Submillimeter-wave harmonic gyrotron experiment

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/27.55903· OSTI ID:6485394

Spira-Hakkarainen, S; Kreischer, K E; Temkin, R J ^[1]

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1. Massachusetts Inst. of Tech., Cambridge, MA (USA). Plasma Fusion Center

A theoretical and experimental investigation of the operation at submillimeter wavelengths of a harmonic gyrotron is reported. Using a waveguide cavity with an iris at the output end of the straight section, 14 different second-harmonic modes were observed with frequencies of 301--503 GHz, output powers of 1-22 kW, and a 12-MHz emission frequency bandwidth. The highest output power was 22 kW, with a total efficiency of 3.5% at 467 GHz, and an output power of 15 kW with a 6% efficiency was obtained at 417 GHz. Research was conducted using a 65--75 kV up to 10-A electron gun with 1--1.5 {mu}s pulse-length and a 4-Hz repetition rate, which produced a helical electron beam in magnetic fields of up to 14 T. These results represent the first operation of a high-power harmonic gyrotron in the submillimeter region.

• OSTI ID: 6485394
• Journal Information: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (USA) Vol. 18:3; ISSN ITPSB; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
BEAMS
CAVITY RESONATORS
CONFIGURATION
CONTROL
EFFICIENCY
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
ENERGY EFFICIENCY
EQUIPMENT
FREQUENCY MIXING
HARMONIC GENERATION
HELICAL CONFIGURATION
LEPTON BEAMS
MAGNETIC FIELDS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MODE CONTROL
OPERATION
PARTICLE BEAMS
RESEARCH PROGRAMS
RESONATORS
WAVELENGTHS