GATING GEM. GDD Meeting December the 17 th Gabriele Croci. Experimental Setup. 8.9 keV Copper X-Rays. Drift. A. 13 mm. E D. Preamp GEM. B. 2 mm. E T1. Gating GEM. C. 3 mm. E T2. Bottom GEM 1. 2 mm. E T3. Bottom GEM 2. 2 mm. E I. No PreAMP GEM Measurements. C. B. Pedestal. - PowerPoint PPT Presentation