In 2014 the CEBAF electron accelerator at Jefferson Lab (JLab) will deliver a longitudinally polarized (up to 85%), high intensity (up to 100 μA) beam with maximum energy of 12 GeV, twice the present value. To exploit the new opportunities that the energy upgrade will offer, a new spectrometer (Super BigBite - SBS) is under development, featuring very forward angle, large acceptance and ability to operate in high luminosity environment. The tracking system of SBS will consist of large area (40×150 cm~2 and 50×200 cm~2), high spatial resolution (better than 100 μm) chambers based on the GEM technology and 2 small (10×20 cm~2) Silicon Strip Detector planes. The design of the GEM chambers and its sub-components such as the readout electronics is resented here.
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