The multiple coils superconducting maget is uaually quench protected by bypass diodes. The heat spreading model is mentioned on textbook for coil to coil quench spreading. But the heat spreading is not fast enough for magnet quench protection. Because the theoretical quench protection should be "fast" spreading for all coils. (With initial quench in one coil only.) So I need the bypass quench heater to accelerate the quench process. Is it true? I think the current decay causes the quench spreading from coil to coil through mutual inductance or self-induced voltage. This type of quench spreading is faster than heat spreading model. If the theory above is correct? If it's true, how can I evaluate it through simulation? I cannot find any information about field changing quench on superconducting coil. Thank you very much!