ATLAS ITk Pixel Detector Overview

Meng, Lingxin

doi:10.48550/arxiv.2105.10367

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…In order to deal with the more challenging pile-up conditions, the ITk will guarantee a higher tracking resolution with respect to the ID, and this is possible thanks to the higher granularity: the total number of channels of pixel and strip subdetectors will pass from ∼10 8 to 5 × 10 9 [7]. The ITk will be read-out at a speed of 1 MHz, meaning that a total of 50 Tbps will be sent from the detector to the off-detector data acquisition system.…”

Section: The Atlas Itk Pixel Detectormentioning

confidence: 99%

Test of the Optosystem for the ATLAS ITk data transmission chain

Santo¹,

O’Neill²,

Franconi³

et al. 2023

J. Inst.

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After Run III the ATLAS detector will undergo a series of upgrades to cope with the harsher radiation environment and increased number of proton interactions in the High Luminosity LHC. One of the key projects in this suite of upgrades is the ATLAS Inner Tracker (ITk). The pixel detector of the ITk must be read out accurately and with extremely high rate. The Optosystem performs electrical-to-optical conversion of signals from the pixel modules. We present a general overview on the design of the Optosystem and recent results related to the performance of the data transmission chain, pivoted on the Optoboards, and to the radiation hardness of the ASICs housed on it.

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Section: The Atlas Itk Pixel Detectormentioning

confidence: 99%

Test of the Optosystem for the ATLAS ITk data transmission chain

Santo¹,

O’Neill²,

Franconi³

et al. 2023

J. Inst.

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“…The current detector components that are very close to the collision points, such as the tracking detectors, are not radiation-hard enough to ensure full functionality over the lifetime of the HL-LHC. Therefore, the development of more radiation-hard detectors is required, such as the new all-silicon ATLAS Inner Tracker (ITk) that will replace the Inner Detector [3,4].…”

Section: High-luminosity Lhc and The Atlas Itk Upgradementioning

confidence: 99%

“…From this simulation, we extract the expected radiation dose for the components depending on their z-and r-location in the detector. The components in the innermost regions, such as the ATLAS-ITk Pixel detector located between 3.4 cm and 33 cm in r-and 0 cm and 285 cm in z-direction, are exposed to the highest doses up to 10 MGy [2,4].…”

Section: Irradiation Campaignsmentioning

confidence: 99%

Irradiation studies at the Bern cyclotron for the ATLAS ITk upgrade

Halser

2022

J. Phys.: Conf. Ser.

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At the high-luminosity LHC, the radiation levels for participating experiments will increase by over one order of magnitude in total ionising dose compared to current levels. Therefore, components and materials installed closest to the interaction points, such as the new ATLAS Inner Tracker (ITk), have to be tested for their durability in high-radiation environments. The variety and multitude of materials and components require a large number of irradiation campaigns. For this purpose, the irradiation facility at the Bern medical cyclotron, an 18MeV proton accelerator, can be utilised. The laboratory setup allows for studies of radiation hardness of different samples, such as cables, connectors, electronics, and shielding materials. Two campaigns were completed with the conclusion that the materials do not significantly worsen their performance, while the third campaign presented here is still ongoing.

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“…The Large Hadron Collider (LHC) will experience an upgrade in the near future and step into the High Luminosity LHC (HL-LHC) era, in which the average number of proton–proton interactions per bunch crossing for the ATLAS experiment will increase to 140–200, and the integrated luminosity at the end of the ATLAS and CMS experiments is estimated to be 4000

[ 1 ]. The double-sided 3D pixel detectors currently under operation in the ATLAS pixel Insertable B-Layer (IBL), which represent the radiation-hardest solution in practice at the moment [ 2 ], are not compatible with the HL-LHC scenario.…”

Section: Introductionmentioning

confidence: 99%

TCAD Analysis of Leakage Current and Breakdown Voltage in Small Pitch 3D Pixel Sensors

Boughedda

Sultan

et al. 2023

Sensors

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Small-pitch 3D pixel sensors have been developed to equip the innermost layers of the ATLAS and CMS tracker upgrades at the High Luminosity LHC. They feature 50 × 50 and 25 × 100 μm2 geometries and are fabricated on p-type Si–Si Direct Wafer Bonded substrates of 150 μm active thickness with a single-sided process. Due to the short inter-electrode distance, charge trapping effects are strongly mitigated, making these sensors extremely radiation hard. Results from beam test measurements of 3D pixel modules irradiated at large fluences (1016neq/cm2) indeed demonstrated high efficiency at maximum bias voltages of the order of 150 V. However, the downscaled sensor structure also lends itself to high electric fields as the bias voltage is increased, meaning that premature electrical breakdown due to impact ionization is a concern. In this study, TCAD simulations incorporating advanced surface and bulk damage models are used to investigate the leakage current and breakdown behavior of these sensors. Simulations are compared with measured characteristics of 3D diodes irradiated with neutrons at fluences up to 1.5 × 1016neq/cm2. The dependence of the breakdown voltage on geometrical parameters (e.g., the n+ column radius and the gap between the n+ column tip and the highly doped p++ handle wafer) is also discussed for optimization purposes.

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ATLAS ITk Pixel Detector Overview

Cited by 3 publications

References 5 publications

Test of the Optosystem for the ATLAS ITk data transmission chain

Test of the Optosystem for the ATLAS ITk data transmission chain

Irradiation studies at the Bern cyclotron for the ATLAS ITk upgrade

TCAD Analysis of Leakage Current and Breakdown Voltage in Small Pitch 3D Pixel Sensors

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