| 摘要 |
PURPOSE:To heighten the safety of the device by providing an operation part for evaluating quenching probability and selecting a control method having a small risk of quenching by means of measured data of temperature, electric current and a magnetic field of a superconducting coil. CONSTITUTION:The position and shape of plasma 1 is controlled with a superconducting coil 2. Measured data Tj, Hj, Jj transmitted from coil temperature, electric current and magnetic field meters 16, 17, 18 are sent to a plasma position and shape operation part 3 and a quenching probability operation part 4. An control error deltai between plasma a position-shape and its aimed value is calculated from the operation part 3. Quenching probability Pj is calculated from temperature Tj, a magnetic field Hj and electric current Jj in the operation part 4. The probability Pj and the error deltai are considered, and a control method with a small risk of quenching is selected from an evaluation function of a control system to determine a voltage command value of the coil 2. The voltage Vj is applied to the coil 2 by the use of a power source 6 on the basis of its command value and the plasma position and shape are controlled. |
