
  • Organizer: 11th International Workshop on Non-neutral Plasmas (NNP2014)
  • Place of Presentation: サンポート高松（香川県高松市）
  • Year and Date: 2014-12-01 – 2014-12-04