Experimental studies on ion acceleration and stream line detachment in a diverging magnetic field

Kenichiro Terasaka, S. Yoshimura, K. Ogiwara, M. Aramaki, Masayoshi Tanaka

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The flow structure of ions in a diverging magnetic field has been experimentally studied in an electron cyclotron resonance plasma. The flow velocity field of ions has been measured with directional Langmuir probes calibrated with the laser induced fluorescence spectroscopy. For low ion-temperature plasmas, it is concluded that the ion acceleration due to the axial electric field is important compared with that of gas dynamic effect. It has also been found that the detachment of ion stream line from the magnetic field line takes place when the parameter fci LBVi becomes order unity, where fci, LB, and Vi are the ion cyclotron frequency, the characteristic scale length of magnetic field inhomogeneity, and the ion flow velocity, respectively. In the detachment region, a radial electric field is generated in the plasma and the ions move straight with the E×B rotation driven by the radial electric field.

Original languageEnglish
Article number072106
JournalPhysics of Plasmas
Volume17
Issue number7
DOIs
Publication statusPublished - Jul 1 2010

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detachment
magnetic fields
ions
electric fields
flow velocity
gas dynamics
cyclotron frequency
electrostatic probes
ion temperature
electron cyclotron resonance
laser induced fluorescence
unity
inhomogeneity
velocity distribution
spectroscopy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Experimental studies on ion acceleration and stream line detachment in a diverging magnetic field. / Terasaka, Kenichiro; Yoshimura, S.; Ogiwara, K.; Aramaki, M.; Tanaka, Masayoshi.

In: Physics of Plasmas, Vol. 17, No. 7, 072106, 01.07.2010.

Research output: Contribution to journalArticle

Terasaka, Kenichiro ; Yoshimura, S. ; Ogiwara, K. ; Aramaki, M. ; Tanaka, Masayoshi. / Experimental studies on ion acceleration and stream line detachment in a diverging magnetic field. In: Physics of Plasmas. 2010 ; Vol. 17, No. 7.
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