We discuss a new class of micro pattern gas detectors, the gas pixel detector (GPD), in which a complete integration between the gas amplification structure and the read-out electronics has been reached. An application-specific integrated circuit (ASIC) built in deep submicron technology has been developed to realize a monolithic device that is, at the same time, the pixelized charge collecting electrode and the amplifying, shaping and charge measuring front-end electronics. The CMOS chip has the top metal layer patterned in a matrix of 80 mu m pitch hexagonal pixels, each of them directly connected to the underneath electronics chain which has been realized in the remaining five layers of the 0.35 mu m VLSI technology. Results from tests of a first prototype of such detector with 2 k pixels and a full scale version with 22 k pixels are presented. The application of this device for Astronomical X-ray Polarimetry is discussed. The experimental detector response to polarized and unpolarized X-ray radiation is shown. Results from a full MonteCarlo simulation for two astronomical sources, the Crab Nebula and the Hercules X1, are also reported.
|Autori:||Bellazzini R; Angelini F; Baldini L; Bitti F; Brez A; Cavalca F; Del Prete M; Kuss M; Latronico L; Omodei N; Pinchera M; Massai MM; Minuti M; Razzano M; Sgro C; Spandre G; Tenze A; Costa E; Soffitta P|
|Titolo:||Gas Pixel Detectors for X-ray Polarimetry applications|
|Anno del prodotto:||2006|
|Digital Object Identifier (DOI):||10.1016/j.nima.2006.01.046|
|Appare nelle tipologie:||1.1 Articolo in rivista|