NDLI: Calculations of Wall-Material Washout by Plasma in MAGO Chamber

Content Provider	IEEE Xplore Digital Library
Author	Garanin, S.F. Mamyshev, V.I. Palagina, E.M.
Copyright Year	1973
Abstract	An issue important for the magnetic compression/magnetized target fusion (MAGO/MTF) approach is the impurity transport into plasma from the walls in the turbulent motion of the plasma, as the impurity-plasma radiation makes a significant contribution to cooling. For the axisymmetric magnetohydrodynamic flows in the azimuthal magnetic field that exist in the MAGO plasma, the appearing turbulence can be two-dimensional (2-D), as the magnetic field impedes the magnetic-field line bending. This paper estimates the adsorbed gas and copper washout from the walls by the moving plasma using one-dimensional (1-D) model equations of a turbulent impurity diffusion. The amount of desorbed gas impurities, which is composed of light elements (C, O), entered to plasma for 0.5-1 mus after the heated plasma generation is found to be insufficient to explain the X-ray diode signals in the experiment. However, a significant gas amount has been entered at later times, which agrees with the gas inflows obtained after shots in stationary facility experiments. It is found that, a given copper wall surface vaporization, the copper-impurity amount entered to plasma for 0.5-1 mus can in general explain the diode signals. Thus, the copper impurity entering can be an important or even determining effect influencing energy losses due to impurities in the chamber
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	2268
Ending Page	2272
Page Count	5
File Size	170901
File Format	PDF
ISSN	00933813
Volume Number	34
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Impurities Plasma transport processes Plasma x-ray sources Copper Magnetic fields Diodes Cooling Magnetohydrodynamics Two dimensional displays Impedance two-dimensional (2-D) turbulence turbulent diffusion (TD)
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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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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