Active Pixel Sensor as a Vertex Detector for the ILC

par Peter Fischer (Universität Heidelberg)

lundi 9 juin 2008, 14:00 → 15:00 Europe/Paris

Amphithéâtre

Large matrices of DEPFET sensors are a promising technology for the ILC Vertex Detector because they allow the construction of a very thin radiation tolerant module. In one possible geometry, pulse-cleared MOS-based DEPFET pixels of ~ 25x25 um2 size are arranged in modules with an active area of ~1.3x10 cm2. This active part can be as thin as 50um. A thicker silicon frame provides stability for a self-supporting module. The readout is performed by sequentially addressing pixel rows with analog multiplexer chips located at the module edge and by digitizing the drain currents with specialized readout chips at a rate of some 10MHz. The talk will recall the DEPFET principle and the readout concept. The individual components - matrices, control and readout chips - will be described in some detail. Recent results from irradiations, lab measurements and test beams will be presented.