Realization of atomic hydrogen pair-ion plasma and verification of the collective properties

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03757
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Plasma science
• Research Institution: Yamaguchi University
• Principal Investigator: Oohara Wataru 山口大学, 大学院創成科学研究科, 教授 (80312601)
• Co-Investigator(Renkei-kenkyūsha): Yoshida Masafumi 山口大学, 大学院創成科学研究科, 助教 (80638825)
• Research Collaborator: Takeda Takashi ; Yokoyama Hiroyuki ; Anegawa Nobuki ; Kamikawa Toshimitsu ; Hayashi Tomonari ; Tatsumi Yusuke ; Egawa Masaki ; Takamori Satoru ; Watai Masami ; Morinaga Yuta ; Kobayashi Hiroaki ; Hiraoka Yuto 山口大学, 大学院創成科学研究科, 大学院生
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ペアイオンプラズマ / プラズマ・核融合 / 水素負イオン

Outline of Final Research Achievements

Positive hydrogen ions with two component energies were irradiated on an aluminum plasma grid to produce negative ions in the extraction apertures. The energy of passing ions was adjusted by the subsequent control grid and electrons were deflected and removed by a magnetic field applied. It became clear that negative ions are produced by negative ionization of low energy positive ions and collapse in local space. By adjusting the positive-ion acceleration voltage and the control-grid voltage, the ionic plasma consisting of only positive and negative ions was able to be realized without collapse of negative ions. Although the electrostatic waves were able to be excited, negative ions collapsed. The cause of collapse seemed to be the application of electric and magnetic fields, but the physical mechanism of collapse has not been elucidated.

Free Research Field

プラズマ理工学