Effect of entropy on anomalous transport in ITG-modes of magneto-plasma. (10th March 2017)

• Record Type: Journal Article
• Authors: Yaqub Khan, M.; Qaiser Manzoor, M.; ul Haq, A.; Iqbal, J.
• Is Part Of: Nuclear fusion. Volume 57:Number 4(2017:Apr.)
• Publication Date: 2017-03-10
• Subjects: entropy distribution function -- entropy drift -- entropy principle -- anomalous transport -- ion temperature gradient mode; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/1741-4326/aa5e2f
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: The ideal gas equation and S = c v log ( P / ρ ) (where S is entropy, P is pressure and ρ is the mass density) define the interconnection of entropy with the temperature and density of plasma. Therefore, different phenomena relating to plasma and entropy need to be investigated. By employing the Braginskii transport equations for a nonuniform electron–ion magnetoplasma, two new parameters—the entropy distribution function and the entropy gradient drift—are defined, a new dispersion relation is obtained, and the dependence of anomalous transport on entropy is also proved. Some results, like monotonicity, the entropy principle and the second law of thermodynamics, are proved with a new definition of entropy. This work will open new horizons in fusion processes, not only by controlling entropy in tokamak plasmas—particularly in the pedestal regions of the H-mode and space plasmas—but also in engineering sciences.