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Title: Inverse rendering of fusion plasmas: inferring plasma composition from imaging systems
Abstract In this work, we develop a differentiable rendering pipeline for visualising plasma emission within tokamaks, and estimating the gradients of the emission and estimating other physical quantities. Unlike prior work, we are able to leverage arbitrary representations of plasma quantities and easily incorporate them into a non-linear optimisation framework. The efficiency of our method enables not only estimation of a physically plausible image of plasma, but also recovery of the neutral Deuterium distribution from imaging and midplane measurements alone. We demonstrate our method with three different levels of complexity showing first that a poloidal neutrals density distribution can be recovered from imaging alone, second that the distributions of neutral Deuterium, electron density and electron temperature can be recovered jointly, and finally, that this can be done in the presence of realistic imaging systems that incorporate sensor cropping and quantisation.  more » « less
Award ID(s):
1909028
PAR ID:
10645193
Author(s) / Creator(s):
; ; ; ;
Corporate Creator(s):
Publisher / Repository:
IOP
Date Published:
Journal Name:
Nuclear Fusion
Volume:
65
Issue:
2
ISSN:
0029-5515
Page Range / eLocation ID:
026020
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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