Low-loss broadband multimode corrugated waveguide performance

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141369· OSTI ID:6503711

Cavallo, A; Doane, J; Cutler, R ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton, NJ (USA)

A 30-m-long waveguide run using circular corrugated waveguide (i.d.=6.35 cm) with a corrugated period and depth of 254 {mu}m (0.01 in.) has been fabricated and installed on TFTR (Tokamak Fusion Test Reactor) for use in electron cyclotron emission measurements, and is the first large scale application of this type of waveguide. It is designed for low-loss ({lt}0.01 dB/m) multimode operation between 75 and 575 GHz, and includes three {ital E}-plane and four {ital H}-plane miter bends. Single-mode measurements at 140 GHz and multimode measurements at 250 GHz indicate that both ohmic losses as well as loss due to mode conversion are negligible with this type of transmission line.

• OSTI ID: 6503711
• Journal Information: Review of Scientific Instruments; (USA), Journal Name: Review of Scientific Instruments; (USA) Vol. 61:9; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ATTENUATION
BREMSSTRAHLUNG
CYCLOTRON RADIATION
DESIGN
ELECTROMAGNETIC RADIATION
ENERGY LOSSES
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
GHZ RANGE 100-1000
LOSSES
MACHINING
PLASMA DIAGNOSTICS
POWER LOSSES
RADIATIONS
TFTR TOKAMAK
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
WAVEGUIDES