A study on the formation method of toroidal antimatter plasmas

2013 Fiscal Year Final Research Report

• Project/Area Number: 23654201
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: The University of Tokyo
• Principal Investigator: SAITOH Haruhiko 東京大学, 新領域創成科学研究科, 客員共同研究員 (60415164)
• Co-Investigator(Renkei-kenkyūsha): YOSHIDA Zensho 東京大学, 新領域創成科学研究科, 教授 (80182765) ; MOHRI Akihiro 京都大学, 人間・環境学研究科, 名誉教授 (10025926) ; YAMAZAKI Yasunori 理化学研究所, 山崎原子物理研究室, 上席研究員 (30114903)
• Project Period (FY): 2011 – 2013
• Keywords: 非中性プラズマ / 反物質プラズマ / ダイポール磁場

Research Abstract

Aiming for the creation of toroidal antimatter plasmas, the dynamics of positrons in a dipole magnetic field was numerically and experimentally investigated. High energy positrons supplied from a radioactive source have chaotic long orbit lengths in the dipole field, which can be applied to an efficient injection method of positrons into a confinement region. A proof-of-principle experiment was conducted by using a small Na-22 source and a gamma-ray coincidence measurement system in RT-1.

Research Products

• [Journal Article] Recent status of A Positron-Electron Experiment (APEX), Journal of Physics (2014)
  • Author(s): H. Saitoh, T. S. Pedersen, U. Hergenhahn, E. V. Stenson, N. Paschkowski, and C. Hugenschmidt
  • Journal Title: Conference Series Volume: 505 Pages: 012045 1-4
  • DOI: 10.1088/1742-6596/505/1/012045
  • Peer Reviewed
• [Journal Article] Stable confinement of electron plasma and initial results on positron injection in RT-1 (2013)
  • Author(s): H.Saitoh, Z.Yoshida, J. Morikawa, Y. Yano, N. Kasaoka, W. Sakamoto, and T. Nogami
  • Journal Title: Non-Neutral Plasma Physics VII Volume: 1521 Pages: 63-72
  • DOI: 10.1063/1.4796062
  • Peer Reviewed
• [Presentation] Trapping properties of magnetic dipole fields (2013)
  • Author(s): H. Saitoh, T. S. Pedersen, U. Hergenhahn, E. V. Stenson, N. Paschkowski, and C. Hugenschmidt
  • Organizer: Physics of Electron-Positron Plasma Workshop
  • Place of Presentation: Max Planck Institute for Plasma Physics, Greifswald, Germany
  • Year and Date: 2013-10-11
• [Presentation] Recent status of A Positron-Electron Experiment (APEX) (2013)
  • Author(s): H. Saitoh, T. S. Pedersen, U. Hergenhahn, E. V. Stenson, N. Paschkowski, and C. Hugenschmidt
  • Organizer: 13th International Workshop on Slow Positron Beam Techniques and Applications
  • Place of Presentation: Technical University Munich, Germany
  • Year and Date: 2013-09-20
• [Presentation] Confinement of a toroidal non-neutral plasma in magnetic dipole (2012)
  • Author(s): H.Saitoh, Z.Yoshida, J. Morikawa, Y. Yano, N. Kasaoka, and W. Sakamoto
  • Organizer: 10th international workshop on non-neutral plasmas
  • Place of Presentation: Greifswald, Germany
  • Year and Date: 2012-08-28
  • Invited
• [Presentation] Spontaneous formation of peaked density profile in a dipole plasma (2012)
  • Author(s): H.Saitoh, Z.Yoshida, J. Morikawa, Y. Yano, N. Kasaoka, and W. Sakamoto
  • Organizer: 2nd Asian Pacific Transport Working Group Meeting
  • Place of Presentation: Chengdu, China
  • Year and Date: 2012-05-15
• [Presentation] 磁気圏型装置における陽電子閉じ込め実験の初期結果 (2012)
  • Author(s): 齋藤晴彦, 吉田善章, 矢野善久, 森川惇二, 三上季範, 笠岡紀和
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大, 兵庫
  • Year and Date: 2012-03-24
• [Presentation] Initial results on positron confinement in a magnetospheric configuration (2011)
  • Author(s): H.Saitoh, Z.Yoshida, J. Morikawa, and Y. Yano
  • Organizer: 53rd annual meeting of the APS, Division of plasma physics
  • Place of Presentation: Salt Lake City, USA
  • Year and Date: 2011-11-17
• [Presentation] 磁気圏型装置における陽電子群の空間分布と閉じ込め特性 (2011)
  • Author(s): 齋藤晴彦, 吉田善章, 矢野善久, 森川惇二, 坂本渉, 笠岡紀和
  • Organizer: 日本物理学会 2012年秋季大会
  • Place of Presentation: 横浜大, 神奈川
  • Year and Date: 2011-09-20