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Projects with INFN



XDXL (X Drift eXtra Large)


Due to their small anode capacitance, Silicon Drift Detectors (SDD) are low noise devices, optimum detectors for low energy X-Ray measurements (1-60 KeV), but today spectroscopy-SDDs have a small active area (as large as ~1 cm2). INFN, through its Trieste branch, has world-top expertise in the design of large area (~53 cm2) multi-anode drift detectors (built for the ALIC experiment at CERN LHC accelerator). By means of the optimization of these SDDs for high energy resolution, INFN plans to enter the field of spectroscopy applications where large sensitive area is required. The ALICE SDD has been designed for position measurements of the impact point of ionizing particles close to the interaction vertices of the LHC beams, and it needs to be tailored to meet the low noise requirements of spectroscopy. Among the goals of XDXL are:

  • The realization of detectors for low energy spectroscopy and timing measurements in astrophysics space experiments,

  • The coupling of SDDs to LaBr3 Scintillators to extend the energy range for applications such as Compton gamma ray cameras, both for space experiments and medical imaging devices (e.g. SPECT detectors)

The project is in collaboration with ICTP MLAB and part of the development will be done at the Microprocessor Laboratory. The project starts officially in 2009, but preliminary work has already been carried over. The 2008 activities concerned mainly the detector noise characterization at the single anode level, with the optimization of the biasing scheme, the development of a multi-anode test set-up and the tuning of the device simulation to the measured performance.

A climatic chamber has been installed at the MLAB building for the study and characterization of silicon detectors and related electronics under different physical conditions (temperature, thermal cycles, vacuum, etc)  





This INFN Project: Fiber Apparatus for Calorimetry and Tracking with Optoelectronic Readout, with involvement of the MLAB group, was approved for funding by INFN Group V at the end of 2006.





The goal of CASIS (CAlorimetria al SIlicio per lo Spazio)  experiment is the design, development and realization of integrated front-end electronics with ultra-large dynamic range and of dedicated silicon strip detectors for future space experiments. The following are some of the research items of CASIS:

  • Development of integrated front-end electronics with very large dynamic range optimized for Si-W calorimeters for space applications

  • Study and optimization of the electric, geometric and design characteristics of silicon detectors for future Si-W calorimeters. This is of great importance in order to optimize at the same time fundamental requirements such as good signal-to-noise ratio, large dynamic range, and reduction of the number of channel and power consumption

  • Study and minimization of cross-talk phenomena between contiguous channels, an effect that becomes quite important for events giving a large energy deposition in the detectors, such as those to be studied in the future experiments. 

Since 2001 to 2006, CASIS experiment was carried out at the Trieste Section of INFN with funding of INFN Group V. The MLAB group has joined the INFN CASIS Experiment at the end of 2004. The group has contributed with its experience in programmable logic devices such as FPGA, as well as with its hardware and software design experience for High-Energy Physics instrumentation. An efficient Sigma-Delta Demodulator Architecture has been designed and implemented on FPGA by the MLab group.

For more details about CASIS Project please go to:



                                                                                               [Research at Microlab]


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