"Generator - gates" for mutual turn-on of thyristors connected in parallel

In high current circuits several thyristors have to be connected in parallel. At present some external means are used to secure that all the thyristors are turned on during a forward conduction period. We have investigated whether a current carrying thyristor can generate a trigger current which is sufficient to turn on a second thyristor exposed to the same anode voltage but still in the blocking state. This goal can be reached when the thyristors contain two differently optimized gates - a turn on gate and an extra generator gate.