20-Mw Pulsed Amplifying Klystron Operating in Positive Feedback Mode
The results of investigation of the regenerative oscillation amplification mode and the selfoscillation synchronization mode for the power pulsed amplifying positive-feedback klystron are reported. In Ref. there was described the autogenerator on the KUY-12 pulsed amplifying klystron, used for feeding the accelerating sections of the electron linac. To enhance the self-oscillation frequency stability, a high-quality resonator is introduced into the feedback circuit. This however results in noticeable increase in the oscillation growth time with respect to anode pulse. The investigation results of the KUY-12 operating either in the oscillation regeneration mode or in the self-oscillation frequency synchronization mode are presented.
Synchronization of pulsed oscillators
It is shown that driven pulsed oscillators behave in a manner very similar to driven CW oscillators. Simple criteria are given which allow one to decide easily from the frequency spectrum if the oscillators are locked or not.
Influence of electric fields on friction electrification between metals and borosilicate glass
Abstract In a cylindrical geometry, electric fields were applied through the entire contact area between the sliding metal and the glass surface. The maximum electric charges developed on the metal were measured and plotted against the applied voltage producing the field. The metals were high-purity nickel and gold. The borosilicate glass was Pyrex, brand 7740. The experiments with nickel, which has a work function greater than that of the glass, were performed in 10 −7 mm Hg vacuum. The experiments with gold, with a work function smaller than that of glass, were carried out in air at atmospheric pressure. The results show that: 1. 1) There is both asymmetry and a reversed slope portion in the charge vs. voltage plot. 2. 2) For a certain range of reversing fields, the electric charge developed on the nickel is always negative and the charge on gold is always positive.