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Title: Predicting disruptive instabilities in controlled fusion plasmas through deep learning

Journal Article · · Nature (London)
 [1];  [2];  [3]
  1. Harvard Univ., Cambridge, MA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Princeton Univ., NJ (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)

Nuclear fusion power via magnetic confinement tokamak reactors carries the promise of sustainable and clean energy production for the future [1]. The avoidance of large-scale plasma instabilities called disruptions [2, 3] is one of the most pressing challenges [4, 5] towards this goal. Disruptions are particularly deleterious for large reactors such as the multi-billion dollar international ITER project [6] currently under construction, whose reaction for the first time aims to produce more power from fusion than is injected to heat the plasma. Here, we present a new approach to forecast disruptions based on deep learning that for the first time overcomes the crucial limitations of past work, such as first-principles based [5] and classical machine learning approaches [7, 8, 9, 10, 11]. In particular, our method for the first time (i) delivers reliable predictions on machines other than the one it was trained on — a crucial requirement for large future reactors that cannot afford “training” disruptions; (ii) utilizes high-dimensional training data such as profiles to add new physics information and boost predictive performance; and (iii) engages supercomputing at the largest scale to deliver solutions with improved accuracy and speed. Trained on experimental data from the largest tokamaks in the US (DIII-D [12]) and the world (JET [13]), our method moreover can be tuned for physics-specific tasks such as prediction with long warning times, and opens up possible avenues for moving forward the goal from passive disruption prediction to active reactor control and optimization. These results illustrate the potential for deep learning to accelerate progress in fusion energy science and in the understanding and prediction of complex systems in the physical sciences in general.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); General Atomics, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
FG02-97ER25308; FC02-04ER54698
OSTI ID:
1507546
Alternate ID(s):
OSTI ID: 1566845
Journal Information:
Nature (London), Vol. 568, Issue 7753; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 133 works
Citation information provided by
Web of Science

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Cited By (13)

Machine learning control for disruption and tearing mode avoidance journal February 2020
Progress in disruption prevention for ITER journal June 2019
A machine learning approach based on generative topographic mapping for disruption prevention and avoidance at JET journal August 2019
Disruptive plasma simulations in EAST including 3D effects journal September 2019
Deep neural network Grad–Shafranov solver constrained with measured magnetic signals journal December 2019
A linear equation based on signal increments to predict disruptive behaviours and the time to disruption on JET journal December 2019
Machine learning and big scientific data
  • Hey, Tony; Butler, Keith; Jackson, Sam
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 378, Issue 2166 https://doi.org/10.1098/rsta.2019.0054
journal January 2020
“Zhores” — Petaflops supercomputer for data-driven modeling, machine learning and artificial intelligence installed in Skolkovo Institute of Science and Technology journal October 2019
Deep learning based surrogate models for first-principles global simulations of fusion plasmas journal November 2021
Deep convolutional neural networks for multi-scale time-series classification and application to disruption prediction in fusion devices text January 2019
Offline Contextual Bayesian Optimization for Nuclear Fusion preprint January 2020
Using LSTM for the Prediction of Disruption in ADITYA Tokamak text January 2020
On the Universal Transformation of Data-Driven Models to Control Systems text January 2021