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Author:
Mammoliti, F.   Bellini, V.   Cisbani, E.   Librizzi, F.   Musico, P.   Noto, F.   Perrino, R.   Sutera, M.C.   Giardina, G.   Eidelman, S.   Venanzoni, G.   Mandaglio, G.  


Journal:
EPJ Web of Conferences


Issue Date:
2014


Abstract(summary):

A new Large-Acceptance Forward Angle Spectrometer (Super BigBite) is under development at JLab/Hall A to optimally exploit the exciting opportunities offered by the 12 GeV upgrade of the electron beam. The tracker of this new apparatus is based on the Gas Electron Multiplier (GEM) technology, which has been chosen to optimize cost/performance, position resolution and to meet the high hit rate (>1 MHz/cm(2)). The first GEM detector modules, designed and built by the INFN Collaboration JLAB12, were tested at the DESY test beam facility in Hamburg, by using an electron beam with energy ranging from 2.0 to 6.0 GeV. In particular, two 40x50 cm(2) and one 10x10 cm(2) GEM chambers were equipped with a new implementation of the APV25 readout chip. Measurements were performed at different impact points and angles between the electron beam and the plane of the GEM chambers, with one large chamber in a solenoid magnetic field up to 500 Gauss. In this report we present the technical characteristics of the detector and comment on the presently achieved performance.


Page:
00015


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