18-22 February 2019
Vienna University of Technology
Europe/Vienna timezone

APiX: a two-tier avalanche pixel sensor for charged particle detection and timing.

20 Feb 2019, 09:25


Talk Semiconductor Detectors Semiconductor Detectors


Dr Paolo Brogi (Univ. of Siena and INFN Pisa, IT)


A novel pixelated charged particle detector with fast timing capabilities is under development. It addresses two important requirements for the next generation of position sensitive detectors: minimization of material budget and power consumption, while providing high granularity and excellent timing. It is a "thin" (tens of micron), window-less, vertically integrated, CMOS detector. Internal gain and fast timing (tens of ps) are provided by operating the sensor in quenched Geiger mode. Each pixel on the upper tier is vertically integrated with its corresponding partner on the second tier and operated in coincidence. This dramatically reduces the dark count rate and allows digital mode operation. A proof-of-principle prototype was implemented in a 150 nm CMOS process and tested with high energy particle beams at CERN. The device radiation tolerance was investigated, via irradiation, at Legnaro National Laboratory (LNL). A second prototype featuring a larger fill-factor has been manufactured and characterized. Potential applications include high resolution tracking and radiation monitoring in space-borne experiments and radiation imaging in nuclear medicine. A small hand-held demonstrator is under construction for radio-guided surgery.

Primary authors

Dr Paolo Brogi (Univ. of Siena and INFN Pisa, IT) Dr Gabriele Bigongiari (Univ. of Siena and INFN Pisa) Dr Caterina Checchia (Univ. of Padova and INFN) Gianmaria Collazuol (Universita e INFN, Padova (IT)) Gian-Franco Dalla Betta (University of Trento and TIFPA) Andrea Ficorella Prof. Pier Simone Marrocchesi (University of Siena (IT) and INFN Pisa) Fabio Morsani (INFN Pisa) M. Musacci (Univ. di Pavia and INFN Sezione di Pavia) S. Noli (Univ. di Pavia and INFN Sezione di Pavia) Lucio Pancheri (University of Trento and TIFPA) Aurore Savoy Navarro (Laboratoire APC, University Paris-Diderot/CNRS Paris) L. Silvestrin (Univ. of Padova and INFN Sezione di Padova) Dr Francesco Stolzi (Univ. of Siena and INFN Pisa) Dr Arta Sulaj (Univ. of Siena and INFN Pisa) J.E. Shu (Univ. di Siena and INFN Sezione di Pisa) Prof. Lodovico Ratti (University of Pavia and INFN) C. Vacchi (Univ. di Pavia and INFN Sezione di Pavia) M. Zargami (Univ. di Trento, TIFPA)

Presentation materials