- Lawson criterion is derived with the assumption of equilibrium plasma, which doesn't hold true in any real tokomak/stellarator
- at required temperatures most of the energy would be in photons of thermal radiation, that don't get confined by magnetic field, so when plasma relaxes from high energy beams to thermal equilibrium, it loses all the pumped energy through radiation
- with high energy beams tokomak is essentially a particle accelerator, where electrons get in the way of collision
- Lawson criterion is derived with the assumption of equilibrium plasma, which doesn't hold true in any real tokomak/stellarator
- at required temperatures most of the energy would be in photons of thermal radiation, that don't get confined by magnetic field, so when plasma relaxes from high energy beams to thermal equilibrium, it loses all the pumped energy through radiation
- with high energy beams tokomak is essentially a particle accelerator, where electrons get in the way of collision