The low-mass drift chamber system of the MEG experiment

The low-mass drift chamber system is part of the specially designed positron spectrometer of the MEG experiment. The system is designed to ensure precision measurement of 52.8 MeV/c positrons and consists of 16 independent drift chamber modules. The amount of material along the positron trajectory of one drift chamber module sums up to an average value of only X
_0,module
= 2.6·10
^-4
of a radiation length.