Novel inferences of ionisation and recombination for particle/power balance during detached discharges using deuterium Balmer line spectroscopy
| Autor: | A. Fil, Bruce Lipschultz, B. P. Duval, D. S. Gahle, Christopher N. Bowman, M. Wensing, Kevin Verhaegh |
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| Předmět: |
Tokamak
synthetic spectroscopy (solps) Monte Carlo method FOS: Physical sciences divertor detachment 01 natural sciences balmer spectra interpretation impurities 010305 fluids & plasmas law.invention symbols.namesake Alcator C-Mod law Physics::Plasma Physics Ionization 0103 physical sciences emission alcator c-mod volume recombination 010306 general physics QC plasma Line (formation) Physics Divertor Balmer series probabilistic analysis Condensed Matter Physics simulation Charged particle Physics - Plasma Physics Computational physics Plasma Physics (physics.plasm-ph) radiation transport Nuclear Energy and Engineering Physics - Data Analysis Statistics and Probability symbols divertor ionisation and recombination divertor spectroscopy hydrogen molecules physics Data Analysis Statistics and Probability (physics.data-an) |
| Zdroj: | Plasma Physics and Controlled Fusion |
| ISSN: | 0741-3335 0029-5515 0032-1028 |
| Popis: | The physics of divertor detachment is determined by divertor power, particle and momentum balance. This work provides a novel analysis technique of the Balmer line series to obtain a full particle/power balance measurement of the divertor. This supplies new information to understand what controls the divertor target ion flux during detachment. Atomic deuterium excitation emission is separated from recombination quantitatively using Balmer series line ratios. This enables analysing those two components individually, providing ionisation/recombination source/sinks and hydrogenic power loss measurements. Probabilistic Monte Carlo techniques were employed to obtain full error propagation - eventually resulting in probability density functions for each output variable. Both local and overall particle and power balance in the divertor are then obtained. These techniques and their assumptions have been verified by comparing the analysed synthetic diagnostic 'measurements' obtained from SOLPS simulation results for the same discharge. Power/particle balance measurements have been obtained during attached and detached conditions on the TCV tokamak. The analysis results of this paper were formerly in arXiv:1810.04969 |
| Databáze: | OpenAIRE |
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