Characterization of fout GEM chambers for the SBS/BB front tracker at JLab HallA.

Re L., Bellini V., Brio V., Cisbani E., Colilli S., Giuliani F., Grimaldi A., Lagamba L., Librizzi F., Lucentini M., Mammoliti F., Musico P., Noto F., Perrino R., Petta C., Salemi M., Santavenere F., Sava G., Sciliberto D., Spurio A., Sutera M.C., Tortorici F.

Comunicazione
I - Fisica nucleare e subnucleare
Aula Palazzo dell'Emiciclo - Sala Ipogea - Martedì 24 h 09:00 - 12:00
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The new Super Bigbite (SBS) and companion Bigbite (BB) Spectrometers are under development in Hall A at JLab, for precise and extended investigation of the nucleon structure by mean of the high intensity, longitudinally polarized, up to 12 GeV CEBAF electron beam. To satisfy the main requirements for the charged particle tracking: spatial resolution $\le 0.1$ mm and high rate capability, the GEM technology has been chosen. Four GEM chambers will be used on the first GMn Form Factor experiment of the SBS+BB experimental program. The main features of this tracker and the first results of its commissioning will be presented.

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