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Abstract
A recent paper [L.N. Hau and W.Z. Fu, Phys. Plasmas 14, 110702 (2007)] deals with certain mathematical and physical properties of the kappa distribution. We comment on the authors' use of a form of distribution function that is different from the "standard" form of the kappa distribution, and hence their results, inter alia for an expansion of the distribution function and for the associated number density in an electrostatic potential, do not fully reflect the dependence on kappa that would be associated with the conventional kappa distribution. We note that their definition of the kappa distribution function is also different from a modified distribution based on the notion of nonextensive entropy.
Original language  English 

Article number  094701 
Number of pages  5 
Journal  Physics of Plasmas 
Volume  16 
Issue number  9 
Early online date  03 Sep 2009 
DOIs  
Publication status  Published  Sep 2009 
Bibliographical note
The work of N.S.S. and I.K. was supported by EPSRCUK Science and Innovation award to the Centre for Plasma Physics (QUB), CPP Grant No. EP/D06337X/1ASJC Scopus subject areas
 Condensed Matter Physics
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Projects
 1 Finished

R1740PLI: Queens University,Belfast Plasma Physics
Graham, B.
01/08/2005 → 31/05/2012
Project: Research