Charge collection characterisation with the Transient Current Technique of the ams H35DEMO CMOS detector after proton irradiation

Anders, J. K.; Benoit, M.; Braccini, S.; Casanova, R.; Chen, Hongey; Chen, K.; Bello, F. A. Di; Fehr, A.; Ferrère, D.; Forshaw, D. C.; Golling, T.; González-Sevilla, S.; Iacobucci, G.; Kiehn, M.; Lanni, F.; Liu, H.; Meng, L.; Merlassino, C.; Miucci, A.; Nessi, M.; Perić, I.; Rimoldi, M.; Sultan, D. M. S.; Pinto, M. Vicente Barreto; Figueras, E. Vilella; Weber, M.; Weston, T. D.; Wu, W.; Li, Xu; Zaffaroni, E.

doi:10.1088/1748-0221/13/10/p10004

Cited by 8 publications

(8 citation statements)

References 11 publications

(15 reference statements)

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“…A larger efficiency is instead measured in the chip irradiated with protons to 1 × 10 15 n eq /cm 2 with respect to the one irradiated with neutrons to the same fluence despite the higher threshold of the first one. This can be explained by the larger depletion depth which is obtained with proton irradiation with respect to neutron irradiation as observed in TCT measurements due to acceptor removal effect [22]. For almost all irradiated samples up to 1 × 10 15 n eq /cm 2 the same efficiency as measured before irradiation is recovered with a bias voltage of 150 V. The only exception is the H7 sensor irradiated with protons for which the measurements were limited to 120 V by the lower breakdown voltage.…”

Section: Efficiency After Irradiationmentioning

confidence: 87%

Characterisation of AMS H35 HV-CMOS monolithic active pixel sensor prototypes for HEP applications

et al. 2019

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A: Monolithic Active Pixel Sensors (MAPS) produced in High Voltage CMOS (HV-CMOS) technology are being considered for High Energy Physics applications due to the ease of production and the reduced costs. Such technology is especially appealing when large areas to be covered and material budget are concerned. This is the case of the outermost pixel layers of the future ATLAS tracking detector for the High Luminosity LHC. For experiments at hadron colliders, radiation hardness is a key requirement which is not fulfilled by standard CMOS sensor designs that collect charge by diffusion. This issue has been addressed by depleted active pixel sensors in which electronics are embedded into a large deep implantation ensuring uniform charge collection by drift. Very first small prototypes of hybrid depleted active pixel sensors have already shown a radiation hardness compatible with the ATLAS requirements. Nevertheless, to compete with the present hybrid solutions a further reduction in costs achievable by a fully monolithic design is desirable. The H35DEMO is a large electrode full reticle demonstrator chip produced in AMS 350 nm HV-CMOS technology by the collaboration . It includes two large monolithic pixel matrices which can be operated standalone. One of these two matrices was characterised at beam test before and after irradiation with protons and neutrons. Results demonstrated the feasibility of producing radiation hard large area fully monolithic pixel sensors in HV-CMOS technology. H35DEMO chips with a substrate resistivity of 200 Ωcm irradiated with neutrons showed a radiation hardness up to a fluence of 1 × 10 15 n eq /cm 2 with a hit efficiency of about 99 % and a noise occupancy lower than 10 −6 hits in a LHC bunch crossing of 25 ns at 150 V.

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Section: Efficiency After Irradiationmentioning

confidence: 87%

Characterisation of AMS H35 HV-CMOS monolithic active pixel sensor prototypes for HEP applications

et al. 2019

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“…The Bern Medical Cyclotron is involved in the qualification of new sensor technologies, as well as other materials, in view of the detector upgrades for the High-Luminosity LHC. As an example, the radiation hardness of high-voltage CMOS pixel sensors has been tested to a fluence of 1.9 × 10 15 n eq /cm 2 [31,32]. Currently, an extensive irradiation campaign is ongoing, aiming to validate the radiation tolerance of the data transmission chain [33] for the read-out of the Inner Tracker (ITk) pixel detector of the ATLAS experiment [34].…”

Section: Examples Of Irradiation Campaignsmentioning

confidence: 99%

A facility for radiation hardness studies based on a medical cyclotron

Anders¹,

Braccini²,

Carzaniga³

et al. 2022

J. Inst.

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The development of instrumentation for operation in high-radiation environments represents a challenge in various research fields, particularly in particle physics experiments and space missions, and drives an ever-increasing demand for irradiation facilities dedicated to radiation hardness studies. Depending on the application, different needs arise in terms of particle type, energy and dose rate. In this article, we present a versatile installation based on a medical cyclotron located at the Bern University Hospital (Inselspital), which is used as a controlled 18-MeV proton source. This accelerator is used for daily production of medical radioisotopes, as well as for multidisciplinary research, thanks to a 6.5-meter long beam transfer line that terminates in an independent bunker, dedicated only to scientific activities. The facility offers a wide range of proton fluxes, due to an adjustable beam current from approximately 10 pA to the micro-ampere range, together with a series of steering and focusing magnets along the beamline that allow for the beam spot to be focused down to a few mm^2. The beamline can be instrumented with a variety of beam monitoring detectors, collimators, and beam current measurement devices to precisely control the irradiation conditions. The facility also hosts a well equipped laboratory dedicated to the characterisation of samples after irradiation. An experimental validation of the irradiation setup, with proton fluxes ranging from 5×10^9 cm^-2s^-1 to 4×10^11 cm^-2s^-1, is reported.

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“…The Bern Medical Cyclotron is involved in the qualification of new sensor technologies, as well as other materials, in view of the detector upgrades for the High-Luminosity LHC. As an example, the radiation hardness of high-voltage CMOS pixel sensors has been tested to a fluence of 1.9 × 10 15 1 MeVn eq /cm 2 [30] [31]. Currently, an extensive irradiation campaign is ongoing, aiming to validate the radiation tolerance of the data transmission chain [32] for the read-out of the Inner Tracker (ITk) pixel detector of the ATLAS experiment [33].…”

Section: Examples Of Irradiation Campaignsmentioning

confidence: 99%

A facility for radiation hardness studies based on a medical cyclotron

Anders,

Braccini,

Carzaniga

et al. 2022

Preprint

View full text Add to dashboard Cite

The development of instrumentation for operation in high-radiation environments represents a challenge in various research fields, particularly in particle physics experiments and space missions, and drives an ever-increasing demand for irradiation facilities dedicated to radiation hardness studies. Depending on the application, different needs arise in terms of particle type, energy and dose rate. In this article, we present a versatile installation based on a medical cyclotron located at the Bern University Hospital (Inselspital), which is used as a controlled 18-MeV proton source. This accelerator is used for daily production of medical radioisotopes, as well as for multidisciplinary research, thanks to a 6.5-meter long beam transfer line that terminates in an independent bunker, dedicated only to scientific activities. The facility offers a wide range of proton fluxes, due to an adjustable beam current from approximately 10 pA to the micro-ampere range, together with a series of steering and focusing magnets along the beamline that allow for the beam spot to be focused down to a few mm 2 . The beamline can be instrumented with a variety of beam monitoring detectors, collimators, and beam current measurement devices to precisely control the irradiation conditions. The facility also hosts a well equipped laboratory dedicated to the characterisation of samples after irradiation. An experimental validation of the irradiation setup, with proton fluxes ranging from 5 × 10 9 cm −2 s −1 to 4 × 10 11 cm −2 s −1 , is reported in this article.

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Charge collection characterisation with the Transient Current Technique of the ams H35DEMO CMOS detector after proton irradiation

Cited by 8 publications

References 11 publications

Characterisation of AMS H35 HV-CMOS monolithic active pixel sensor prototypes for HEP applications

Characterisation of AMS H35 HV-CMOS monolithic active pixel sensor prototypes for HEP applications

A facility for radiation hardness studies based on a medical cyclotron

A facility for radiation hardness studies based on a medical cyclotron

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