Commissioning of the 34-GHz, 45-MW Pulsed Magnicon

Quasi-Optical 34-GHz Rf Pulse Compressor

“…The block diagram of the experimental setup included several generators: the Gunn-diode microwave generator with a built-in varicap (1), the generator of pulses with controlled shapes to control the frequency of the microwave generator by sending a voltage pulse to the varicap (2), the electrically controlled former of the envelope of microwave pulses (3), and the generator feeding the envelope former (4). The required rate of frequency tuning to create the necessary linear frequency modulation was achieved by setting the corresponding rate of voltage build-up in the controlling pulse of generator (2). In this case, separate calibration of the dependence of the frequency of the microwave generator (1) on the voltage applied was taken into account.…”

“…In this case, separate calibration of the dependence of the frequency of the microwave generator (1) on the voltage applied was taken into account. The optimal initial frequency detuning from the resonant frequency was sought directly during the experiment by means of varying the constant component of the pulse amplitude in generator (2).…”

“…19. The reflecting diffraction grating was formed by a metal mirror (1) and a periodical structure over it (2). Distribution of electric and magnetic currents set in the plane (3) over the grating radiated a plane wave (4) towards the gratings.…”

“…Motivation for developing high-power mm-wave technology, including an RF source, accelerating structure, associated components, and an RF pulse compressor, is provided by the assumed classical scaling of accelerating gradient with frequency, which is approximately linear [2]. Thus NLC, operating at 11.424 GHz, was to achieve an unloaded accelerating gradient of 77 MV/m [3], approximately four times greater than that achieved at 2.856 GHz at SLC.…”

Modified magnicon for high-gradient accelerator R&D

“…The 34.3 GHz magnicon [1], developed by Omega-P beginning in 1996, was a key element at the Yale University Beam Physics Laboratory [2]. As configured, the tube could supply only limited-but diminishing-RF power for a number of current advanced accelerator R&D and particle physics experiments.…”