The VTRx+, an Optical Link Module for Data Transmission at HL-LHC

Troska, J.; Kraxner, Andrea; Brandon-Bravo, Alexander; Détraz, S.; Scarcella, Carmelo; Sigaud, Christophe; Soós, C.; Vasey, F.; Olanterä, Lauri

doi:10.22323/1.313.0048

Cited by 54 publications

(46 citation statements)

References 4 publications

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“…8, is based on the Low power GigaBit Transceiver (LpGBT) [8] that embeds both the up-and down-link to/from the detector. Custom electrical links (e-links) are needed to connect the pixel modules to the specific 'portcards' that host the LpGBT and the optoconverter (VL+) [9]. These portcards are placed on the service cylinder (see Fig.…”

Section: Data Flowmentioning

confidence: 99%

The CMS pixel detector for the high luminosity LHC

Sguazzoni

2020

Nuclear Instruments and Methods in Physics Research Section A:

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The High Luminosity Large Hadron Collider (HL-LHC) at CERN is expected to collide protons at a centre-of-mass energy of 14 TeV and to reach the unprecedented peak instantaneous luminosity of 5 − 7.5 × 10 34 cm −2 s −1 with an average number of pileup events of 140-200. This will allow the ATLAS and CMS experiments to each collect integrated luminosities up to 3000 − 4500 fb −1 during the project lifetime. To cope with this extreme scenario the CMS detector will be substantially upgraded before starting the HL-LHC, a plan known as CMS Phase-2 upgrade. The entire silicon pixel detector will be replaced and the new detector will feature increased radiation hardness, higher granularity and capability to handle higher data rate and longer trigger latency. We present the plans and status of the upgrade pixel detector, focusing on the features of the detector layout and on the development of new pixel devices.

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Section: Data Flowmentioning

confidence: 99%

The CMS pixel detector for the high luminosity LHC

Sguazzoni

2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…They are connected to Concentrator Integrated Circuits (CIC) [4] linked to a Low-power Gigabit Transceiver (LpGBT) [5]. The data is sent out via a Versatile Transceiver Plus module (VTRx+) [6]. This chain will have to cope with mean track densities (MTD) of up to 15 MHz/cm 2 and trigger rates of up to 750 kHz, with up to 200 concurrent inelastic collisions (pile-up, PU).…”

Section: Phase-ii Upgrade Of the Cms Trackermentioning

confidence: 99%

KARATE - a setup for high rate tests on the CMS Outer Tracker 2S module readout chain

Maier¹,

Dierlamm²,

Husemann³

et al. 2020

Proceedings of Topical Workshop on Electronics for Particle Physics — PoS(TWEPP2019)

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KARATE (KArlsruhe high RAte TEst) is a new test system to stress test the readout chain of detector modules for the upgrade of the CMS Outer Tracker for the high-luminosity LHC. Modules consisting of two silicon strip sensors, called 2S modules, are deployed in the outer regions of the Outer Tracker. The readout chain of a 2S module consists of 16 CMS Binary Chips (CBC) each connected to two stacked silicon strip sensors. The CBC contributes data to the first trigger level by identifying particles with large transverse momenta. The output is sparsified on two concentrator chips which in turn are connected to a Gigabit transceiver that prepares the data for output through an optical module. Standard test systems such as test beams or radioactive source measurements need a track reconstruction or do have Gaussian distributed hit profiles and do not reach the occupancy or trigger rates expected in the future Outer Tracker of CMS. KARATE uses a combination of LEDs and photodiodes to inject hit patterns with varying pulse heights, occupancies and trigger rates into the front-end of the CBC, giving full control on 48 channels at 40 MHz. This offers the opportunity to directly compare injection patterns with readout patterns. This contribution introduces the test system and summarizes measurements on a CBC that is read out electrically.

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“…The service hybrids house three main components needed for the operation of the modules in addition to the readout ASICs. In order to ship out the data read out by the readout ASICs and relayed by the CIC chips two components are used: The low-power Gigabit Transceiver (lpGBT) [4] together with the Versatile Link+ (VL+) [5] receive the data transform them from an electrical to an optical signal and transmit them over optical fiber towards the backend electronics. The optical link is bidirectional and will also be used to transmit clock, trigger and fast-commands as well as configuration data to the module.…”

Section: Modules and Front-end Electronicsmentioning

confidence: 99%

The CMS Outer Tracker for the High-Luminosity LHC

Butz

2020

Nuclear Instruments and Methods in Physics Research Section A:

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The era of High-Luminosity Large Hadron Collider will pose unprecedented challenges for detector design and operation. The planned luminosity of the upgraded machine is 5-7.5 × 10 34 cm −2 s −1 , reaching an integrated luminosity of 3000-4000 fb −1 by the end of 2039. The CMS Tracker detector will have to be replaced in order to fully exploit the delivered luminosity and cope with the demanding operating conditions. The new detector will provide robust tracking as well as input for the first level trigger. This report is focusing on the replacement of the CMS Outer Tracker system, describing new layout and technological choices together with some highlights of research and development activities.

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The VTRx+, an Optical Link Module for Data Transmission at HL-LHC

Cited by 54 publications

References 4 publications

The CMS pixel detector for the high luminosity LHC

The CMS pixel detector for the high luminosity LHC

KARATE - a setup for high rate tests on the CMS Outer Tracker 2S module readout chain

The CMS Outer Tracker for the High-Luminosity LHC

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