Editing Tokamak (section)

=== High Field Tokamaks ===
It has been known for a long time that stronger field magnets would enable high energy gain in a much smaller tokamak, with concepts such as [https://fire.pppl.gov/snowmass02.html FIRE, IGNITOR], and the [[Compact Ignition Tokamak|Compact Ignition Tokamak (CIT)]] being proposed decades ago.

The commercial availability of [[High-temperature superconductivity|high temperature superconductors (HTS)]] in the 2010s opened a promising pathway to building the higher field magnets required to achieve ITER-like levels of energy gain in a compact device. To leverage this new technology, the [[MIT Plasma Science and Fusion Center|MIT Plasma Science and Fusion Center (PSFC)]] and MIT spinout [[Commonwealth Fusion Systems|Commonwealth Fusion Systems (CFS)]] successfully built and tested the [https://news.mit.edu/2021/MIT-CFS-major-advance-toward-fusion-energy-0908 Toroidal Field Model Coil (TFMC)] in 2021 to demonstrate the necessary 20 Tesla magnetic field needed to build [[SPARC (tokamak)|SPARC]], a device designed to achieve a similar [[Fusion energy gain factor|fusion gain]] as ITER but with only ~1/40th ITER's plasma volume.

British startup [[Tokamak Energy]] is also planning on building a net-energy tokamak using HTS magnets, but with the spherical tokamak variant.

The joint EU/Japan JT-60SA reactor achieved first plasma on October 23, 2023, after a two-year delay caused by an electrical short.<ref>{{Cite web |date=2023-10-24 |title=Inauguration |url=https://www.jt60sa.org/wp/category/uncategorized/ |access-date=2024-01-01 |language=en-GB}}</ref><ref>{{Cite web |last=Szondy |first=David |date=2023-12-05 |title=World's largest tokamak fusion reactor powers up |url=https://newatlas.com/energy/worlds-largest-tokamak-fusion-reactor-powers-up/ |access-date=2024-01-01 |website=New Atlas |language=en-US}}</ref>