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 cm2 and 50×200 cm2), high spatial resolution (better than 100 μm) chambers based on the GEM technology and 2 small (10×20 cm) 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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机译：2014年，杰斐逊实验室（JLab）的CEBAF电子加速器将提供纵向极化（高达85％），高强度（高达100μA）的光束，最大能量为12 GeV，是目前值的两倍。为了利用能源升级将提供的新机会，正在开发一种新的光谱仪（Super BigBite — SBS），该光谱仪具有非常向前的角度，被广泛接受并能够在高光度环境下运行的能力。 SBS的跟踪系统将包括大面积（40×150 cm 2 和50×200 cm 2 ），高空间分辨率（小于100μm）的腔室，该腔室基于GEM技术和2个小（10×20 cm）硅条探测器平面。 GEM腔室及其子组件（如读数电子设备）的设计在此受到谴责。
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