Abstract Details
Abstracts
Author: Yuzhi Li
Requested Type: Poster
Submitted: 2024-04-12 15:25:41
Co-authors: Yanzeng Zhang, Xianzhu Tang
Contact Info:
Los Alamos National Laboratory
3807 Gold St, Apt 8
Los Alamos, NM 87544
United States
Abstract Text:
The molecular activated recombination (MAR) plays a crucial
role in divertor detachment since the vibrationally excited hydrogen
molecules can create effective pathways for plasma recombination at
relatively higher temperatures (~2eV) than that for three-body
recombination. A vibrationally resolved molecular
collisional-radiative (CR) model is formulated to understand the
effect of molecules on plasma recombination at the target. As the
plasma parameters vary, the system loses its hyperbolicity and a
bifurcation of steady-state charge fraction at temperature ~2eV can
occur. This bifurcation stems from the complex chemical network
induced by the molecular reactions and allows the system to exhibit
bistability. The chemical reaction network theory is utilized to
explain how the complex molecular reaction network can generate
bistability. It can also be shown that the atomic CR system does not
allow multistability using the species-reaction graph (SR graph)
theory. The influence of the bistability phenomenon on plasma
recombination near the target is discussed.
Comments: