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One of the alternative ‘dry’ methods for spent nuclear fuel (SNF) reprocessing is the plasma mass separation technique. This letter describes the first experiments that demonstrate the fundamental feasibility of a plasma mass separation approach in crossed electric and magnetic fields in collisionless mode. The Ag + Pb mixture was used to simulate the heavy (>235 u) and light (

The results are given of theoretical and experimental investigations of stimulated emission from a modelocked negative-feedback solid-state (ruby) laser. Under certain conditions, governed by the delay time in the feedback circuit, the laser suffers from high-frequency instabilities in the form of sehvlocked intermode beats. These instabilities increase significantly the stringency of the requirements which have to be satisfied if negative feedback is to be used for amplitude stabilization.

A simple model is proposed for the description of pulsations (spiking) of the radiation emitted by a solid-state laser. The model is based on rate equations with random forces. When the noise level reaches a certain small critical value, the emission becomes quasiperiodic. Spiking is observed at a higher noise level. Experimental results obtained in studies of the amplitude stabilization are interpreted.

The results are given of an experimental investigation of the amplitude and spectral characteristics of the emission of a ruby laser excited by external light pulses. It is shown that such excitation can stabilize the frequency and amplitude of the output radiation of the ruby laser. The dependences of the degree of stabilization of the frequency and amplitude of the output radiation on the difference between the frequencies of the laser output and the external signal are reported.