Microparticle cloud imaging and tracking for data-driven plasma science
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- The Ohio State Univ., Columbus, OH (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Auburn Univ., AL (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
Oceans of image and particle track data encountered in plasma interactions with microparticle clouds motivate development and applications of machine-learning (ML) algorithms. A local-constant-velocity tracker, a Kohonen neural network or self-organizing map, the feature tracking kit, and U-Net are described and compared with each other for microparticle cloud datasets generated from exploding wires, dusty plasmas, and atmospheric plasmas. Particle density and the signal-to-noise ratio have been identified as two important factors that affect the tracking accuracy. Fast Fourier transform is used to reveal how U-Net, a deep convolutional neural network developed for non-plasma applications, achieves the improvements for noisy scenes. Viscous effects are revealed in the ballistic motions of the particles from the exploding wires and atmospheric plasmas. Subdiffusion of microparticles satisfying Δr2∝tk (k=0.84±0.02) is obtained from the dusty plasma datasets. Microparticle cloud imaging and tracking, when enhanced with data and ML models, present new possibilities for plasma physics.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- 89233218CNA000001; AC02-06CH11357; SC0018058
- OSTI ID:
- 1659207
- Alternate ID(s):
- OSTI ID: 1603191; OSTI ID: 1774503
- Report Number(s):
- LA-UR-19-30795; TRN: US2203406
- Journal Information:
- Physics of Plasmas, Vol. 27, Issue 3; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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