165 GHz, 1.5 MW-coaxial cavity gyrotron with depressed collector |
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Authors: | Piosczyk B. Braz O. Dammertz G. Iatrou C.T. Illy S. Kuntze M. Michel G. Thumm M. |
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Affiliation: | Inst. fur Tech. Phys., Karlsruhe Univ.; |
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Abstract: | A further step in the development of a coaxial-cavity gyrotron operated in the transverse electric TE-31,17 mode at 165 GHz is presented. The gyrotron has been equipped with a quasi-optical output system consisting of a Vlasov launcher with a single cut and two mirrors, one with a quasi-elliptic and the other with a nonquadratic phase correcting surface. The radio frequency (RF) power is transmitted through a single output window. A maximum output power of 1.7 MW has been achieved. At the nominal operational parameters an RF power of 1.3 MW with an efficiency of 27.3% has been measured. The efficiency increases to 41% in operation with a single-stage depressed collector |
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