A pixel detector asic for dosimetry using time-over-threshold energy measurements
In this work we present the design of a chip which provides the readout of a highly segmented diode array, in which signals induced by individual X-ray photons are processed discretely. There are several benefits to this approach, including the ability to achieve a high signal to noise ratio due to...
Autores principales: | , , , , , , , , , , , , , |
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Publicado: |
2011
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.radmeas.2011.06.061 http://cds.cern.ch/record/1447124 |
_version_ | 1780924816721707008 |
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author | Wong, W S Anton, G Ballabriga, R Bohnel, M Campbell, M Heijne, E Llopart, X Michel, T Munster, I Plackett, R Sievers, P Takoukam, P Tlustos, L Valerio, P |
author_facet | Wong, W S Anton, G Ballabriga, R Bohnel, M Campbell, M Heijne, E Llopart, X Michel, T Munster, I Plackett, R Sievers, P Takoukam, P Tlustos, L Valerio, P |
author_sort | Wong, W S |
collection | CERN |
description | In this work we present the design of a chip which provides the readout of a highly segmented diode array, in which signals induced by individual X-ray photons are processed discretely. There are several benefits to this approach, including the ability to achieve a high signal to noise ratio due to the inherently low sensor capacitance, and the suppression of background noise (e.g. dark current) using an analogue threshold. The segmentation also ensures a linear behaviour even at very high dose rates. A time over threshold (ToT) energy measurement technique provides an immediate digital value corresponding to the energy deposited onto the diode by each individual photon. Deadtime-free operation is achieved by reading out a subset of the detector segments at a time while the rest of the detector continues to process signals. This paper describes the application-specific integrated circuit (ASIC) chip which was designed to provide pre-processing of photo-induced signals in the detector and readout of the processed digital data. |
id | cern-1447124 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2011 |
record_format | invenio |
spelling | cern-14471242019-09-30T06:29:59Zdoi:10.1016/j.radmeas.2011.06.061http://cds.cern.ch/record/1447124Wong, W SAnton, GBallabriga, RBohnel, MCampbell, MHeijne, ELlopart, XMichel, TMunster, IPlackett, RSievers, PTakoukam, PTlustos, LValerio, PA pixel detector asic for dosimetry using time-over-threshold energy measurementsDetectors and Experimental TechniquesIn this work we present the design of a chip which provides the readout of a highly segmented diode array, in which signals induced by individual X-ray photons are processed discretely. There are several benefits to this approach, including the ability to achieve a high signal to noise ratio due to the inherently low sensor capacitance, and the suppression of background noise (e.g. dark current) using an analogue threshold. The segmentation also ensures a linear behaviour even at very high dose rates. A time over threshold (ToT) energy measurement technique provides an immediate digital value corresponding to the energy deposited onto the diode by each individual photon. Deadtime-free operation is achieved by reading out a subset of the detector segments at a time while the rest of the detector continues to process signals. This paper describes the application-specific integrated circuit (ASIC) chip which was designed to provide pre-processing of photo-induced signals in the detector and readout of the processed digital data.oai:cds.cern.ch:14471242011 |
spellingShingle | Detectors and Experimental Techniques Wong, W S Anton, G Ballabriga, R Bohnel, M Campbell, M Heijne, E Llopart, X Michel, T Munster, I Plackett, R Sievers, P Takoukam, P Tlustos, L Valerio, P A pixel detector asic for dosimetry using time-over-threshold energy measurements |
title | A pixel detector asic for dosimetry using time-over-threshold energy measurements |
title_full | A pixel detector asic for dosimetry using time-over-threshold energy measurements |
title_fullStr | A pixel detector asic for dosimetry using time-over-threshold energy measurements |
title_full_unstemmed | A pixel detector asic for dosimetry using time-over-threshold energy measurements |
title_short | A pixel detector asic for dosimetry using time-over-threshold energy measurements |
title_sort | pixel detector asic for dosimetry using time-over-threshold energy measurements |
topic | Detectors and Experimental Techniques |
url | https://dx.doi.org/10.1016/j.radmeas.2011.06.061 http://cds.cern.ch/record/1447124 |
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