Details

Autor(en) / Beteiligte

• Aphecetche, L.
• Delagrange, H.
• D'Enterria, D.G.
• Le Guay, M.
• Li, X.
• Martı́nez, G.
• Mora, M.J.
• Pichot, P.
• Roy, D.
• Schutz, Y.

Titel

Two large-area anode-pad MICROMEGAS chambers as the basic elements of a pre-shower detector

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2001-03, Vol.459 (3), p.502-512

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2001

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• The design of a detector based on MICROMEGAS (MICRO MEsh GAseous Structure) technology is presented. Our detector is characterized by a large active area of 398×281 mm 2 , a pad read-out with 20×22 mm 2 segmentation, and an uniform amplification gap obtained by insulating spacers ( 100 μm high and 200 μm in diameter). The performances of several prototypes have been evaluated under irradiation with secondary beams of 2 GeV/c momentum charged pions and electrons. We consider such a detector as the basic element for a pre-shower detector to equip the PHOton Spectrometer (PHOS) of the ALICE experiment. Its assets are modularity, small amount of material, robustness and low cost.