Burn control of an ignited D-T tokamak by compression-decompression and fuel injection

The possibility of eliminating the thermal instability by applications of major radius compression-decompression and fueling rate regulation has been studied, with calculations based on non-linear simulation. The plasma density change during operation has been taken into account. It is difficult to suppress the thermal instability when either compression-decompression or fueling rate regulation is separately applied. But the plasma can be stabilized by simultaneous applications of these control methods even when the particle recycling is stopped. (author)