Author： Tokar M.Z. Koltunov M.
Publisher： IOP Publishing
ISSN： 0741-3335
Source： Plasma Physics and Controlled Fusion, Vol.55, Iss.4, 2013-04, pp. : 45013-45019
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Thermal instabilities, e.g. due to energy losses from impurities, can lead to a sudden drop in the local plasma temperature by orders of magnitude during a time in the micro-second range. A numerical modelling of the global plasma response to such localized phenomena is performed. An approach to calculate with a heat conduction, being a non-linear function both of the temperature and of its gradient, e.g. if the heat flux limit (HFL) is taken into account for plasmas of low collisionality, is developed. It is demonstrated that the deviation of the electron heat conduction from the Spitzer-Härm approximation due to the HFL is essential to explain experimental findings in tokamak experiments with massive gas injection performed to mitigate plasma disruptions.
Related content
Modelling the local and global cloud formation on HD 189733b
By Lee G. Helling Ch. Dobbs-Dixon I. Juncher D.
Astronomy & Astrophysics, Vol. 580, Iss. issue, 2015-07 ,pp. :
Access to resources
Recommend
By Kemaneci Efe Carbone Emile Jimenez-Diaz Manuel Graef Wouter Rahimi Sara Kroesen Gerrit Kemaneci Efe
Journal of Physics D: Applied Physics, Vol. 48, Iss. 43, 2015-11 ,pp. :
All optical local cooling and trapping in 3D
By Alge W. Ellinger K. Stecher H. Gheri K. M. Ritsch H.
EPL (EUROPHYSICS LETTERS), Vol. 39, Iss. 5, 2010-03 ,pp. :
The cooling of a gas of charged particles in a fully ionized plasma.
Journal de Physique et le Radium, Vol. 20, Iss. 5, 1959-05 ,pp. :