Calibration of drift chambers and calorimeter of BigBite spectrometer

Method of calibration of the calorimeter and drift chambers of the BigBite spectrometer having been used in the experiment on measuring the neutron electric form-factor is presented. The BigBite spectrometer provided measurement of the direction and momentum of scattered electron by means of measuring its trajectory after passing through the magnetic field. Calibration of the set of detectors of the BigBite spectrometer was important for success of the experiment.