This study focuses on the development of a high-power high frequency burst pulse generator with the sub-GHz order and several tens of megawatts. We are investigating the characteristics of cell death caused by pulsed electric field for the purpose of cancer treatment and sterilizing food products in a package, and the high frequency burst pulse is suitable for these purposes. The high-frequency electric field with the sub-GHz order can give stress inside cancer cells and induce apoptosis consequently. In the case of packaged foods, it is possible to sterilize them while they are still in their packaging because voltage can be applied inside the packaging.
However, our burst pulse generation circuits developed so far have suffered losses due to internal discharge caused by electric field concentration, which limited the output voltage. Therefore, to suppress the internal discharge, the circuit was sealed inside a pressure chamber and filled with insulating gas.
In this presentation, the operation of the burst pulse generation circuit when operated under the gas-filled conditions, was investigated. As a result, the voltage value was increased to approximately 1.6 times the previous value, to 15 kV, and the output power was increased to more than 20 MW, four times the previous amount.
 

pulse power,Sub-GHz,Burst Pulse