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Title: Plasma flow in peripheral region of detached plasma in linear plasma device

A plasma flow structure is investigated using a Mach probe under detached plasma condition in a linear plasma device NAGDIS-II. A reverse flow along the magnetic field is observed in a steady-state at far-peripheral region of the plasma column in the upstream side from the recombination front. These experimental results indicate that plasma near the recombination front should strongly diffuse across the magnetic field, and it should be transported along the magnetic field in the reverse flow direction. Furthermore, bursty plasma density fluctuations associated with intermittent convective plasma transport are observed in the far-peripheral region of the plasma column in both upstream and downstream sides from the recombination front. Such a nondiffusive transport can contribute to the intermittent reverse plasma flow, and the experimental results indicate that intermittent transports are frequently produced near the recombination front.
Authors:
;  [1] ;  [2] ;  [3]
  1. Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603 (Japan)
  2. EcoTopia Science Institute, Nagoya University, Nagoya, Aichi 464-8603 (Japan)
  3. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22493820
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; FLUCTUATIONS; LANGMUIR PROBE; MAGNETIC FIELDS; PLASMA DENSITY; RECOMBINATION; STEADY-STATE CONDITIONS