Development of high-power CARM (cyclotron auto-resonance maser) oscillators. Memorandum report, October 1987-October 1988

Technical Report · Tue Mar 14 04:00:00 EST 1989

OSTI ID:5773819

Fliflet, A W; McCowan, R B; Sullivan, C A; Kirkpatrick, D A; Gold, S H

The Cyclotron Auto-Resonance Maser (CARM) is under investigation at the U.S. Naval Research Laboratory as an efficient source of high-power millimeter-wave and submillimeter-wave radiation for applications such as plasma heating, advanced rf accelerators, and space-based radars. A short-pulse 100 GHz CARM oscillator experiment based on a 600-kV, 200-Amp, 50-nsec electron beam is under way. The mode-selective, high-Q waveguide cavity with rippled-wall Bragg reflectors is designed to operate in the TE61 mode. A novel code cathode diode is used to produce a high quality annular beam with a momentum pitch ratio of 0.6. The cathode features nonemitting focusing electrodes and an annular velvet emitter. The main objective of the experiment is to demonstrate high efficiency approx. 20% at a power of approximately 20 MW. In addition, a long pulse 250 GHz CARM oscillator experiment based on a 500-kV, 100-Amp, 1-microsec MIG-type thermionic cathode electron gun is planned. The design of these experiments and the optimization of CARM oscillator efficiency are discussed.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• OSTI ID: 5773819
• Report Number(s): AD-A-206270/1/XAB; NRL-MR-6388
• Country of Publication: United States
• Language: English

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ACCELERATORS
AMPLIFIERS
BEAMS
BRAGG REFLECTION
CATHODES
CYCLOTRON RESONANCE
DOCUMENT TYPES
EFFICIENCY
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
HEATING
LEPTON BEAMS
MASERS
MEASURING INSTRUMENTS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OPTIMIZATION
OSCILLATORS
PARTICLE BEAMS
PLASMA
PROGRESS REPORT
PULSES
RADAR
RADIATIONS
RADIOWAVE RADIATION
RANGE FINDERS
REFLECTION
RESONANCE
SHORT WAVE RADIATION