Soft Report - Dipartimento di Fisica - Sapienza

Ongoing European ProjectsWhitin FP6 we partecipaate to the Integrated Infrastructure Iniziative for neutron and muon, called NMI3. Whithinthis iniziative there are two activities devoted to:1) High resolution and high speed 2d solid state neutron detectors2) New manipulating devices, mainly honeycomb like collimators and neutron Zone PlatesThe work on the detector was devoted to two major aspects of the solid state detector development, that is thedevelopment of a new VLSI ASIC to be used s front-end electronics and a new Si sensor for the development of a0.1 mm resolution detector over an area of several square centimeters. In parallel 1d detector with 0.5 mmresolution and maximum counting rate of 10 MHz over an area of 40x70 mm2 is being tested. During 2004 and2005 a first version of the ASIC has been completed and tested obtaining the expected peaking time of 30 ns andthe adequate equivalent noise of 500 e rms.Honeycomb converging collimator, 2m lond, 0.4 degsdivergence.0.250.20.150.10.0500.4-0.2 -0.1 0 0.1 0.2shift (mm)0.30.2The new high resolutionmicrostrip Si sensor.Wafer before cutting anddetail of the sensor pads.The sensor has aresolution of 80 m and640x640 strips.0.10-0.2 -0.1 0 0.1 0.2shift (mm)Response of a single strip coatedwith metal (blue) and oxide (red),converter in front (solid line) andon the back (dashed line) using a1m (left) and 5 m (right) thickconverter. Neutron wavelengthfixed equal to 2 Å. Only the 80 keVelectrons are considered.111SOFT Scientific Report 2004-06