Author/Authors :
V.G Ableev، نويسنده , , V. and Ambrosino، نويسنده , , F. and Apollonio، نويسنده , , M. and Bene، نويسنده , , P. and Blondel، نويسنده , , A. and Catanesi، نويسنده , , M.G. and Chiefari، نويسنده , , G. and Chimenti، نويسنده , , P. and Favaron، نويسنده , , P. and Gastaldi، نويسنده , , U. and Giani، نويسنده , , S. D. Giannini، نويسنده , , G. and Gschwendtner، نويسنده , , E. and Legrand، نويسنده , , J.-C. and Lollo، نويسنده , , M. and Muss، نويسنده ,
Abstract :
TPG is the acronym for a 3D imaging gas chamber with GEM amplification, hexaboard read-out and FADC electronics. We have constructed a TPG-head with three GEM foils (30 cm diameter) and a read-out board (30 cm diameter active surface) covered with 710,000 hexagonal pads of 300 μ m size. Aligned pads are connected in parallel to one strip out of three sets of 576 parallel strips ( 500 μ m pitch). The three sets of strips run at 120 ∘ from each other and at three different depths inside the hexaboard multilayer structure. Each strip is read out by FADC electronics. The TPG-head is under initial test in a small container with a drift volume 33 mm long and of 30 cm diameter. A 150 cm long drift volume inside a 0.7 T solenoidal magnetic field has been prepared by using HARP-TPC instrumentation as test bed.
