Spherical tokamak
Also written spherical torus, ST
A tokamak squeezed towards a cored-apple shape. The tighter aspect ratio holds plasma pressure with less magnetic field, which is efficient, but leaves very little room at the centre for the central column.
In the record: 3 companies, 2 laboratories and programmes, 29 devices and 0 reactor designs.
Not yet in the record for this approach: reactor designs.
Related approaches
Broader: Tokamak
Companies 3
Laboratories and programmes 2
Devices 29
Operating devices first, then those being built or planned, then those shut down, suspended or cancelled.
- ETE Operating National Institute for Space Research · BR · 5 measurements
- EXL-50U Operating ENN Science and Technology Development · CN
- GLAST-III Operating Pakistan Atomic Energy Commission · PK · 5 measurements
- GLOBUS-M2 Operating Ioffe Institute · RU · 7 measurements
- GUTTA Operating Saint Petersburg State University · RU · 4 measurements
- HIST Operating University of Hyogo · JP · 4 measurements
- KTM Operating Institute of Atomic Energy of National Nuclear Center of the Republic of Kazakhstan · KZ · 5 measurements
- LATE Operating Kyoto University · JP
- MAST-U Operating UK Atomic Energy Authority · GB · 5 measurements
- MEDUSA-CR Operating Instituto Tecnológico de Costa Rica · CR · 5 measurements
- MT-1 Operating Pakistan Atomic Energy Commission · PK · 5 measurements
- NORTH Operating Technical University of Denmark · DK · 2 measurements
- PEGASUS-III Operating University of Wisconsin-Madison · US · 4 measurements
- QUEST Operating Kyushu University · JP · 4 measurements
- SMART Operating University of Seville · ES · 5 measurements
- ST40 Operating Tokamak Energy · GB · 13 measurements
- SUNIST-1 Operating Tsinghua University · CN · 5 measurements
- TST-2 Operating The University of Tokyo · JP · 5 measurements
- UTST Operating The University of Tokyo · JP · 5 measurements
- VEST Operating Seoul National University · KR · 4 measurements
- MT-2 Under construction Pakistan Atomic Energy Commission · PK
- NSTX-U Under construction Princeton Plasma Physics Laboratory · US · 5 measurements
- SSST Under construction Institute for Plasma Research · IN · 4 measurements
- PST Planned Pakistan Atomic Energy Commission · PK · 4 measurements
- STEP Planned STEP · GB
- EXL-50 Shut down ENN Science and Technology Development · CN · 5 measurements
- MAST Shut down 4 measurements
- NSTX Shut down 4 measurements
- START Shut down 3 measurements
Measurements
25 devices using this approach carry 121 measurements: 108 claimed, 11 planned, 1 achieved, 1 superseded. The values, each with its status and source, are on the benchmark and on each device's page. Most measured: ST40 (13), GLOBUS-M2 (7), ETE (5), GLAST-III (5), KTM (5).
Guides
- Fusion approaches compared Every family of fusion machine, how each holds its fuel, the best result this dataset holds for it, its main unsolved problem and the organisations pursuing it.
- Commercial timeline of fusion power Six fusion power plants are on record, all still planned. The only dated electricity purchase is Helion's May 2023 deal to supply Microsoft from 2028.
Spherical tokamak in the glossary · Fusion overview · All approaches