RESEARCH AND INVESTIGATION LEADING TO METHODS OF GENERATING AND DETECTING RADIATION IN THE 100 TO 1000 MICRON WAVE-LENGTH RANGE OF THE SPECTRUM. Final Report

Technical Report · Tue Feb 28 00:00:00 EST 1961

OSTI ID:4843631

Hakki, B

A high energy, tightly bunched, beam was used to generate coherent electromagnetic radiation in the low millimeter range. The devices used to couple power out of this beam were: a high order mode right circular cylindrical cavity, a dielectric tabe resonator, a dielectric tube waveguide, a helix waveguide, and a slab of dielectric. Interaction of the beam with these devices was experimentally verified and agreement with theory is reasonable. Cherenkov radiation in the slab of dielectric was shown to yield less power than the rest of the coupling schemes; however it has no mode interference problems. The coupling schemes which were fully analyzed but not experimentally tested include: Cherenkov radiation in a gyrotropic plasma waveguide, Cherenkov radiation in a gyrotropic plasma medium, and Doppler frequency shift from high energy electron bunches. A gas discharge frequency multiplier was used to generate the l3th harmonic of the fundamental at microwave frequencies. Analysis of this device was completed and agreement between theory and experiment was excellent. The gas discharge was also used as a frequency mixer at high power levels. Frequency multiplication in ferroelectric materials was shown to be impractical, at the present, because of the lack of a material which is sufficiently lossless and nonlinear. A Doppler-Helitron microwave oscillator was proposed. The mode of operation was theoretically analyzed but no experimental verification was done. A complete line of microwave components was de veloped for the 140 to 220 kmc band. This included: crystal multipliers, waveguide flanges, crystal detectors, bolometers; tunable shorts, VSWR measuring devices, frequency meters, tapered transitions, horns, variable phase shifters, power dividers, bends and twists, terminations, attenuators, and mode converters. (auth)

• Research Organization: Illinois. Univ., Urbana. Electrical Engineering Research Lab.
• DOE Contract Number: AT(11-1)-392
• NSA Number: NSA-15-027783
• OSTI ID: 4843631
• Report Number(s): TID-12844
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-61
• Country of Publication: United States
• Language: English

Related Subjects

ENGINEERING AND EQUIPMENT
BEAMS
BOLOMETERS
CHERENKOV RADIATION
CRYSTAL COUNTERS
CYLINDERS
DIELECTRICS
DOPPLER EFFECT
ELECTROMAGNETIC WAVES
ELECTRONIC EQUIPMENT
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
INTERFERENCE
MICROWAVES
OSCILLATIONS
PLASMA
POWER
RADIATION DETECTORS
SPECTRA
SPECTRAL SHIFT
THERMOMETERS