A 150kV/300A/1/spl mu/s coaxial Blumlein pulser

Blumlein pulsers are well-suited devices for high voltage pulse generation in the range of /spl mu/s. They consist of pieces of transmission lines charged in parallel, which discharge synchronously in series into the matched load by using a single switch. The main problems with this type of circuit are the presence of the shield cable impedance that contributes to the power loss of the device and the requirement of tong lengths of lines for operation in the microsecond range. In view of that, this paper presents a construction method that minimizes these losses and reduces the generator size by using coaxial lines coiled up on insulating tubes. In particular we report the construction of a 150kV/300A/1 /spl mu/s Blumlein pulser that has been carried out in our laboratory. Also the output voltage pulse measured up to 45 kV for the initial tests is given and compared with numerical simulation.