A response to a recent video by @Sabine Hossenfelder about gain in nuclear fusion research.

References
[1] “How close is nuclear fusion power?”, Sabine Hossenfelder
https://www.youtube.com/watch?v=LJ4W1g-6JiY
[2] J. Jacquinot and the JET team “Deuterium-tritium operation in magnetic confinement experiments: results and underlying physics”, Plasma Physics and Controlled Fusion 41, A13 (1999)
[3] P. Rodriguez-Fernandez et al., “Predictions of core plasma performance for the SPARC tokamak”, Journal of Plasma Physics 86, 865860503 (2020)
[4] G. Federici et al., “European DEMO design strategy and consequences for materials”, Nuclear Fusion 57, 092002 (2017)
[5] M. G. Bell et al., “Overview of DT Results from TFTR”, Nuclear Fusion 35, 1429 (1995)
[6] https://www.bloomberg.com/opin....ion/articles/2021-08
[7] https://www.ft.com/content/a8d....0a7e4-20e3-11ea-b8a1
[8] S. Moradi et al., “Global scaling of the heat transport in fusion plasmas”, Physical Review Research 2, 013027 (2020)
[9] An internal view of the Joint European Torus, EUROfusion
https://www.euro-fusion.org/me....dia-library/fusion-e
[10] C. C. Kuranz et al., “How high energy fluxes may affect Rayleigh-Taylor instability growth in young supernova remnants”, Nature Communications 9:1564 (2018)
[11] Adapted from: A. J. Webster, “Fusion: Power for the future”, Physics Education 38, 135 (2003)
[12] ITER Tokamak and Plant Systems (2016), Oak Ridge National Laboratory.
[13] The Joint European Torus (JET) magnetic fusion experiment in 1991, EFDA
[14] ITER project website
https://www.iter.org/mag/8/59
[15] https://lasers.llnl.gov/news/n....if-experiment-puts-r
[16] M. Nagel et al., “Cryogenic commissioning, cool down and first magnet operation of Wendelstein 7-X”, IOP Conference Series: Materials Science and Engineering 171, 012050 (2017)
[17] B.N. Sorbom et al., “ARC: A compact, high-field, fusion nuclear science facility”, Fusion Engineering and Design 100, 378 (2015)
[18] Commonwealth Fusion Systems website
https://cfs.energy/technology
[19] A flattened panorama of the outer wall of the Alcator C-Mod tokamak by Robert Mumgaard
https://commons.wikimedia.org/....wiki/File:Alcator_C-