ALTIROC 1, a 25 ps time resolution ASIC for the ATLAS High Granularity Timing Detector

Agapopoulou, C.; Dinaucourt, P.; Dragone, Angelo; Gong, D. T.; Taille, C. De La; Makovec, N.; Marković, Bojan; Martin-Chassard, Gisèle; Milke, C. D.; Morenas, M.; Ruckman, L.; Sacerdoti, S.; Schwartzman, A.; Seguin-Moreau, N.; Serin, L.; Su, D.; Ye, J.

doi:10.1109/nss/mic42677.2020.9507972

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…The power budget for these boards is at the level of a few tens of mA and cannot clearly be scaled up for too many channels. For example, ATLAS [ 33 ] and CMS [ 34 ] timing detectors will use dedicated fast pixelated electronics, whose power consumption is about 1 mW/channel, and there continue to be on-going efforts which are not in the scope of the present work. The logical path forward is to integrate the read-out electronics in the same sensor substrate, using CMOS processes, as already happens with MAPS.…”

Section: Discussionmentioning

confidence: 99%

LGAD-Based Silicon Sensors for 4D Detectors

Giacomini

2023

Sensors

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Low-Gain Avalanche Diodes (LGAD) are a class of silicon sensors developed for the fast detection of Minimum Ionizing Particles (MIPs). The development was motivated by the need of resolving piled-up tracks of charged particles emerging from several vertexes originating from the same bunch-crossing in High-Energy Physics (HEP) collider experiments, which, however, are separated not only in space but also in time by a few tens of picoseconds. Built on thin silicon substrates and featuring an internal moderate gain, they provide fast signals for excellent timing performance, which are therefore useful to distinguish the different tracks. Unfortunately, this comes at the price of poor spatial resolution. To overcome this limitation, other families of LGAD-based silicon sensors which can deliver in the same substrate both excellent timing and spatial information are under development. Such devices are, to name a few, capacitively coupled LGADs (AC-LGAD), deep-junction LGADs (DJ-LGAD) and trench-isolated LGADs (TI-LGADs). These devices can be fabricated by even small-scale research-focused clean rooms for faster development within the scientific community. However, to scale up production, efforts towards integrating these sensor concepts in CMOS substrates, with the obvious advantage of the possibility of integrating part of the read-out electronics in the same substrate, have begun.

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Section: Discussionmentioning

confidence: 99%

LGAD-Based Silicon Sensors for 4D Detectors

Giacomini

2023

Sensors

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“…Both collaborations are developing new read-out ASICs for their respective timing layers: ALTIROC [30] designed in 130 nm CMOS technology by ATLAS and ETROC [31] in 65 nm CMS technology by CMS. ALTIROC and ETROC are the first attempts to develop large ASICs (about 2x2 cm 2 ) dedicated to reading LGAD sensors, aiming at a sensor-electronics combined single hit resolution below 50 ps.…”

Section: Standard Lgad and Ti-lgadmentioning

confidence: 99%

4D Tracking: Present Status and Perspective

Cartiglia¹,

Arcidiacono²,

Costa³

et al. 2022

Preprint

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The past ten years have seen the advent of silicon-based precise timing detectors for charged particle tracking. The underlying reason for this evolution is a design innovation: the Low-Gain Avalanche Diode (LGAD). In its simplicity, the LGAD design is an obvious step with momentous consequences: low gain leads to large signals maintaining sensors stability and low noise, allowing sensor segmentation. Albeit introduced for a different reason, to compensate for charge trapping in irradiated silicon sensors, LGAD found fertile ground in the design of silicon-based timing detectors. Spurred by this design innovation, solid-statebased timing detectors for charged particles are going through an intense phase of R&D, and hybrid and monolithic sensors, with or without internal gain, are being explored. This contribution offers a review of this booming field.

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“…ALTIROC1 has been designed on a CMOS 130 nm process and achieves a 25 ps time resolution, with 25 channels per ASIC. Each channel integrates an RF preamplifier, followed by a high speed discriminator and two TDCs for Time-of-Arrival and Time-Over-Threshold measurements, as well as a local memory [27]. The TDC, designed by SLAC, is based on a Cycling Vernier Delay Line with a resolution of 20 ps and a maximum range of 2.5 ns (7 bits dynamic range).…”

Section: Asic Randdmentioning

confidence: 99%

Electronics for Fast Timing

Braga¹,

Carini²,

Deptuch³

et al. 2022

Preprint

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Picosecond-level timing will be an important component of the next generation of particle physics detectors. The ability to add a 4 th dimension to our measurements will help address the increasing complexity of events at hadron colliders and provide new tools for precise tracking and calorimetry for all experiments. Detectors are described in detail on other whitepapers. In this note, we address challenges in electronics design for the new generations of fast timing detectors.

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ALTIROC 1, a 25 ps time resolution ASIC for the ATLAS High Granularity Timing Detector

Cited by 8 publications

References 5 publications

LGAD-Based Silicon Sensors for 4D Detectors

LGAD-Based Silicon Sensors for 4D Detectors

4D Tracking: Present Status and Perspective

Electronics for Fast Timing

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