NDLI: A laboratory quiescent plasma device for modeling velocity shear in space

Content Provider	IEEE Xplore Digital Library
Author	Zintl, M.W. Koepke, M.E. Carroll III, J.J.
Copyright Year	1997
Description	Author affiliation: Dept. of Phys., West Virginia Univ., Morgantown, WV, USA (Zintl, M.W.)
Abstract	Summary form only given. A continuing topic of interest among the space physics community is the acceleration of low-altitude ionospheric ions and the underlying mechanisms. One such mechanism, which has gained much attention in the past few years, is ion acceleration due to turbulence generated by a velocity-shear layer transverse to the local magnetic field, in particular, in situations where magnetic-field-aligned currents may be too small to destabilize current-driven electrostatic ion-cyclotron modes. These situations are modeled in a plasma produced by the WVU Q-machine. The plasma is a collisionless, low-temperature (T/sub i//spl ap/T/sub e/=0.2 eV), low-neutral-density alkali metal, typically sodium or barium, confined by a uniform magnetic field (B=0.5-3.0 kG). The shear layer is created by a segmented-disk electrode placed at the end of the plasma column opposite to the source; the voltage drop across any two groups of segments creates a radially localized electric field, and thus an inhomogeneous azimuthal E/spl times/B plasma drift. A variety of space-relevant parameters can be adjusted, such as the ratio of gyroradius to inhomogeneity scale length (/spl rho//sub i//L), ion-electron temperature ratio (T/sub i//T/sub e/), ratio of ions to neutrals (to model different altitudes), and ratio of ion densities in the case of multi-ion-species plasma studies.
Starting Page	163
Ending Page	164
File Size	206850
Page Count	2
File Format	PDF
ISBN	0780339908
ISSN	07309244
DOI	10.1109/PLASMA.1997.604478
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laboratories Plasma devices Plasma confinement Plasma temperature Acceleration Magnetic fields Plasma accelerators Plasma sources Nonuniform electric fields Physics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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