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Co- and counter-helicity interaction between two adjacent laboratory prominences

Hansen, J. F. and Tripathi, S. K. P. and Bellan, P. M. (2004) Co- and counter-helicity interaction between two adjacent laboratory prominences. Physics of Plasmas, 11 (6). pp. 3177-3185. ISSN 1070-664X. http://resolver.caltech.edu/CaltechAUTHORS:HANpop04

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Abstract

The interaction between two side-by-side solar prominence-like plasmas has been studied using a four-electrode magnetized plasma source that can impose a wide variety of surface boundary conditions. When the source is arranged to create two prominences with the same helicity (co-helicity), it is observed that helicity transfer from one prominence to the other causes the receiving prominence to erupt sooner and faster than the transmitting prominence. When the source is arranged to create two prominences with opposite helicity (counter-helicity), it is observed that upon merging, prominences wrap around each other to form closely spaced, writhing turns of plasma. This is followed by appearance of a distinct bright region in the middle and order of magnitude higher emission of soft x rays. The four-electrode device has also been used to change the angle of the neutral line and so form more pronounced S-shapes.


Item Type:Article
Additional Information:©2004 American Institute of Physics. Received 21 October 2003; accepted 3 March 2004; published online 11 May 2004. The authors wish to thank F. C. Cosso, D. Felt, and L. Begay for their technical assistance. Work supported by U.S. DOE Grant No. DE-FG03-98ER54461. Much of the work described here is from the doctoral dissertation of one of the authors (J.F.H.).
Subject Keywords:plasma interactions; astrophysical plasma; plasma diagnostics; solar prominences
Record Number:CaltechAUTHORS:HANpop04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:HANpop04
Alternative URL:http://dx.doi.org/10.1063/1.1724831
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3125
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 May 2006
Last Modified:26 Dec 2012 08:52

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