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In this work we report a shielded ionization discharge (SID) probe which isconceptualized, designed and implemented for measuring temporal and spatialdensity profiles in a pulsed molecular beam. The probe detects and providesprofiles of neutrals of the molecular beam using small discharge which isassisted by the thermionic emission of electrons from a hot filament. In thisarticle, design and characterisation of the developed probe are discussed. Theperformance of the probe is demonstrated by measuring the spatio-temporalprofile of a 1.5 ms pulsed supersonic molecular beam. The suggested SID probecan be used to characterize and optimise the pulsed molecular beam source usedin tokamak fueling, SMBI plasma diagnostics, ion beam profile monitors, clusterbeam experiments, chemical kinetics, and other supersoinc beam relatedapplications.

Shielded ionisation discharge (SID) probe for spatio-temporal profiling of pulsed molecular beam