beam jitlerbeam leadbeam lead technoglogybeam loadingbeam lobe switchingbeam plasma amplifierbeam power tube beam tetrodebeam raybeam riderbeam rider guidancebeam rider missilebeam splittingbeam steeringbeam widthbeam width errorbearingbearing azimuthbearing cursorbearing resolutionbearing sensitivitybeatbeat frequencybeat frequency oscillatorbeat notebeat note detectorbeatingbeating inbeatsbeavertail beambehaviourbehavioural modelingbelbellbeltbenchmarkbendbender transducerbenderelementbent antennabent pipebernoulli boxbessel filterbessel functionsbessel responsebest effortbetabeta cutoff frequencybeta particlebeta raybeta ray spectrometer