Estimation of total fusion reactivity and contribution from supra-thermal tail using 3-parameter Dagum ion speed distribution. (November 2016)

• Record Type: Journal Article
• Authors: Majumdar, Rudrodip; Das, Debraj
• Is Part Of: Annals of nuclear energy. Volume 97(2016:Nov.)
• Page Start: 66
• Page End: 75
• Publication Date: 2016-11
• Subjects: Fusion reactivity -- Suprathermal tail contribution -- Dagum speed distribution -- Three-parameter Dagum distribution -- Fusion plasma -- Regression surface; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2016.06.027
• Languages: English
• ISSNs: 0306-4549

Abstract

Abstract: Thermonuclear fusion reactivity is a pivotal quantity in the studies pertaining to fusion energy production, fusion ignition and energy break-even analysis in both inertially and magnetically confined systems. Although nuclear fusion reactivity and thereafter the power density of a magnetic confinement fusion reactor and the fulfillment of the ignition criterion are quantitatively determined by assuming the ion speed distribution to be Maxwellian, a significant population of suprathermal ions, with energy greater than the quasi-Maxwellian background plasma temperature, is generated by the fusion reactions and auxiliary heating in the fusion devices. In the current work 3-parameter Dagum speed distribution has been introduced to include the effect of suprathermal ion population in the calculation of total fusion reactivity. The extent of enhancement in the fusion reactivity, at different back-ground temperatures of the fusion fuel plasma, due to the suprathermal ion population has also been discussed.