Danny Lafrance

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Traditional variable-phase, multiple-output oscillators have been constructed using phase-locked loops synched to a master oscillator. Phase control is achieved by introducing a DC offset into the VCO, thus forcing the loop to compensate by shifting its phase. Such systems have limited phase shift range and often have transient locking problems leading to(More)
A complete phase feedback system has been implemented for the high harmonic fast wave (HHFW) transmitters on the National Spherical Torus Experiment. This system allows the phase of the antenna loops to be defined regardless of plasma and transmitter interaction. The system consists of two multi-channel phase detectors (presented at the 19th SOFE),(More)
A novel iodide-catalyzed reduction method using hypophosphorous and/or phosphorus acids was developed to reduce both diaryl ketones and nitroarenes chemoselectively in the presence of chloro and bromo substituents in high yield. This efficient and practical method has been successfully applied to a large scale production of a potential anticancer agent.
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