ST
Fusion Approach
Experimental Results
| Publication | Density (m-3) | Temperature (keV) | Energy Confinement Time (s) | Triple Product (m-3 keV s) |
|---|---|---|---|---|
| Experiments on the ST Tok... | 6×1019(electron) | 0.8(electron) 0.4(ion) | 1×10-2 | 2.4×1017 |
Publications Describing Device
Princeton's Symmetrical Tokamak from Proposal to Plasma in 8 Months
Description
Symmetric Tokamak (ST) was the first tokamak in the US, designed and built at PPPL. The origin of the design of ST was the Model C stellarator. After results in T-3 revealed that heating was more successful in tokamaks than in early stellarators, the team at PPPL decided to change the stellarator configuration to a tokamak configuration. The transformation required changes in the vacuum vessel geometry, changing from racetrack to a circular configuration. The magnetic coils were designed to produce magnetic fields between 3.5 and 4.5 T. After 5 months of extensive transformation, the ST finally started operations on May 1st, 1970. The ST quickly achieved similar results to T-3, which led to the end of the stellarator era at that time. ST achieved electron temperatures of 2.2 keV.