Most promising approaches as of 2020:
Why Private Billions Are Flowing Into Fusion by Bloomberg (2022)
Source. - Joint European Torus
- General Fusion: compress with liquid metal. Intends to demo in JET site.
- Helion Energy: direct fusion to electricity conversion without steam, direct from magnetic field movements
- First Light: shoot microscopic objct at a target to crush it so much that fusion happens
Once again, relies on superconductivity to reach insane magnetic fields. Superconductivity is just so important.
Ciro Santilli saw a good presentation about it once circa 2020, it seems that the main difficulty of the time was turbulence messing things up. They have some nice simulations with cross section pictures e.g. at: www.eurekalert.org/news-releases/937941.
Articles by others on the same topic
Fusion power is a form of energy generation that harnesses the energy produced by nuclear fusion, the process that powers stars, including the sun. In nuclear fusion, light atomic nuclei combine to form a heavier nucleus, releasing a significant amount of energy in the process. The most common fusion reaction that researchers focus on involves isotopes of hydrogen: deuterium and tritium.