Author/Authors :
Prest، نويسنده , , M. and Vallazza، نويسنده , , E. and Chiavacci، نويسنده , , M. and Mariani، نويسنده , , R. and Motto، نويسنده , , S. and Neri، نويسنده , , M. and Scantamburlo، نويسنده , , N. and Arfelli، نويسنده , , F. and Conighi، نويسنده , , A. and Longo، نويسنده , , R. and Olivo، نويسنده , , A. K. Pani، نويسنده , , S. and Poropat، نويسنده , , P. and Rashevsky، نويسنده , , A. and Rigon، نويسنده , , L. and Tromba، نويسنده , , G. and Castel، نويسنده ,
Abstract :
FRONTier RADiography is an R&D project to assess the feasibility of digital mammography with Synchrotron Radiation at the ELETTRA Light Source in Trieste. In order to reach an acceptable time duration of the exam, a fast- and low-noise photon counting ASIC has been developed in collaboration with Aurelia Microelettronica, called Frontrad ReadOut SysTem. It is a multichannel counting system, each channel being made of a low-noise charge-sensitive preamplifier optimized for X-ray energy range (10–100 keV), a CR-RC2 shaper, a discriminator and a 16-bit counter. In order to set the discriminator threshold, a set of a global 6-bit DAC and a local (per channel) 3-bit DAC has been implemented within the ASIC. We report on the measurements done with the 8-channel prototype chip and the comparison with the simulation results.
Keywords :
Frontend electronics , High rate , low noise , digital mammography
