CERN Accelerating science

Published Articles
Title	GigaTracker, a Thin and Fast Silicon Pixels Tracker
Author(s)	Velghe, Bob (Louvain U.) ; Rinella, Gianluca Aglieri (CERN) ; Bonacini, Sandro (CERN) ; Ceccucci, Augusto (CERN) ; Kaplon, Jan (CERN) ; Kluge, Alexander (CERN) ; Mapelli, Alessandro (CERN) ; Morel, Michel (CERN) ; Noël, Jérôme (CERN) ; Noy, Matthew (CERN) ; Perktold, Lukas (CERN) ; Petagna, Paolo (CERN) ; Poltorak, Karolina (CERN) ; Riedler, Petra (CERN) ; Romagnoli, Giulia (CERN) ; Chiozzi, Stefano (INFN, Ferrara) ; Cotta Ramusino, Angelo (INFN, Ferrara) ; Fiorini, Massimiliano (CERN) ; Gianoli, Alberto (INFN, Ferrara) ; Petrucci, Ferruccio (INFN, Ferrara) ; Wahl, Heinrich (Ferrara U.) ; Arcidiacono, Roberta (INFN, Turin) ; Jarron, Pierre (CERN) ; Marchetto, Flavio (INFN, Turin) ; Gil, Eduardo Cortina (Louvain U., Inst. Phys. Nucl.) ; Nuessle, Georg (Louvain U.) ; Szilasi, Nicolas (Louvain U.)
Publication	SISSA, 2014
Number of pages	8
In:	PoS RD13 (2014) 006
In:	11th International Conference on Large Scale Applications and Radiation Hardness of Semiconductor Detectors, Florence, Italy, 3 - 5 Jul 2013, pp.006
DOI	10.22323/1.189.0006
Subject category	Detectors and Experimental Techniques ; Particle Physics - Experiment
Abstract	GigaTracker, the NA62’s upstream spectrometer, plays a key role in the kinematically constrained background suppression for the study of the K + ! p + n ̄ n decay. It is made of three independent stations, each of which is a six by three cm 2 hybrid silicon pixels detector. To meet the NA62 physics goals, GigaTracker has to address challenging requirements. The hit time resolution must be better than 200 ps while keeping the total thickness of the sensor to less than 0.5 mm silicon equivalent. The 200 μm thick sensor is divided into 18000 300 μm 300 μm pixels bump-bounded to ten independent read-out chips. The chips use an end-of-column architecture and rely on time-over- threshold discriminators. A station can handle a crossing rate of 750 MHz. Microchannel cooling technology will be used to cool the assembly. It allows us to keep the sensor close to 0 C with 130 μm of silicon in the beam area. The sensor and read-out chip performance were validated using a 45 pixel demonstrator with a laser test setup and during a test beam. The time resolution was found to be better than 175 ps, well within the specifications
Copyright/License	publication: © 2014-2025 The Author(s) (License: CC-BY-NC-SA-4.0) CC-BY-NC-SA

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