Fig 4 Under different Utcp2 (0.5kV, 1kV,
1.5kV), the PRF changes with the
Utcp1
When the main trigger voltage Utcp1≤0.3kV, PRF
performance significantly improves with the increasing of
Utcp2 (from 0.5kV to 1.5kV), while when the
Utcp1 ≥0.8kV, the Utcp2 has little
effect on the PRF. It can be seen that the lower Utcp2is, a higher Utcp1 is needed to improve the initial
plasma concentration. Conversely, when the Utcp2increase, the initial plasma concentration is large enough, and it will
just need a very small Utcp1 to pump the initial plasma
to the main gap. For example, under the Utcp2=1.5kV,
only 100V main trigger voltage allows the switch to operate stably at
400Hz. After testing and verification, the Utcp1 can
maintain the 400Hz PRF in the larger range of 0.1~5kV.
Conclusion: In this paper, the double-pulse triggering glow
discharge structure is used to realize the high PRF pseudospark, and the
test is carried out under different gas pressure, pre-trigger voltage
and main-trigger voltage respectively. The results shows the minimum
trigger voltage required to achieve stable trigger is about 100V,
according to the test results, the simulations, about under different
gas pressures, the influence of two trigger voltages on the current,
carried out. Finally, combined with the simulation and test results, the
influence of pre-trigger and main trigger voltage on the discharge
process is summarized respectively, that is, the initial plasma is
generated by pre-trigger voltage, and the main trigger pulse is
responsible for pumping plasma into the main gap.