Serial Powering for the Tracker Phase-2 Upgrade

Koukola, D.

doi:10.22323/1.373.0039

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…The detector design strives for a minimal mass of the detector to avoid degradation of the tracking performance due to the interactions of particles with the detector material. Therefore, lightweight mechanical structures made of carbon fiber, two-phase CO 2 cooling [6] and a low voltage powering scheme based on serial powering [8] will be used. The data will be transmitted through low-mass electrical links and optical fibers [6] to further reduce the detector mass.…”

Section: Jinst 16 P12014mentioning

confidence: 99%

Comparative evaluation of analogue front-end designs for the CMS Inner Tracker at the High Luminosity LHC

et al. 2021

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The CMS Inner Tracker, made of silicon pixel modules, will be entirely replaced prior to the start of the High Luminosity LHC period. One of the crucial components of the new Inner Tracker system is the readout chip, being developed by the RD53 Collaboration, and in particular its analogue front-end, which receives the signal from the sensor and digitizes it. Three different analogue front-ends (Synchronous, Linear, and Differential) were designed and implemented in the RD53A demonstrator chip. A dedicated evaluation program was carried out to select the most suitable design to build a radiation tolerant pixel detector able to sustain high particle rates with high efficiency and a small fraction of spurious pixel hits. The test results showed that all three analogue front-ends presented strong points, but also limitations. The Differential front-end demonstrated very low noise, but the threshold tuning became problematic after irradiation. Moreover, a saturation in the preamplifier feedback loop affected the return of the signal to baseline and thus increased the dead time. The Synchronous front-end showed very good timing performance, but also higher noise. For the Linear front-end all of the parameters were within specification, although this design had the largest time walk. This limitation was addressed and mitigated in an improved design. The analysis of the advantages and disadvantages of the three front-ends in the context of the CMS Inner Tracker operation requirements led to the selection of the improved design Linear front-end for integration in the final CMS readout chip.

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Section: Jinst 16 P12014mentioning

confidence: 99%

Comparative evaluation of analogue front-end designs for the CMS Inner Tracker at the High Luminosity LHC

et al. 2021

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“…The digital modules have been used to construct a serial power chain of four modules in a barrel (ladder) geometry as well as in a ring topology, both shown in Fig. 9 [16]. In the case of the ring, a special flex circuit with two 50 μm aluminium layers has been developed to carry the current from one module to the other.…”

Section: System Testsmentioning

confidence: 99%

The Phase 2 Upgrade of the CMS Inner Tracker

Orfanelli

2020

Nuclear Instruments and Methods in Physics Research Section A:

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A new silicon tracker will be built for the Phase 2 Upgrade of the CMS experiment to fully exploit the increased luminosity delivered by the HL-LHC. The innermost part, called the Inner Tracker, will be exposed to extreme conditions such as unprecedented radiation levels of 1.2 Grad and 2.3×10 16 n /cm 2 and hit rate of 3.2 GHz/cm 2 . The new Inner Tracker relies on many novel solutions and technologies that allow for a design of a light and radiation-hard pixel detector of high performance. The hybrid pixel modules will be composed of pixel sensors with pixel size of 2500 μm 2 and a new ASIC, designed in 65 nm CMOS technology, developed by the RD53 collaboration. A novel scheme of serial powering will be deployed to power the pixel modules and new technologies will be used for a high bandwidth readout system. The mechanics will be lightweight, based on carbon-fibre material and two-phase CO 2 cooling. In this contribution, the design of the CMS Inner Tracker system will be presented along with the prospective design choices.

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Serial Powering for the Tracker Phase-2 Upgrade

Cited by 2 publications

References 4 publications

Comparative evaluation of analogue front-end designs for the CMS Inner Tracker at the High Luminosity LHC

Comparative evaluation of analogue front-end designs for the CMS Inner Tracker at the High Luminosity LHC

The Phase 2 Upgrade of the CMS Inner Tracker

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