Speaker
Description
The active matrix of the RD50 HV-CMOS MPW2 prototype consists of 8x8 pixels with analogue frontend only. While former measurements on irradiated sensors have been performed only at passive test-
structures, first results of the irradiated active matrix are discussed in this presentation. The test structures do have a similar layout than the active matrix, but only one pixel at a time can be measured by contacting it with probe needles. Each pixel of the active matrix can be readout one after the other. A slow control using a shift-register allows to automatize readout. A DAQ system has been developed already and has been successfully verified on non-irradiated chips. Details about the DAQ system have been reported in the last workshop as well. The same system is used for reading out the irradiated sensor samples. A setup for using a radioactive source together with the MPW2 is established as well.
Moreover, preparations for a first test beam at MedAustron, a clinical proton beam facility close to Vienna, are ongoing. This needs a new trigger setup and a slightly adapted readout system, which is currently under development.
In this contribution, we will show results from measurements of the irradiated matrix and compare them with the unirradiated sensors. A beta source is used to generate signals in the sensor for comparison. Finally, first thoughts about a setup and an outlook for a first test beam using the active matrix of MPW2 are given.
