Design and High-Power Test of an Internal Coupler to HE11 Mode in Corrugated Waveguide for High-Power Gyrotrons

Neilson, Jeffrey M.; Ives, R. Lawrence; Schaub, Samuel C.; Guss, William C.; Rosenzweig, Guy; Temkin, Richard J.; Borchard, Philipp

doi:10.1109/ted.2018.2805889

Design and High-Power Test of an Internal Coupler to HE₁₁ Mode in Corrugated Waveguide for High-Power Gyrotrons

Journal Article · Wed Feb 28 00:00:00 EST 2018 · IEEE Transactions on Electron Devices

DOI:https://doi.org/10.1109/ted.2018.2805889· OSTI ID:1774087

^[1]; ^[2]; Schaub, Samuel C. ^[3]; Guss, William C. ^[3]; Rosenzweig, Guy ^[3]; ^[3]; Borchard, Philipp ^[4]

Calabazas Creek Research, Inc., San Mateo, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Calabazas Creek Research, Inc.
Calabazas Creek Research, Inc., San Mateo, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Dymenso LLC, San Francisco, CA (United States)

Gyrotrons produce power in high-order, transverse electric modes that are typically converted to a Gaussian beam inside the tube. In fusion plasma heating applications, the power is transmitted through a diamond window to an external mirror optical unit where it is coupled into an HE₁₁ mode in corrugated waveguide. A new coupler is described that couples the cavity RF power directly into corrugated waveguide inside the gyrotron. A high power gyrotron with the improved coupler was tested using 1-MW, 3-μs pulses and demonstrated equivalent power and efficiency as a traditional coupler with HE₁₁ mode output in corrugated waveguide. In addition, higher HE₁₁ mode purity was achieved at the gyrotron output.

Research Organization:: Calabazas Creek Research, Inc., San Mateo, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-05ER84181

OSTI ID:: 1774087

Journal Information:: IEEE Transactions on Electron Devices, Journal Name: IEEE Transactions on Electron Devices Journal Issue: 6 Vol. 65; ISSN 0018-9383

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (4)

Laser-driven semiconductor switch for generating nanosecond pulses from a megawatt gyrotron Picard, Julian F.; Schaub, Samuel C.; Rosenzweig, Guy Applied Physics Letters, Vol. 114, Issue 16 https://doi.org/10.1063/1.5093639	journal	April 2019
To the theory of gyrotrons with confocal resonators Nusinovich, Gregory S. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5099909	journal	May 2019
Development of high power gyrotrons for advanced fusion devices Kariya, T.; Minami, R.; Imai, T. Nuclear Fusion, Vol. 59, Issue 6 https://doi.org/10.1088/1741-4326/ab0e2c	journal	April 2019
Measurement of Dielectric Multipactor Thresholds at 110 GHz Schaub, S. C.; Shapiro, M. A.; Temkin, R. J. Physical Review Letters, Vol. 123, Issue 17 https://doi.org/10.1103/physrevlett.123.175001	journal	October 2019

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HE11 mode
corrugated waveguide
gyrotron
quasi-optical (QO) internal coupler