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Electron-emission-induced cooling of boundary region in fusion devices

Part of: Physics of Dusty Plasmas

Published online by Cambridge University Press:  01 August 2014

Sanjay K. Mishra ,
K. Avinash  and
Predhiman Kaw
Sanjay K. Mishra
Affiliation:
Institute for Plasma Research (IPR), Gandhinagar, Gujarat, India
K. Avinash*
Affiliation:
Department of Physics, Delhi University, New Delhi, India
Predhiman Kaw
Affiliation:
Institute for Plasma Research (IPR), Gandhinagar, Gujarat, India
*
†Email address for correspondence: ak0005@uah.edu
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Abstract

In this brief communication we have explored whether the electron emission from the boundary region surfaces (or from additional fine structured dust particles/droplets of some benign material put purposely in the area surrounding the surfaces) can act as an efficient cooling mechanism for boundary region surfaces/dust electrons and hence the lattice. In order to estimate the contribution of this cooling process a simple kinetic model based on charge flux balance and associated energetics has been established. Along with some additional sophistication like suitable choice of material and modification in the work function via surface coating, the estimates show that it is possible to keep the temperature of the plate/particles well within the critical limit, i.e. melting/sublimation point for the desired regime of incident heat flux.

Type
Research Article
Information
Journal of Plasma Physics , Volume 80 , Issue 6 , December 2014 , pp. 863 - 868
Copyright
Copyright © Cambridge University Press 2014 

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