A powerful machine learning technique to extract proton core, beam, and α-particle parameters from velocity distribution functions in space plasmasD. Vech, M. L. Stevens, K. W. Paulson, D. M. Malaspina, A. W. Case, K. G. Klein and J. C. KasperA&A, 650 (2021) A198DOI: https://doi.org/10.1051/0004-6361/202141063