Charge collection properties of prototype sensors for the LHCb VELO upgrade

R. Geertsema; Kazu Akiba; Martin van Beuzekom; Emma Buchanan; C. Burr; W Byczynski; P Collins; E Dall'Occo; T Evans; V Franco Lima; K. Heijhoff; P Kopciewicz; F Marinho; Eugenia P Price; B Rachwal; Sophie E Richards; Daniel Saunders; H Schindler; H Snoek; T Szumlak; P Tsopelas; Jaap J Velthuis; M.R.J.  Williams

doi:10.1088/1748-0221/16/02/P02029

Charge collection properties of prototype sensors for the LHCb VELO upgrade

R. Geertsema^*, Kazu Akiba, Martin van Beuzekom, Emma Buchanan, C. Burr, W Byczynski, P Collins, E Dall'Occo, T Evans, V Franco Lima, K. Heijhoff, P Kopciewicz, F Marinho, Eugenia P Price, B Rachwal, Sophie E Richards, Daniel Saunders, H Schindler, H Snoek, T SzumlakP Tsopelas, Jaap J Velthuis, M.R.J. Williams

^*Corresponding author for this work

School of Physics

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Abstract

An extensive sensor testing campaign is presented, dedicated to measuring the charge collection properties of prototype candidates for the Vertex Locator (VELO) detector for the upgraded LHCb experiment. The charge collection is measured with sensors exposed to fluences of up to 8×1015 1 MeV neq cm-2, as well as with nonirradiated prototypes. The results are discussed, including the influence of different levels of irradiation and bias voltage on the charge collection properties. Charge multiplication is observed on some sensors that were nonuniformly irradiated with 24 GeV protons, to the highest fluence levels. An analysis of the charge collection near the guard ring region is also presented, revealing significant differences between the sensor prototypes. All tested sensor variants succeed in collecting the minimum required charge of 6000 electrons after the exposure to the maximum fluence.

Original language	English
Article number	P02029
Number of pages	21
Journal	Journal of Instrumentation
Volume	16
Issue number	2
DOIs	https://doi.org/10.1088/1748-0221/16/02/P02029
Publication status	Published - 23 Feb 2021

Bibliographical note

Publisher Copyright:
© 2021 CERN.

Keywords

Radiation-hard detectors
Radiation damage to detector materials (solid state)
Hybrid detectors
Solid state detectors

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10.1088/1748-0221/16/02/P02029

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Bristol Consolidated Grant 2015-9
Goldstein, J. (Principal Investigator)
1/10/15 → 31/03/21
Project: Research

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Geertsema, R., Akiba, K., van Beuzekom, M., Buchanan, E., Burr, C., Byczynski, W., Collins, P., Dall'Occo, E., Evans, T., Franco Lima, V., Heijhoff, K., Kopciewicz, P., Marinho, F., Price, E. P., Rachwal, B., Richards, S. E., Saunders, D., Schindler, H., Snoek, H., ... Williams, M. R. J. (2021). Charge collection properties of prototype sensors for the LHCb VELO upgrade. Journal of Instrumentation, 16(2), Article P02029. https://doi.org/10.1088/1748-0221/16/02/P02029

@article{b58f0bd1227b497585ec092a61ccd3ea,

title = "Charge collection properties of prototype sensors for the LHCb VELO upgrade",

abstract = "An extensive sensor testing campaign is presented, dedicated to measuring the charge collection properties of prototype candidates for the Vertex Locator (VELO) detector for the upgraded LHCb experiment. The charge collection is measured with sensors exposed to fluences of up to 8×1015 1 MeV neq cm-2, as well as with nonirradiated prototypes. The results are discussed, including the influence of different levels of irradiation and bias voltage on the charge collection properties. Charge multiplication is observed on some sensors that were nonuniformly irradiated with 24 GeV protons, to the highest fluence levels. An analysis of the charge collection near the guard ring region is also presented, revealing significant differences between the sensor prototypes. All tested sensor variants succeed in collecting the minimum required charge of 6000 electrons after the exposure to the maximum fluence.",

keywords = "Radiation-hard detectors, Radiation damage to detector materials (solid state), Hybrid detectors, Solid state detectors",

author = "R. Geertsema and Kazu Akiba and {van Beuzekom}, Martin and Emma Buchanan and C. Burr and W Byczynski and P Collins and E Dall'Occo and T Evans and {Franco Lima}, V and K. Heijhoff and P Kopciewicz and F Marinho and Price, {Eugenia P} and B Rachwal and Richards, {Sophie E} and Daniel Saunders and H Schindler and H Snoek and T Szumlak and P Tsopelas and Velthuis, {Jaap J} and M.R.J. Williams",

note = "Publisher Copyright: {\textcopyright} 2021 CERN.",

year = "2021",

month = feb,

day = "23",

doi = "10.1088/1748-0221/16/02/P02029",

language = "English",

volume = "16",

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Geertsema, R, Akiba, K, van Beuzekom, M, Buchanan, E, Burr, C, Byczynski, W, Collins, P, Dall'Occo, E, Evans, T, Franco Lima, V, Heijhoff, K, Kopciewicz, P, Marinho, F, Price, EP, Rachwal, B, Richards, SE, Saunders, D, Schindler, H, Snoek, H, Szumlak, T, Tsopelas, P, Velthuis, JJ & Williams, MRJ 2021, 'Charge collection properties of prototype sensors for the LHCb VELO upgrade', Journal of Instrumentation, vol. 16, no. 2, P02029. https://doi.org/10.1088/1748-0221/16/02/P02029

TY - JOUR

T1 - Charge collection properties of prototype sensors for the LHCb VELO upgrade

AU - Geertsema, R.

AU - Akiba, Kazu

AU - van Beuzekom, Martin

AU - Buchanan, Emma

AU - Burr, C.

AU - Byczynski, W

AU - Collins, P

AU - Dall'Occo, E

AU - Evans, T

AU - Franco Lima, V

AU - Heijhoff, K.

AU - Kopciewicz, P

AU - Marinho, F

AU - Price, Eugenia P

AU - Rachwal, B

AU - Richards, Sophie E

AU - Saunders, Daniel

AU - Schindler, H

AU - Snoek, H

AU - Szumlak, T

AU - Tsopelas, P

AU - Velthuis, Jaap J

AU - Williams, M.R.J.

PY - 2021/2/23

Y1 - 2021/2/23

N2 - An extensive sensor testing campaign is presented, dedicated to measuring the charge collection properties of prototype candidates for the Vertex Locator (VELO) detector for the upgraded LHCb experiment. The charge collection is measured with sensors exposed to fluences of up to 8×1015 1 MeV neq cm-2, as well as with nonirradiated prototypes. The results are discussed, including the influence of different levels of irradiation and bias voltage on the charge collection properties. Charge multiplication is observed on some sensors that were nonuniformly irradiated with 24 GeV protons, to the highest fluence levels. An analysis of the charge collection near the guard ring region is also presented, revealing significant differences between the sensor prototypes. All tested sensor variants succeed in collecting the minimum required charge of 6000 electrons after the exposure to the maximum fluence.

AB - An extensive sensor testing campaign is presented, dedicated to measuring the charge collection properties of prototype candidates for the Vertex Locator (VELO) detector for the upgraded LHCb experiment. The charge collection is measured with sensors exposed to fluences of up to 8×1015 1 MeV neq cm-2, as well as with nonirradiated prototypes. The results are discussed, including the influence of different levels of irradiation and bias voltage on the charge collection properties. Charge multiplication is observed on some sensors that were nonuniformly irradiated with 24 GeV protons, to the highest fluence levels. An analysis of the charge collection near the guard ring region is also presented, revealing significant differences between the sensor prototypes. All tested sensor variants succeed in collecting the minimum required charge of 6000 electrons after the exposure to the maximum fluence.

KW - Radiation-hard detectors

KW - Radiation damage to detector materials (solid state)

KW - Hybrid detectors

KW - Solid state detectors

U2 - 10.1088/1748-0221/16/02/P02029

DO - 10.1088/1748-0221/16/02/P02029

M3 - Article (Academic Journal)

SN - 1748-0221

VL - 16

JO - Journal of Instrumentation

JF - Journal of Instrumentation

IS - 2

M1 - P02029

ER -

Charge collection properties of prototype sensors for the LHCb VELO upgrade

Abstract

Bibliographical note

Keywords

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Projects

Bristol Consolidated Grant 2015-9

Cite this