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- W3013452994 abstract "This Letter reports the successful experimental demonstration of amplification of subterahertz radiation in a klystron with photonic crystal cavities. The klystron has six cavities, with each cavity having a series of oversized photonic crystal cells made up of a $5ifmmodetimeselsetexttimesfi{}3$ array of square posts. The center post is removed from each cell to form a highly oversized ($0.8text{ }text{ }mathrm{mm}ensuremath{sim}ensuremath{lambda}/4$) beam tunnel, with power coupling from cell to cell through the tunnel. The pulsed electron beam is operated at 23.5 kV, 330 mA in a 0.5 T solenoidal field. At 93.7 GHz, a small-signal gain of 26 dB and a saturated output power of 30 W are obtained. Experimental results are in very good agreement with the predictions of a particle-in-cell code. The successful achievement of high gain operation of a photonic crystal klystron amplifier is promising for the future extension of klystron operation well into the terahertz frequency region." @default.
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- W3013452994 date "2019-12-12" @default.
- W3013452994 modified "2023-09-23" @default.
- W3013452994 title "Subterahertz Photonic Crystal Klystron Amplifier" @default.
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- W3013452994 doi "https://doi.org/10.1103/physrevlett.123.244801" @default.
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