ABSTRACT
A Bragg Curve Spectrometer has been developed for detection of heavy ions with energies of a few MeV/nucleon. The intermediate energy, medium mass nuclear fragments will be detected with Bragg Curve Spectrometers, placed between the multiwire proportional chambers - and scintillator detectors as the second layer of the array. A logarithmic detector for nuclear experiments with up to about 200 MeV/nucleon beam energies has been built. It consists of a stack of a low-pressure MWPC for slow and heavy fragments, a Bragg Curve Spectrometer for intermediate energy fragments and scintillator telescopes for light particles. A field shaping grid gives the Bragg Curve Spectrometer a radial field. The charge is read off a Frisch gridded anode. The charge created by a stopping charged heavy ion is drifted to the Frisch grid shielded anode. One measures the charge collected at the anode as a function of time, and thus obtains the complete energy loss distribution of the stopping particle.
