Bellan, P. M. and You, S. and Yun, G. S. (2006) Identification of the Sequence of Steps Intrinsic to Spheromak Formation. In: 16th IAEA Technical Meeting on Research using Small Fusion Devices AND XI Latin American Workshop on Plasma Physics, Mexico City, Mexico, 30 November - 9 December 2005. American Institute of Physics Conference Proceddings (875). American Institute of Physics , Melville, NY, pp. 47-52. ISBN 978-0-7354-0375-8 http://resolver.caltech.edu/CaltechAUTHORS:BELaipcp06
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A planar coaxial electrostatic helicity source is used for studying the relaxation process intrinsic to spheromak formation Experimental observations reveal that spheromak formation involves: (1) breakdown and creation of a number of distinct, arched, filamentary, plasma-filled flux loops that span from cathode to anode gas nozzles, (2) merging of these loops to form a central column, (3) jet-like expansion of the central column, (4) kink instability of the central column, (5) conversion of toroidal flux to poloidal flux by the kink instability. Steps 1 and 3 indicate that spheromak formation involves an MHD pumping of plasma from the gas nozzles into the magnetic flux tube linking the nozzles. In order to measure this pumping, the gas puffing system has been modified to permit simultaneous injection of different gas species into the two ends of the flux tube linking the wall. Gated CCD cameras with narrow-band optical filters are used to track the pumped flows.
|Item Type:||Book Section|
|Additional Information:||©2006 American Institute of Physics [This work was] supported by the United States Department of Energy.|
|Subject Keywords:||plasma confinement; kink instability; plasma magnetohydrodynamics|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||18 Dec 2006|
|Last Modified:||26 Dec 2012 09:24|
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