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Output energy exceeding 20 μJ has been achieved in the EUV region at 61 nm by the harmonic seeded FEL scheme. Event ratio of the seeded FEL operation has been dramatically improved by a feedback system with an electro-optic sampling technique.
The effect of the phase patterns of antennas onboard flying spin satellites on the Doppler measurements is reported. Phase patterns mean that there are deviations in wave fronts from perfect sphericity, expressed as a function of the angular position around the antenna. We analyzed what effect the phase patterns of dipole and patch antennas onboard two flying spin satellites, Rstar and Vstar, used...
This paper describes the phase noise reduction technique by controlling terminal impedance of fundamental and second harmonic frequencies in VCO. To achieve low phase noise, the correlation between phase noise and second harmonic impedance in oscillator is investigated and two conditions to suppress phase noise are revealed. According to this investigation, a novel VCO is proposed to optimize the...
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