Conceptual design of a sputtered atom source for calibrations of satellite-borne energetic neutral atom instruments

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In this report parameters for the design of a source of energetic neutral atoms, ENAs are suggested. The source is designed to be able to calibrate satellite-borne ENA measuring instruments. It is based upon the sputtering effect, using a 10 keV Ar+ ion beam as input to generate a well defined atomic beam in the energy range of 10 - 200 eV with the size of one square centimeter. The flux is approximately 0.06 - 80 atoms per second and square centimeter, depending on the material in use. The properties of the atomic beam are controlled by a velocity selecting mechanism based on mechanical ultra fast shutters, being able to produce a DeltaE/E lower than 10%. The atomic species is decided by the type of sputtering target, Fe being the heaviest possible element to use. The source is adapted to...