A long-pulse millimeter-wave free electron maser 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/10.1109/27.55908· OSTI ID:6803250

Boehmer, H; Christensen, T; Caponi, M Z; Hauss, B ^[1]

---

1. TRW Space and Technology Group, Redondo Beach, CA (USA)

A new experimental free electron maser (FEM) facility is described which operates in the millimeter-wave regime. The experiment demonstrates that high gain and beam extraction efficiency can be obtained with low-current but high-quality electron beams. In the oscillator configuration, microwave powers of 110 kW were achieved with a 300-kV, 4-A beam, corresponding to a beam extraction efficiency of 9.2%. At low beam currents, with the system operating in the linear regime, the FEM gain curve was measured. The experiment uses a Pierce-type gun with a calculated beam emittance of 10.7-mm mrad at 300 kV and 4 A. The wiggler is of the iron permanent magnet hybrid design. The experiment is intended as a first step towards the development of CW devices that use beam energy recovery to make use of the low-current, high-voltage power supplies.

• OSTI ID: 6803250
• 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) Journal Issue: 3 Vol. 18; ISSN ITPSB; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
AMPLIFIERS
BEAM EXTRACTION
BEAMS
CALCULATION METHODS
DATA
DESIGN
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FREE ELECTRON LASERS
FUNCTION GENERATORS
GAIN
HIGH-VOLTAGE PULSE GENERATORS
INFORMATION
LASERS
LEPTON BEAMS
LONG WAVE RADIATION
MAGNETS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
NUMERICAL DATA
OSCILLATORS
PARTICLE BEAMS
PERMANENT MAGNETS
PULSE GENERATORS
RADIATIONS
RADIOWAVE RADIATION
TEST FACILITIES