Measurement of the Momentum Flux in an Ion Beam

This paper reports on our first realization of a novel force measuring diagnostic for ion beams and plasmas with spatial resolution. First measurements have been performed in the beam of an electron cyclotron resonance ion source. Radial measurements allow to record the beam profile of the source. It is found that axial measurements of forces in combination with measurements of electric currents are well described by taking into account charge-exchange collisions. Both radial and axial measurements are in good agreement with a simple beam model based on the superposition of diverging beamlets.