Radiation resistant innovative 3D pixel sensors for the CMS upgrade at the High Luminosity LHC

Meschini, M.; Cassese, Antonio; Ceccarelli, R.; Viliani, L.; Gennai, S.; Zuolo, D.; Messineo, A.; Parolia, S.; Ebrahimi, A.; Pitzl, D.; Steinbrück, G.; Betta, G.-F. Dalla; Mendicino, R.; Alimonti, G.; Gemme, C.; Boscardin, M.; Ronchin, S.

doi:10.1016/j.nima.2020.164429

Cited by 13 publications

(11 citation statements)

References 4 publications

(4 reference statements)

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“…The measurements presented in this paper have been performed in the DESY II test beam facility [21] using an electron beam with momenta between 1 and 6 GeV, a constant absolute momentum spread of σ p = (158±6) MeV over the full momentum range and divergence d α = 1 mrad. The EUDET-type beam telescope [22] available at the facility has a remarkable track resolution that allows measurements of the spatial resolution along the 25 µm pitch of non-irradiated sensors [5,23]. When measuring the resolution of irradiated sensors, the material in the beam increases due to the additional cooling equipment.…”

Section: Spatial Resolution Measurement Methodsmentioning

confidence: 99%

Position resolution with 25 um pitch pixel sensors before and after irradiation

Zoi,

Ebrahimi,

Feindt

et al. 2021

Preprint

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Pixelated silicon detectors are state-of-the-art technology to achieve precise tracking and vertexing at collider experiments, designed to accurately measure the hit position of incoming particles in high rate and radiation environments. The detector requirements become extremely demanding for operation at the High-Luminosity LHC, where up to 200 interactions will overlap in the same bunch crossing on top of the process of interest. Additionally, fluences up to 2.3 × 10 16 cm −2 1 MeV neutron equivalent at 3.0 cm distance from the beam are expected for an integrated luminosity of 3000 fb −1 . In the last decades, the pixel pitch has constantly been reduced to cope with the experiments' needs of achieving higher position resolution and maintaining low pixel occupancy per channel. The spatial resolution improves with a decreased pixel size but it degrades with radiation damage. Therefore, prototype sensor modules for the upgrade of the experiments at the HL-LHC need to be tested after being irradiated. This paper describes position resolution measurements on planar prototype sensors with 100 × 25 µm 2 pixels for the CMS Phase-2 Upgrade. It reviews the dependence of the position resolution on the relative inclination angle between the incoming particle trajectory and the sensor, the charge threshold applied by the readout chip and the bias voltage. A precision setup with three parallel planes of sensors has been used to investigate the performance of sensors irradiated to fluences up to φ eq = 3.6 × 10 15 cm −2 . The measurements were performed with a 5 GeV electron beam. A spatial resolution of 3.2 ± 0.1 µm is found for non-irradiated sensors, at the optimal angle for charge sharing. The resolution is 5.0 ± 0.2 µm for a proton-irradiated sensor at φ eq = 2.1 × 10 15 cm −2 and a neutron-irradiated sensor at φ eq = 3.6 × 10 15 cm −2 . The extrapolated resolution to infinite beam momentum, where the contribution of multiple scattering can be neglected, has also been evaluated.

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Section: Spatial Resolution Measurement Methodsmentioning

confidence: 99%

Position resolution with 25 um pitch pixel sensors before and after irradiation

Zoi,

Ebrahimi,

Feindt

et al. 2021

Preprint

Self Cite

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“…A hit efficiency > 99% after 2×10 16 n eq /cm 2 has been demonstrated. On the other hand, the first layer of the barrel will be equipped with 3D pixel sensors [7,8] because of the lower high voltage power consumption and good hit resolution up to 1 × 10 16 n eq /cm 2 . At the moment of writing data analysis on the first beam test involving the C-ROC paired to the full final geometry sensors, performed in April/May 2022, is ongoing.…”

Section: Sensorsmentioning

confidence: 99%

The CMS pixel detector for the High Luminosity LHC

Cassese¹

2023

J. Inst.

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The LHC machine will be upgraded to increase its peak luminosity to 5–7.5 × 1034 cm−2 s−1 and to possibly reach an integrated luminosity of 3000–4000 fb−1, with an average number of pileup events of 140–200. The CMS experiment needs to be upgraded to keep up with the new challenges: the unprecedented radiation environment translates to the detector requirement of high resilience, while the increased number of events per bunch crossing requires higher detector granularity. Thus a completely new Inner Tracker will be installed. Design choices for the Inner Tracker Phase-2 upgrade, highlighting R&D activities and technological approaches, will be presented.

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“…The signals from an array of holes are collected by an external electrode (strip). The 3D micro-strips [8] are conceived to better sustain the huge radiation damage of the high luminosity large hadron collider (LHC).…”

Section: Properties and Operation Of Silicon Micro-strip Detectorsmentioning

confidence: 99%

Silicon Micro-Strip Detectors

Landi

Landi²

2021

Encyclopedia

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Silicon micro-strip detectors are fundamental tools for the high energy physics. Each detector is formed by a large set of parallel narrow strips of special surface treatments (diode junctions) on a slab of very high quality silicon crystals. Their development and use required a large amount of work and research. A very synthetic view is given of these important components and of their applications. Some details are devoted to the basic subject of the track reconstruction in silicon strip trackers. Recent demonstrations substantially modified the usual understanding of this argument.

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Radiation resistant innovative 3D pixel sensors for the CMS upgrade at the High Luminosity LHC

Cited by 13 publications

References 4 publications

Position resolution with 25 um pitch pixel sensors before and after irradiation

Position resolution with 25 um pitch pixel sensors before and after irradiation

The CMS pixel detector for the High Luminosity LHC

Silicon Micro-Strip Detectors

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