JT-60
JT-60 (short for Japan Torus-60) is a large research tokamak, the flagship of the Japanese National Institute for Quantum Science and Technology's fusion energy directorate. As of 2023 the device is known as JT-60SA and is the largest operational superconducting tokamak in the world, built and operated jointly by the European Union and Japan in Naka, Ibaraki Prefecture. SA stands for super advanced tokamak, including a D-shaped plasma cross-section, superconducting coils, and active feedback control.
| Japan Torus-60 | |
|---|---|
| Device type | Tokamak |
| Location | Naka, Ibaraki Prefecture, Japan |
| Affiliation | Japan Atomic Energy Agency |
| Technical specifications | |
| Major radius | 3.4 m (11 ft) |
| Minor radius | 1.0 m (3 ft 3 in) |
| Plasma volume | 90 m3 |
| Magnetic field | 4 T (40,000 G) (toroidal) |
| Discharge duration | 65 s |
| History | |
| Year(s) of operation | 1985–2010 |
| Preceded by | JFT-2M |
| Succeeded by | JT-60SA |
| Related devices | TFTR |
| Links | |
| Website | www |
| Japan Torus-60 Super Advanced | |
|---|---|
| Device type | Tokamak |
| Location | Naka, Ibaraki Prefecture, Japan |
| Affiliation | QST + F4E |
| Technical specifications | |
| Discharge duration | 100 s |
| History | |
| Date(s) of construction | 2013 - 2020 |
| Year(s) of operation | 2023–present |
| Preceded by | JT-60U |
| Related devices | ITER |
| Links | |
| Website | www |
As of 2018, JT-60 holds the record for the highest value of the fusion triple product achieved: 1.77×1028 K·s·m−3 = 1.53×1021 keV·s·m−3. To date, JT-60 has the world record for the hottest ion temperature ever achieved (522 million °C); this record defeated the TFTR machine at Princeton in 1996.