Development of thin polarized proton target for low-energy RI-beam experiments

• Project/Area Number: 25800155
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyushu University
• Principal Investigator: Sakaguchi Satoshi 九州大学, 理学研究院, 助教 (70569566)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 原子核(実験) / 原子核(理論) / 不安定核 / スピン偏極 / 弾性散乱 / 共鳴弾性散乱 / 偏極分解能 / 偏極標的 / 共鳴散乱

Outline of Final Research Achievements

To realize the study of unstable nuclei via low-energy reactions with spin-polarized proton, we developed a spin-polarized solid proton target which can be operated at high temperature and at low magnetic field. p-Terphenyl was used as target material because it is stable in the vacuum. A technique to make the target as thin as 100 um was developed by using slow sublimation of the material at high temperature. As an upgrade of the target, its size was enlarged from 14mm to 24mm in diameter. The target was polarized efficiently using a new laser with a wavelength of 556 nm. A test experiment of 9C-p resonant elastic scattering was carried out, where the property of low-lying states of 10N including its mass was unveiled. In addition, spin-asymmetry was measured for the 6He-p elastic scattering at an intermediate energy using the enlarged polarized proton target.

Research Products

• [Int'l Joint Research] 慶北大学(韓国)
• [Int'l Joint Research] IPN Orsay(フランス)
• [Int'l Joint Research] Oak Ridge National Laboratory(米国)
• [Int'l Joint Research] University of Hong Kong/Beihang University(中国)
• [Journal Article] Studies of Unstable Nuclei with Spin-Polarized Proton Target (2016)
  • Author(s): Satoshi Sakaguchi, Tomohiro Uesaka, Takashi Wakui, Sergey Chebotaryov, Tomomi Kawahara, Shoichiro Kawase, Evgeniy Milman, Tsz Leung Tang, Kenichiro Tateishi and Takashi Teranishi
  • Journal Title: Proceedings of International Symposium on Spin Physics (SPIN2014), International Journal of Modern Physics: Conference Series Volume: 40 Pages: 1660071-1660071
  • DOI: 10.1142/s2010194516600715
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Study of Three-Nucleon Force Effect via Few-Nucleon Scattering (2016)
  • Author(s): Y. Wada, K. Sekiguchi, U. Gebauer, J. Miyazaki, T. Taguchi, M. Dozono, H. Sakai, N. Sakamoto, M. Sasano, Y. Shimizu, H. Suzuki, T. Uesaka, S. Kawase, Y. Kubota, C. S. Lee, T. L. Tang, K. Yako, Y. Maeda, K. Miki, H. Okamura, S. Sakaguchi, T. Wakasa
  • Journal Title: International Journal of Modern Physics: Conference Series Volume: 40 Pages: 1660070-1660070
  • DOI: 10.1142/s2010194516600703
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Development of Neutron Polarization Measurement System for Studying NN interaction in Nuclear Medium (2016)
  • Author(s): J. Yasuda, T. Wakasa, M. Dozono, T. Fukunaga, S. Gotanda, K. Hatanaka, Y. Kanaya. Y. Maeda, Y. Maeda, K. Miki, Y. Nishio, T. Noro, K. Ohnaka, S. Sakaguchi, Y. Sakemi, K. Sekiguchi, A. Tamii, T. Taguchi and Y. Wada
  • Journal Title: Proceedings of International Symposium on Spin Physics (SPIN2014), International Journal of Modern Physics: Conference Series Volume: 40 Pages: 1660073-1660073
  • DOI: 10.1142/s2010194516600739
  • Peer Reviewed / Open Access
• [Journal Article] The Spin Studies in Few-Body Systems at Nuclotron (2016)
  • Author(s): V. P. Ladygin, I. Dobrin, V. V. Fimushkin, S. Sakaguchi et al.
  • Journal Title: Proceedings of International Symposium on Spin Physics (SPIN2014), International Journal of Modern Physics: Conference Series Volume: 40 Pages: 1660074-1660074
  • DOI: 10.1142/s2010194516600740
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Inverse kinematics (p,n) reaction studies using the WINDS slow neutron detector and the SAMURAI spectrometer (2016)
  • Author(s): J. Yasuda et al.,
  • Journal Title: Nucl. Instr. Meth. B Volume: 未定 Pages: 393-396
  • DOI: 10.1016/j.nimb.2016.02.007
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Dependence of spin-polarized proton target performance on microwave resonator thickness parameter and operation temperature (2016)
  • Author(s): S. Chebotaryov, S. Sakaguchi et al.
  • Journal Title: RIKEN Accel. Prog. Rep. Volume: 49 Pages: 174-174
  • Open Access / Int'l Joint Research
• [Journal Article] Production of low-energy 4.17 MeV/nucleon 9C beam with polyethylene degrader at RIPS (2016)
  • Author(s): E. Milman, T. Teranishi, S. Sakaguchi et al.
  • Journal Title: RIKEN Accel. Prog. Rep. Volume: 49 Pages: 160-160
  • Open Access / Int'l Joint Research
• [Journal Article] Development of the He-filling system for the SAMURAI spectrometer (2016)
  • Author(s): V. Panin, S. Chebotaryov, S. Sakaguchi et al.
  • Journal Title: RIKEN Accel. Prog. Rep. Volume: 49 Pages: 168-168
  • Open Access / Int'l Joint Research
• [Journal Article] Study of Gamow-Teller transitions from 132 Sn via the (p, n) reaction at 220 MeV/u in inverse kinematics (2016)
  • Author(s): M. Sasano, J. Yasuda, S. Sakaguchi, et al.
  • Journal Title: EPJ Web of Conferences Volume: 107 Pages: 06003-06003
  • DOI: 10.1051/epjconf/201610706003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Development of Polarized Proton Target for Low-Energy Experiments at RIKEN (2015)
  • Author(s): E. Milman, S. Sakaguchi, S. Chebotaryov, T. Kawahara, K. Tateishi, T. Teranishi and T. Uesaka
  • Journal Title: JPS Conference Proceedings Volume: 6
  • DOI: 10.7566/jpscp.6.030129
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Experimental Plan for Elastic Scattering of Polarized Protons from Neutron-Rich 6He Isotopes at 200 MeV/nucleon (2015)
  • Author(s): S. Chebotaryov, S. Sakaguchi, T. Kawahara, E. Milman, K. Tateishi and T. Uesaka
  • Journal Title: JPS Conference Proceedings Volume: 6
  • DOI: 10.7566/jpscp.6.030024
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Design of a thin-film polarized proton target system for low-energy RI beam experiments (2015)
  • Author(s): E. Milman, S. Sakaguchi et al.,
  • Journal Title: RIKEN Accel. Prog. Rep. 2014 Volume: 48 Pages: 24-24
  • Int'l Joint Research
• [Journal Article] Microwave system development of enlarged spin-polarized proton target for RI beam experiments (2015)
  • Author(s): S. Chebotaryov, S. Sakaguchi et al.,
  • Journal Title: RIKEN Accel. Prog. Rep. 2014 Volume: 48 Pages: 224-224
  • Int'l Joint Research
• [Journal Article] Kinetic Parameters of Photo-Excited Triplet State of Pentacene Determined by Dynamic Nuclear Polarization (2015)
  • Author(s): T. Kawahara, S. Sakaguchi, K. Tateishi, T. L. Tang, and T. Uesaka
  • Journal Title: Journal of the Physical Society of Japan Volume: 84 Issue: 4 Pages: 044005-044005
  • DOI: 10.7566/jpsj.84.044005
  • NAID: 40020425877
  • Peer Reviewed / Open Access
• [Journal Article] Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71 MeV/nucleon (2015)
  • Author(s): S. Sakaguchi et al.
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47 Pages: 15-15
• [Journal Article] Proton polarization in photo-excited aromatic molecule at room temperature enhanced by intense optical source and temperature control (2015)
  • Author(s): S. Sakaguchi et al.
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47 Pages: 190-190
• [Journal Article] β-NMR measurement of unstable nuclei with cross-polarization technique (2015)
  • Author(s): T. Kawahara, S. Sakaguchi et al.
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47 Pages: 188-188
• [Journal Article] Development of enlarged spin-polarized proton target for RI beam experiments (2015)
  • Author(s): S. Chebotaryov, S. Sakaguchi et al.
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47 Pages: 187-187
• [Journal Article] Design of experiment for search of 10N resonances with resonant scattering of 9C off polarized proton (2015)
  • Author(s): E. Milman, S. Sakaguchi et al.
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47 Pages: 24-24
• [Journal Article] Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71 MeV/nucleon (2014)
  • Author(s): S. Sakaguchi, T. Uesaka,N. Aoi,Y. Ichikawa,K. Itoh,M. Itoh,T. Kawabata,T. Kawahara,Y. Kondo,H. Kuboki,T. Nakamura,T. Nakao,Y. Nakayama,H. Sakai,Y. Sasamoto, K. Sekiguchi,T. Shimamura,Y. Shimizu,and T. Wakui
  • Journal Title: RIKEN Accelerator Progress Report Volume: 47
• [Journal Article] Proton polarization in photo-excited aromatic molecule at room temperature enhanced by intense optical source and temperature control (2014)
  • Author(s): S. Sakaguchi, T. Uesaka, T. Kawahara, T. Ogawa, L. Tang, T. Teranishi, Y. Urata, S. Wada, and T. Wakui
  • Journal Title: RIKEN Accelerator Progress Report Volume: 47
• [Journal Article] Proton polarization in photo-excited aromatic molecule at room temperature enhanced by intense optical source and temperature control (2013)
  • Author(s): S. Sakaguchi, T. Wakui, 他7名
  • Journal Title: Nucl. Instrum. And Methods B Volume: 317 Pages: 679-684
  • DOI: 10.1016/j.nimb.2013.07.067
  • Peer Reviewed
• [Presentation] Status of data analysis from experiment on p-6He elastic scattering at 200 MeV/nucleon (2017)
  • Author(s): S. Chebotaryov, S. Sakaguchi for SAMURAI13 Collaboration
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: Osaka University
• [Presentation] Search for 10N resonances with 9C+p resonant scattering (2016)
  • Author(s): E. Milman, T. Teranishi, S. Sakaguchi et al.
  • Organizer: JPS 71th Annual Meeting
  • Place of Presentation: Sendai, Miyagi, Japan
  • Year and Date: 2016-03-20
• [Presentation] Recent and future development of polarized proton target (2016)
  • Author(s): S. Sakaguchi
  • Organizer: Nuclear physics with Triplet-DNP technique and its application
  • Place of Presentation: Ito, Fukuoka, Japan
  • Year and Date: 2016-01-08
  • Int'l Joint Research
• [Presentation] Polarized proton target at SAMURAI: Elastic scattering of 6He from polarized proton (2016)
  • Author(s): S. Sakaguchi for SAMURAI13 Collaboration
  • Organizer: SAMURAI International Collaboration Workshop 2016
  • Place of Presentation: Kyushu University
  • Int'l Joint Research
• [Presentation] Experiment on elastic scattering of polarized protons from neutron-rich 6He isotopes at 200 MeV/nucleon (2016)
  • Author(s): S. Chebotaryov, S. Sakaguchi for SAMURAI13 Collaboration
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: Miyazaki University
• [Presentation] Search for low-lying resonances in 10N structure via 9C + p resonant scattering (2016)
  • Author(s): E. Milman, T. Teranishi, S. Sakaguchi for RRC27 Collaboration
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: Miyazaki University
• [Presentation] Elastic scattering of neutron-rich 6He nuclei from polarized protons at 200 A MeV (2016)
  • Author(s): S. Chebotaryov, S. Sakaguchi for SAMURAI13 Collaboration
  • Organizer: 22nd International Spin Symposium
  • Place of Presentation: University of Illinois (USA)
  • Int'l Joint Research
• [Presentation] Elastic scattering with spin-polarized proton target (2015)
  • Author(s): S. Sakaguchi
  • Organizer: 25th Anniversary of RIKEN-Projectile Fragment Separator (RIPS25)
  • Place of Presentation: Shonan Village Center, Kanagawa, Japan
  • Year and Date: 2015-12-06
  • Int'l Joint Research / Invited
• [Presentation] Studies of unstable nuclei with spin-polarized proton target (2014)
  • Author(s): S. Sakaguchi et al.
  • Organizer: The 21st International Symposium on Spin Physics (SPIN2014)
  • Place of Presentation: Beijing University
  • Year and Date: 2014-10-24
  • Invited
• [Presentation] Solid polarized proton target for radioactive ion beam experiments (2014)
  • Author(s): S. Sakaguchi et al.
  • Organizer: The Fourth Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and The Physical Society of Japan (Hawaii2014)
  • Place of Presentation: Hawaii, U.S.
  • Year and Date: 2014-10-11
• [Presentation] Spin-asymmetry measurement in proton resonant scattering from unstable nuclei (2014)
  • Author(s): S. Sakaguchi et al.
  • Organizer: 8th International Workshop on Direct Reactions with Exotic Beams (DREB2014)
  • Place of Presentation: Darmstadt, Germany
  • Year and Date: 2014-07-04
• [Presentation] Study of radioactive isotopes at low incident energy with solid polarized proton target (poster presentation) (2014)
  • Author(s): S. Sakaguchi et al.
  • Organizer: The 2nd Conference on Advances in Radioactive Isotope Science (ARIS2014)
  • Place of Presentation: University of Tokyo
  • Year and Date: 2014-06-01 – 2014-06-06
• [Presentation] 陽子弾性散乱のアイソスピン空間への拡張で探る中性子スキン厚と状態方程式 (2014)
  • Author(s): 坂口聡志
  • Organizer: 九大分野横断型研究会―クォーク・原子核・中性子星を俯瞰する―
  • Place of Presentation: 九州大学、福岡
• [Presentation] Study of Unstable Nuclei with Spin-polarized Protons (2014)
  • Author(s): S. Sakaguchi
  • Organizer: Nuclear Physics Seminar at Instutute for Basic Science
  • Place of Presentation: Daejeon, Korea
  • Invited
• [Presentation] Study of Unstable Nuclei with Spin-polarized Protons (2014)
  • Author(s): S. Sakaguchi
  • Organizer: Nuclear Physics Seminar at Kyungpook University
  • Place of Presentation: Daegue, Korea
  • Invited
• [Presentation] Preparation status of SAMURAI13 experiment (2013)
  • Author(s): S. Sakaguchi
  • Organizer: SAMURAI International Workshop
  • Place of Presentation: Tokyo Institute of Technology, Tokyo
• [Funded Workshop] SAMURAI International Collaboration Workshop 2016 (2016)
  • Place of Presentation: 九州大学 伊都キャンパス（福岡県福岡市）
  • Year and Date: 2016-09-05