An alternating‐gradient magnetic spectrometer has been constructed. The spectrometer consists of two magnetic lenses that deflect the analyzed particles through a total angle of 30°. It is able to analyze protons with energies up to 6 Mev and has a solid angle of 0.012 sterad and a momentum resolutionR=p/dp=77 for 0.5‐mm exit slit. The distance between the source and image positions is 85 cm.