Abstract
The possibility of deep parametric decay instability suppression by launching a complementary (small power) pump wave possessing a slightly shifted frequency is demonstrated experimentally. This suppression is achieved at an additional pump wave frequency shift equal to the frequency separation of ion acoustic eigenmodes excited in plasma as a result of absolute parametric decay instability. The recovery of microwave power absorption at the second pump turn on is shown using measurements of the plasma luminosity and accelerated electron fluxes.
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