Abstract
As proposed by SLAC, the efficiency of a pulse compressor of the SLED-II type could be increased by changing both the phase of the microwave source and the coupling coefficient of the delay line. In the existing SLED-II system at frequency 11.4 GHz, the resonant delay line is coupled with the source via an iris with a constant reflection coefficient. Replacement of the iris with an active component makes it possible to create an active SLED-II system. In this paper, the use of plasma switches as the active elements is discussed. Plasma switches have been developed and tested at a high-power level for production of flattop compressed pulses. Active switching of SLED-II has demonstrated a marked increase in efficiency (by 20%) and power gain (by 37%) as compared with passive switching. The active compressor has produced 173 ns rf flattop output pulses with a power of about 112 MW.
Highlights
The rf pulse compressors are a rather promising direction for development of a source of high-power nanosecond microwaves for use in future electron-positron colliders
As proposed by Tantawi, Ruth, and Vlieks [1], the efficiency and power gain of a pulse compressor of the SLED-II type could be increased by changing both the phase of the microwave source and the coupling coefficient of the delay line
This paper presents the results of studying the operation of the plasma switches with the SLED-II delay lines at a frequency 11.4 GHz
Summary
The rf pulse compressors are a rather promising direction for development of a source of high-power nanosecond microwaves for use in future electron-positron colliders. As proposed by Tantawi, Ruth, and Vlieks [1], the efficiency and power gain of a pulse compressor of the SLED-II type could be increased by changing both the phase of the microwave source and the coupling coefficient of the delay line. As it was noted in [1,2], between the compression ratios of 6 and 32 the active system has a significant advantage over the passive one In this case an increase in the coupling of the line in active SLED-II system will reduce the amount of energy left over after the output pulse is finished. The plasma switches have been developed and tested at a highpower level for production of flattop compressed pulses
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