Performance
Gain
20 figures in 4 of the 6 kinds of gain this dataset records. Each kind divides by something different, shown in the last column, so figures of different kinds are not comparable. How the kinds differ.
| Device | Form | Value | Status | Date | Divides by |
|---|---|---|---|---|---|
| National Ignition Facility | Target gain (Qtarget) | 4.13 | claimed | 2025-04-07 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 3.8 | claimed | 2026-06-20 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 2.44 | claimed | 2025-02-23 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 2.36 | claimed | 2024-02-12 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 1.89 | claimed | 2023-07-30 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 1.86 | claimed | 2024-11-18 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 1.74 | claimed | 2025-10-01 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 1.55 | claimed | 2023-10-30 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 1.5 | achieved | 2022-12-05 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Target gain (Qtarget) | 1.26 | claimed | 2023-10-08 | Laser energy delivered to the target, including hohlraum losses |
| JT-60U | Equivalent D-T gain (extrapolated)modelled | 0.8 | claimed | 2001 | External heating power coupled into the plasma |
| Joint European Torus | Plasma gain (Qplasma) | 0.63 | claimed | 1997-10-31 | External heating power coupled into the plasma |
| Joint European Torus | Plasma gain (Qplasma) | 0.37 | claimed | 2023-10-03 | External heating power coupled into the plasma |
| Joint European Torus | Plasma gain (Qplasma) | 0.33 | claimed | 2021-12-21 | External heating power coupled into the plasma |
| Tokamak Fusion Test Reactor | Plasma gain (Qplasma) | 0.28 | claimed | 1994-05-27 | External heating power coupled into the plasma |
| JT-60U | Equivalent D-T gain (extrapolated)modelled | 0.185 | claimed | 2001 | External heating power coupled into the plasma |
| OMEGA | Target gain (Qtarget) | 0.03 | claimed | 2022-04-14 | Laser energy delivered to the target, including hohlraum losses |
| National Ignition Facility | Wall-plug gain | 0.0078 | claimed | 2022-12-05 | Total facility grid energy drawn for the shot |
| ITER | Plasma gain (Qplasma) | 10 | planned | — | External heating power coupled into the plasma |
| SPARC | Plasma gain (Qplasma) | 2 | planned | — | External heating power coupled into the plasma |