Post on 18-Jan-2018
description
Prof. Christer Fröjdh
Radiation detector research at Mid Sweden University
Mittuniversitetet
Resources
• Cleanroom for detector processing• Class 1000, 4 inch wafers• Lithography, heat treatment, metallization,
etching ..
• Radiation lab• Nanofocus X-ray source – 160 kVp• Radioactive sources• Different spectroscopic and imaging detectors
• Simulation• Radiation interaction and charge transport• MCNP, Geant4, MEDICI …
Mittuniversitetet
Single particle processing detectors
• Member of the MEDIPIX collaboration since 2000• MEDIPIX3 – spectral X-ray imaging with on chip
charge summing• TIMEPIX3 – event driven pixel detector with time
and energy information per pixel
• Common features• Hybrid pixel detectors
• Silicon and High-z materials• Neutron converters could be applied
• 256 x 256 pixels with a pitch of 55 um• Energy bins or energy per event• Tiling to make large areas
Mittuniversitetet
Neutron detectors
• 3D neutron detector structures• Etching of pores in silicon• Wall preparation to form junctions• Filling with neutron converter• Readout using TIMEPIX3
• Scintillator based neutron detectors using scintillating guides screens
• Scintillator filled pores in silicon• Readout using photosensitive pixel
detectors
Mittuniversitetet
Main activities at Mid Sweden University
• Simulation• Geant4 based framework for simulation
of radiation interaction, charge transport and electronics behavior
• Processing• Processing of detector modules
• Characterisation• Charge sharing and signal formation in
hybrid pixel detectors • Fundamentals of spectral X-ray imaging
• Material separation• Properties of different sensor materials