Super Fast 75 ns LTD Stage

Abstract

In the report, we present the new super fast LTD prototype which delivers a 75 ns FWHM voltage pulse into a -0.5-0.6 Ohm matched load at -20 GW power. The stage is designed without of peaking capacitors, it includes 32 GA35436 (8 nF, 100 kV) storage capacitors, 16 spark gap switches and magnetic core with reduced thickness of the tape (50pm) to reduce the current losses. This stage prototype was specifically designed with an hemispherical vessel to operate with compressed gas (SF6, SF6/dry air mixtures, and pure dry air) up to 6 ata pressure, as well as with transformer oil. Test results of the stage prototype will be given and compared with numerical simulation.

Square pulse linear transformer driver

“…Each of the resistors R 1 ðtÞ and R 2 ðtÞ consist of two parts connected in series, one of them represents the constant resistance of the capacitors and the other the currentdependent resistance of the gas switches [9]. The model of Ref.…”

“…The model of Ref. [9] was used to simulate the brick switch resistance in order to separately take into account the influence of the different currents flowing in the standard and modified bricks.…”