1. Set up the electronics for a simultaneous operation of 26 CsI-crystal array and the active target with 76 channels.
2. Study the response of the CsI-array to a beam of 70 MeV positrons.
3. Make the trigger and perform a measurement of the decay p ->e+ n e.
4. Measure the response of the CsI-array to 70 MeV photons.
The data analysis for items 2 and 3 above is described in [Ass 95]. The description of the method for measuring the lineshape of 70 MeV photons and the corresponding data-analysis is the subject of this chapter.