Voltage droop compensation based on resonant circuit for generalized high voltage solid-state Marx modulator

Abstract

Fig. 1. S 2 BM modulator with n stages for bipolar or unipolar pulse generation.Fig. 2. Tested HV topology of the n stages S 2 BM modulator, with auxiliary resonant based voltage droop compensation stage for bipolar or unipolar pulse generation, particular case of circuit of Fig. 1.Abstract-The purpose of this paper is to present and discuss the voltage droop compensation associated with long pulses generated by solid-state bipolar or unipolar high-voltage Marx modulators. In particular a novel design scheme for voltage droop compensation based on resonant circuit in solid-state bipolar (positive and/or negative pulses) high-voltage Marx generator, using off-the-shelf components, design and control, is described. The compensation consists in adding one auxiliary resonant stage to the existing Marx stages, without changing the modularity and topology of the circuit. The auxiliary compensation voltage is added to the output voltage to compensate the pulse voltage droop. Experimental results are presented for five stages Marx circuit, 10% voltage droop, using 1 kV pulse amplitude, 100 µs pulse width, 9.5 ms relaxation time and with 50 Hz pulse repetition rate.

Future circular collider injection and extraction kicker topologies and solid state generators

“…The magnitude of the sawtooth will depend upon the relative voltage on the two sets of capacitors and the number of cells in the Marx generator. Alternatively, for short pulse durations, resonant techniques can be applied for pulse voltage droop compensation [35].…”

Optimized solid-state bipolar Marx modulador with resonant type droop compensation

“…Considering this last point, in various conditions, the determined capacitance values may be too high for affordable designs of compact Marx modulators. For this reason, voltage droop compensation techniques must be considered [11][12][13].…”

Increasing the voltage droop compensation range in generalized bipolar solid-state Marx modulador

“…Several authors have presented different droop corrections [3,4] for unipolar Marx type circuits [5][6][7], based on auxiliary stages or "bouncer" circuits. In [8] a resonant type voltage droop compensation method has been developed for a solid-state bipolar Marx modulator. However, the proposed compensation method in [8] is a compromise between pulse repetition rate and resonant frequency.…”

“…In [8] a resonant type voltage droop compensation method has been developed for a solid-state bipolar Marx modulator. However, the proposed compensation method in [8] is a compromise between pulse repetition rate and resonant frequency. Another aspect is that the droop compensation percentage is inversely proportional with the number of Marx stages and limited by the power supply voltage.…”