Thermionic Cooling of the Target Plasma to a Sub-eV Temperature

Autor:	Campanell, M. D., Johnson, G. R.
Rok vydání:	2018
Předmět:	Physics - Plasma Physics
Zdroj:	Phys. Rev. Lett. 122, 015003 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.122.015003
Popis:	Contemporary models of bounded plasmas assume that the target plasma electron temperature far exceeds the temperature of the cold electrons emitted from the target, T_emit. We show that when the sheath facing a collisional plasma becomes inverted, the target plasma electron temperature has to equal T_emit even if the upstream plasma is hotter by orders of magnitude. This extreme cooling effect can alter the plasma properties and the heat transmission to thermionically emitting surfaces in many applications. It also opens a possibility of using thermionic divertor plates to induce detachment in tokamaks. Comment: 5 pages, 4 figures, accepted version, manuscript was revised/improved based on referee reports
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1809.10257 Zobrazit plný text záznamu View this record from Arxiv