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Publication > 'Charge collection from proton and alpha particle tracks in silicon pixel detector devices'

Charge collection from proton and alpha particle tracks in silicon pixel detector devices

Author

Campbell Michael	CERN
Havránek V.	Nuclear Physics Institute of the AS CR
Erik Heijne	CERN
Holý Tomáš, Ing.	IEAP
Idarraga John	University of Montreal
Jakůbek Jan, Ing. PhD.	IEAP
Celine Lebel	University of Montreal, Canada
Claude Leroy	University of Montreal, Canada
Llopart Xavier	CERN
Novotný J.	Nuclear Physics Institute of the AS CR
Pospíšil Stanislav, DrSc. Ing.	IEAP
Tlustos Lukas	CERN
Vykydal Zdeněk, Ing.	IEAP

Year

2007

Scientific journal

2007 IEEE Nuclear Science Symposium Conference Record, Pages: 1047-1050, doi: 10.1109/NSSMIC.2007.4437190

Web

http://dx.doi.org/10.1109/NSSMIC.2007.4437190

Abstract

The lateral spread of charge carriers under the influence of the electric field in a pixellated silicon detector hit by a heavy charged particle, such as a proton or an alpha-particle, causes a sharing of the charge between the electrodes and many pixels have a signal. The results of the charge sharing effect measured in the Medipix2 and Timepix pixel detectors of 300 μm thicknesses is shown as a function of particle energy and applied bias voltage. A model describing the effects of funneling, plasma and diffusion on the charge collection and its sharing will be also presented. Using Timepix, it is possible to measure directly the quantity of charge deposited in each pixel within the cluster and to follow changes in charge collection as a function of collection time. This allows 3D-visualization of individual tracks of charged particles in silicon with Timepix.

Grants

1P04LA211	Collaboration Czech Republic with CERN
MSM 6840770029	Fundamental Experiments in the Physics of the Microworld
1P04LA212	Experiment ATLAS for LHC at CERN
LC06041	Research center "Fabrication, modification and characterization of materials by energetic radiation"

Projects

ATLAS-Medipix project

Cite article as:

M. Campbell, V. Havránek, H. Erik, T. Holý, J. Idarraga, J. Jakůbek, L. Celine, L. Claude, X. Llopart, J. Novotný, S. Pospíšil, L. Tlustos, Z. Vykydal, "Charge collection from proton and alpha particle tracks in silicon pixel detector devices", 2007 IEEE Nuclear Science Symposium Conference Record, Pages: 1047-1050, doi: 10.1109/NSSMIC.2007.4437190 (2007)