Karlsruhe 2011 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 65: Halbleiterdetektoren V

T 65.1: Vortrag

Freitag, 1. April 2011, 14:00–14:15, 30.21: 001

The power pulsing studies of the Mimosa26 chip for the PLUME project — •Olena Bachynska — DESY, Hamburg, Deutschland

The physics of the ILC and the ILC machine environment present the real challenges to the detector designers. The clean initial state and the comparatively benign environment of a lepton collider are ideally suited to high precision measurements. To take a full advantage of the physics potential of ILC places great demands on the detector performance in a resolution and material budget. The PLUME project is aiming to design, fabricate and test a demonstrator ladder featuring minimal material budget and equipped with CMOS sensors on its both sides with possibility to operate in a strong magnetic field. Due to the 200ms cycle of the ILC machine and a necessity of a cooling there was taken a decision to pulse the power of the detector. So the behavior of the CMOS sensor Mimosa26 in the so called power pulsing mode need to be studied in details. There are several possibilities to pulse the power on the chip. This work represents the studies of the stand alone chip Mimosa26 properties in the different power pulsing conditions. The chip itself can operate in the two read out modes: analogue and digital. This work shows pedestals, noises and signals behavior in the analogue case of read out. To eliminate the sensor the Fe55 source and infrared laser were used. Both measurements analyzed and conclusions about the recovery time and abilities to operate in mentioned above conditions are made.