Technology of^3He Imaging with polarized^3He gas

2011 Fiscal Year Final Research Report

• Project/Area Number: 21340067
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kobe Tokiwa University
• Principal Investigator: TANAKA Masayoshi 神戸常盤大学, 保健科学部, 教授 (70071397)
• Co-Investigator(Kenkyū-buntansha): FUJIWARA Mamoru (00030031) ; KOHRI Hideki (40448022) ; TAKAMATSU Kunihiko (80392017)
• Project Period (FY): 2009 – 2011
• Keywords: 超偏極MRI / 強制偏極法 / 高速融解法

Research Abstract

We have developed a method to create the hyperpolarized, i. e., highly polarized^3He gas for the^3He-MRI using the Brute Force Method(BFM), where an extremely low temperature(～ 10mK), and a strong magnetic field(～ 17T) are employed. The reason why we use the BFM is that the production rate of the hyperpolarized^3He created by the well established laser optical pumping is limited to about 1 liter/day, while that for the BFM is expected to exceed 1000 liter/day.
Currently, we use the^3He/^4He cryogenic system(DRS2500) introduced from the Leiden Cryogenics, the Netherlands to realize a temperature lower than 10mK together with a Pomeranchuk cell, and the superconducting solenoidal coil to realize a strong magnetic field of 17T. We are almost ready to check the validity of the vaporization of the hyperpolarized solid^3He through a liquid phase without sizable spin relaxation by use of a method called a rapid melting method. We have started a preliminary experiment toward the production of the hyperpolarized^3He gas.

Research Products

• [Journal Article] Feasibility study on the nuclear spion imaging(NSI) (2012)
  • Author(s): M. Tanaka, T. Kunimatsu, M. Fujiwara, H. Kohri, T. Ohta, M. Utsuro, M. Yosoi, T. Akenaga, S. Imoto, K. Takamatsu, K. Ueda, J. P. Didelez, G. Frossati, and A. de Waard
  • Journal Title: Proceedings of Science(POS) Volume: (in press)
  • Peer Reviewed
• [Journal Article] Distillation of hydrogen isotopes for polarized HD targets (2012)
  • Author(s): T. Ohta, S. Bouchigny, J. P. Didelez, M. Fujiwara, K. Fukuda, H. Kohri, T. Kunimatsu, C. Morisaki, S. Ono, eda, G. Rouille, M. Tanaka, K. Ueda, M. Uraki, M. Utsuro, S. Y. Wang, M. Yosoi
  • Journal Title: Nucl. Instr. Meth Volume: A664 Pages: 347-352
  • Peer Reviewed
• [Journal Article] Production of polarized^3He gas by means of very low temperature and high magnetic field (2012)
  • Author(s): M. Tanaka, T. Inomata, Y. Takahashi, M. Fujiwara, M. Yosoi, H. Kohri, T. Ohta, C. Morisaki, and T. Kunimatsu
  • Journal Title: Bulletin of Kobe Tokiwa University Pages: 42-47
  • URL: http://bulletin.kobe-tokiwa.ac.jp/_userdata/ktu_kiyou01_05.pdf
  • Peer Reviewed
• [Journal Article] HD gas analysis with gas chromatography and quadrupole mass spectrometer (2011)
  • Author(s): T. Ohta, S. Bouchigny, J. P. Didelez, M. Fujiwara, K. Fukuda, H. Kohri, T. Kunimatsu, C. Morisaki, S. Ono, G. Rouille, M. Tanaka, K. Ueda, M. Uraki, M. Utsuro, S. Y. Wang, M. Yosoi
  • Journal Title: Nucl. Instr. Meth Volume: A640 Pages: 241-246
  • Peer Reviewed
• [Journal Article] Development of portable NMR system for polarized HD target (2011)
  • Author(s): T. Ohta, M. Fujiwara, K. Fukuda, H. Kohri, T. Kunimatsu, C. Morisaki, S. Ono, M. Tanaka, K. Ueda, M. Uraki, M. Utsuro, S. Y. Wang, and M. Yosoi
  • Journal Title: Nucl. Instr. Meth Volume: A633 Pages: 46-50
  • Peer Reviewed
• [Journal Article] Nuclear spin imaging with hyperpolarized nuclei created by brute force method (2011)
  • Author(s): M. Tanaka, T. Kunimatsu, M. Fujiwara, H. Utsuro, M. Yosoi, S. Ono, K. Fukuda, K. Takamatsu, K. Ueda, J. P. Didelez, G. Frossati, and A. de Waard
  • Journal Title: Physics Conference Series Volume: 295 Pages: 1-5
  • Peer Reviewed
• [Journal Article] Brute-force polarized solid H^3e and possible application to the production of polarized gas for medical. use (2011)
  • Author(s): M. Tanaka, T. Akenaga, K. Takamatsu, K. Ueda, T. Kunimatsu, M. Fujiwara, H. Kohri, T. Ohta, M. Utsuro, K. Fukuda, J. P. Didelez, G. Frossati, and A. de Waard
  • Journal Title: Proceedings of PSTP2011 Pages: 146-149
• [Journal Article] Polarized HD target for future Leps Experiments at Spring-8 in Japan (2010)
  • Author(s): H. Kohri, M. Fujiwara, M. Fukuda, T. Hotta, T. Kunimatsu, C. Morisaki, T. Ohta, S. Ono, K. Ueda, M. Uraki, M. Utsuro, M. Yosoi, S. Y. Wang, S. Bouchigny, J. P. Didelez, G. Rouille, and M. Tanaka
  • Journal Title: Int. J. Modern Phys. E(IJMPEA) Pages: 903-914
• [Presentation] 核スピンイメージング(NSI)法開発の現状 (2011)
  • Author(s): 田中正義
  • Organizer: 第2回総合スピン科学シンポジュウム
  • Place of Presentation: 山形大学理学部
  • Year and Date: 20111015-16
• [Presentation] Nuclear spin imaging with hyperpolarized nuclei created by brute forece method (2011)
  • Author(s): 田中正義
  • Organizer: The 7^<th> Workshop on Particle Correlations and Femtoscopy(WPCF2011)
  • Place of Presentation: 東京大学小柴記念館
  • Year and Date: 20110920-24
• [Presentation] Polarized solid^3He target created by the brute force method for medical use (2011)
  • Author(s): 田中正義
  • Organizer: 14^<th> International Workshop on Polarized Sources, Targets & Polarimetry
  • Place of Presentation: ロシア、サンクトペテルブルグ
  • Year and Date: 20110912-16
• [Presentation] Development of polarized HD target for LEPS experiment (2011)
  • Author(s): 郡英輝
  • Organizer: 14^<th> International Workshop on Polarized Sources, Targets & Polarimetry
  • Place of Presentation: ロシア、サンクトペテルブルグ
  • Year and Date: 20110912-16
• [Presentation] Polarized solid^3He target created by the brute force method for medical use (2010)
  • Author(s): 田中正義
  • Organizer: The 19^<th> International Spin Physics Symposium(SPIN20100)
  • Place of Presentation: Institute for Nuclear Physics(IKP),ドイツ
  • Year and Date: 20100927-1002
• [Presentation] MRIを用いた核スピンイメージング法のための高偏極^3Heガス生成 (2010)
  • Author(s): 國松貴之
  • Organizer: 日本物理学会
  • Place of Presentation: 岡山大学
  • Year and Date: 20100000
• [Presentation] MRIを用いた核スピンイメージング法のための高偏極^3Heガス生成II (2010)
  • Author(s): 國松貴之
  • Organizer: 日本物理学会
  • Place of Presentation: 九州工業大学
  • Year and Date: 20100000
• [Remarks]
  • URL: http://www.rcnp.osaka-u.ac.jp/～tanaka