Observation of the bremsstrahlung generation in the process of the Rayleigh–Taylor instability development at gas puff implosion

Abstract

The electron magnetohydrodynamic model predicts the appearance of anode–cathode voltage in the process of Rayleigh–Taylor instability development during gas puff implosions. The appearance of the anode–cathode voltage should be accompanied by the accelerated electron flow and the generation of the bremsstrahlung radiation. Experiments with neon and krypton gas puffs were performed on the GIT-4 [S. P. Bugaev, et al., Plasma Sci. 18, 115 (1990)] generator (1.6 MA, 120 ns) to observe the bremsstrahlung radiation during the gas puff implosion. Two spikes of the bremsstrahlung radiation were observed in the experiments. The first spike is connected with the gas breakdown; the second one is connected with the final stage of the implosion. The development of the RT instabilities does not initiate the bremsstrahlung radiation, therefore, the absence of anode–cathode voltage is demonstrated.