We have performed measurements of the spatial distribution of current in various alkali and reactive ion beams over the energy range 5–600 eV using a Faraday cup. Ion beam current densities have been extracted from these measurements using a simple deconvolution procedure. Our results reveal that the beams are Gaussian in shape with a constant width, s , for energies greater than approximately ...

Design and construct ion of a stable current supply with protect ion circu its are Abstract described. The reported circuit provides a high-stable and high-level current variable from 0.5 -1.2 A with the prot ect ion circu its to prevent over load cur ren t , voltage and off-range temperature operat ion. A detailed analysis of the circu it parameters is given and the time behaviors of the load ...