A method for precise charge reconstruction with pixel detectors using binary hit information

A method is presented to precisely reconstruct charge spectra with pixel detectors using binary hit information of individual pixels. The method is independent of the charge information provided by the readout circuitry and has a resolution mainly limited by the electronic noise. It relies on the ab...

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Detalles Bibliográficos
Autores principales: Pohl, David-Leon, Janssen, Jens, Hemperek, Tomasz, Hügging, Fabian, Wermes, Norbert
Lenguaje:eng
Publicado: 2014
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2015.03.067
http://cds.cern.ch/record/1750164
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author Pohl, David-Leon
Janssen, Jens
Hemperek, Tomasz
Hügging, Fabian
Wermes, Norbert
author_facet Pohl, David-Leon
Janssen, Jens
Hemperek, Tomasz
Hügging, Fabian
Wermes, Norbert
author_sort Pohl, David-Leon
collection CERN
description A method is presented to precisely reconstruct charge spectra with pixel detectors using binary hit information of individual pixels. The method is independent of the charge information provided by the readout circuitry and has a resolution mainly limited by the electronic noise. It relies on the ability to change the detection threshold in small steps while counting hits from a particle source. The errors are addressed and the performance of the method is shown based on measurements with the ATLAS pixel chip FE-I4 bump bonded to a 230 {\mu}m 3D-silicon sensor. Charge spectra from radioactive sources and from electron beams are presented serving as examples. It is demonstrated that a charge resolution ({\sigma}<200 e) close to the electronic noise of the ATLAS FE-I4 pixel chip can be achieved.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
record_format invenio
spelling cern-17501642023-03-12T04:14:38Zdoi:10.1016/j.nima.2015.03.067http://cds.cern.ch/record/1750164engPohl, David-LeonJanssen, JensHemperek, TomaszHügging, FabianWermes, NorbertA method for precise charge reconstruction with pixel detectors using binary hit informationDetectors and Experimental TechniquesA method is presented to precisely reconstruct charge spectra with pixel detectors using binary hit information of individual pixels. The method is independent of the charge information provided by the readout circuitry and has a resolution mainly limited by the electronic noise. It relies on the ability to change the detection threshold in small steps while counting hits from a particle source. The errors are addressed and the performance of the method is shown based on measurements with the ATLAS pixel chip FE-I4 bump bonded to a 230 {\mu}m 3D-silicon sensor. Charge spectra from radioactive sources and from electron beams are presented serving as examples. It is demonstrated that a charge resolution ({\sigma}<200 e) close to the electronic noise of the ATLAS FE-I4 pixel chip can be achieved.The ATLAS FE-I4 pixel readout chip is a 2×2cm2 state-of-the-art ASIC that is used in high-energy physics experiments and for research and development purposes. It is optimized for high hit rates and radiation hardness, but it provides only limited charge resolution. Therefore, a method generally used for the characterization of binary readout chips is presented and applied to the FE-I4 to obtain spectroscopic information with high resolution. The method relies on the ability to change the detection threshold in small steps, while measuring the particle rate, in order to record the integrated single pixel charge-spectra. The challenges resulting from the large number of channels (28,880), such as inhomogeneous threshold, low statistics per pixel and effects of charge sharing, are discussed. Charge spectra of an ATLAS FE-I4 bump bonded to a 230 μm 3D-silicon sensor from radioactive sources and electron beams are analyzed and presented. The results show that a charge resolution close to the electronic noise can be achieved proving the potential of this approach.A method is presented to precisely reconstruct charge spectra with pixel detectors using binary hit information of individual pixels. The method is independent of the charge information provided by the readout circuitry and has a resolution mainly limited by the electronic noise. It relies on the ability to change the detection threshold in small steps while counting hits from a particle source. The errors are addressed and the performance of the method is shown based on measurements with the ATLAS pixel chip FE-I4 bump bonded to a 230 {\mu}m 3D-silicon sensor. Charge spectra from radioactive sources and from electron beams are presented serving as examples. It is demonstrated that a charge resolution ({\sigma}<200 e) close to the electronic noise of the ATLAS FE-I4 pixel chip can be achieved.arXiv:1408.2952oai:cds.cern.ch:17501642014-08-13
spellingShingle Detectors and Experimental Techniques
Pohl, David-Leon
Janssen, Jens
Hemperek, Tomasz
Hügging, Fabian
Wermes, Norbert
A method for precise charge reconstruction with pixel detectors using binary hit information
title A method for precise charge reconstruction with pixel detectors using binary hit information
title_full A method for precise charge reconstruction with pixel detectors using binary hit information
title_fullStr A method for precise charge reconstruction with pixel detectors using binary hit information
title_full_unstemmed A method for precise charge reconstruction with pixel detectors using binary hit information
title_short A method for precise charge reconstruction with pixel detectors using binary hit information
title_sort method for precise charge reconstruction with pixel detectors using binary hit information
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1016/j.nima.2015.03.067
http://cds.cern.ch/record/1750164
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