The Versatile Link common project: feasibility report

Vasey, F.; Hall, David C.; Huffman, T. B.; Kwan, S.; Prosser, A.; Soós, C.; Troska, J.; Weidberg, T.; Xiang, Annie C.; Ye, J

doi:10.1088/1748-0221/7/01/c01075

Cited by 51 publications

(57 citation statements)

References 14 publications

(22 reference statements)

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“…Figure 2 shows the three configurations of VTRx+ based upon such an optical coupling block and the use of the LDQ10 laser driver [2] and the GBTIA [3]. Although the GBTIA was designed for the Versatile Link project [4,5] for operation at 4.8 Gb/s when packaged with a PD directly into a TO-can based ROSA, it is possible to use it in a single-channel configuration for the VTRx+. One of the critical parameters of the VTRx+ for a number of the end users is its height.…”

Section: Pos(twepp-17)048mentioning

confidence: 99%

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

Troska¹,

Kraxner²,

Brandon-Bravo³

et al. 2018

Proceedings of Topical Workshop on Electronics for Particle Physics — PoS(TWEPP-17)

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Optical data transmission will remain a key enabling technology for the upgrading detectors at HL-LHC. In particular the inner tracking detectors will require low-mass, radiation tolerant optical transmit and receive modules for tight integration in the detector front-ends. We describe the development of such a module, giving details of the design, functional and environmental performance, as well as showing the feasibility of achieving small size, low-mass, and low-power operation.

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Section: Pos(twepp-17)048mentioning

confidence: 99%

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

Troska¹,

Kraxner²,

Brandon-Bravo³

et al. 2018

Proceedings of Topical Workshop on Electronics for Particle Physics — PoS(TWEPP-17)

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“…I also worked within the Versatile Link project [16] to investigate radiation hardened optical components for the HL-LHC. As this research does not easily relate to the Higgs boson, it is excluded from this thesis.…”

Section: Prefacementioning

confidence: 99%

Discovery and Measurement of the Higgs Boson in the WW Decay Channel

Hall¹

2015

Springer Theses

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In the Standard Model of particle physics, the non-zero masses of the W and Z bosons and the fermions are generated through interactions with the Higgs field, excitations of which correspond to Higgs bosons. Thus, the experimental discovery of the Higgs boson is of prime importance to physics, and would confirm our understanding of fundamental mass generation.This thesis describes a search for the gg → H → W W → ν ν process of Higgs boson production and decay. It uses the LHC Run I dataset of pp collisions recorded by the ATLAS detector, which corresponds to an integrated luminosity of 4.5 fb −1 at √ s = 7 TeV and 20.3 fbTeV. An excess of events is observed with a significance of 4.8 standard deviations, which is consistent with Higgs boson production. The significance is extended to 6.1 standard deviations when the vector boson fusion production process is included. The measured signal strength is 1.11−0.21 at m H = 125 GeV. A cross section measurement of W W production, a major background to this search, is also presented using the √ s = 7 TeV dataset only.iii PrefaceAs a DPhil research topic, the H → W W analysis has proven to be a baptism of fire. It is the most complicated of the three "discovery channels", 1 as it involves a variety of physics objects and requires a good understanding of many difficult backgrounds. As such, the analysis took huge effort from a large number of individuals. My role focussed on theoretical aspects of the signal and background modelling, and these parts shall be emphasised. I contributed to multiple iterations of the analysis [1][2][3][4][5][6][7][8], though the version presented here is unpublished at the time of writing [9]. I also co-authored the third Yellow Report produced by the LHC Higgs Cross Section Working Group [10].When I began the degree in October 2010, there was no direct evidence for a Higgs boson. This thesis is written from a personal perspective and motivates a low mass search by electroweak fits, when in fact this aspect was motivated later by observations of a resonance in the γγ and ZZ channels.2 Also, an advanced search strategy is described, though the discovery of H → W W was actually a gradual process with multiple iterations of blinding, optimising and unblinding the analysis. As more data were recorded and the analysis was enhanced, the results improved.Early on, I gained relevant insight by performing multiple W W cross section measurements [12][13][14][15]. My main contribution was a jet veto correction factor applied to the W W signal, which reduces the dominant uncertainty in the analysis. This measurement shall be described when considering the W W background to the H → W W search.To qualify for authorship within the ATLAS collaboration, I performed Run Control shifts. I also worked within the Versatile Link project [16] to investigate radiation hardened optical components for the HL-LHC. As this research does not easily relate to the Higgs boson, it is excluded from this thesis. However, I have published articles on the radiation toler...

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“…The upgrade FEE plans include the use of the GBT and Versatile Link technologies, under development at CERN [50,51]. These technologies are tolerant to radiation levels greater than the HCAL exposure levels.…”

Section: Gigabit Transceiver (Gbt)mentioning

confidence: 99%

“…The optocouplers are needed to provide electrical isolation, but essentially all optocouplers are sensitive to SET, so for the upgrade we will use the twisted pair patch cable for driving static electrical levels, which can be easily made immune from SETs with low-pass filters. In the upgrade, fast control and slow control will be merged and implemented over 4.8 Gbps bidirectional GBT links [50,51]. The two existing single-mode fibers are expected to work at this data rate without problems (J. Troska, private communication).…”

Section: Provide Reset Capabilities For the Fe (Reset)mentioning

confidence: 99%

“…The redundant links will use optical fibers in order to avoid any problem of ground loops and of tolerance to magnetic fields. The requirements on the optoelectronic parts are compatible with developments from the Versatile Link project [51], in particular with the custom optical transceiver VTRX. For the encoding of the redundancy link we are investigating a scheme with a ProASIC3 FPGA.…”

Section: Provide Reset Capabilities For the Fe (Reset)mentioning

confidence: 99%

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CMS Technical Design Report for the Phase 1 Upgrade of the Hadron Calorimeter

Mans¹

2012

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This report describes the technical design and outlines the expected performance of the Phase 1 Upgrade of the CMS Hadron Calorimeters. The upgrade is designed to improve the performance of the calorimeters at high luminosity with large numbers of pileup events by increasing the depth-segmentation of the calorimeter and providing new capabilities for anomalous background rejection. The photodetectors of the CMS Barrel and Endcap Hadron Calorimeters, currently hybrid photodiodes (HPDs), will be replaced by silicon photomultiplier (SiPM) devices. The single-channel phototubes of the Forward Hadron Calorimeter will be replaced by multi-anode phototubes operated in a dual-anode configuration. The readout electronics for all three calorimeter systems will also be replaced. A new charge-integrating ADC, the QIE10, with an integrated TDC will be used along with a 4.8 Gbps data-link. The off-detector electronics will also be substantially upgraded to handle higher data volumes and improve the information sent to the calorimeter trigger system. The expected performance of these upgrades is discussed, including a detailed study of several Higgs and SUSY analyses. The planning for the implementation of this upgrade is presented, including construction, testing, and installation. AcknowledgmentsWe would like to thank the technical staff from the various institutions for the design, R&D and testing of the many components of this upgrade.We also wish to thank the LHCC for their oversight and crucial advice during the development of the HCAL Phase 1 upgrade project. We also acknowledge the warm support received from the CMS management team. The important feedback from following CMS internal reviewers greatly helped in the development of this technical design report: Finally, we dedicate this technical design report for the phase 1 upgrade of the HCAL subdetectors to the memory of our colleague

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The Versatile Link common project: feasibility report

Cited by 51 publications

References 14 publications

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

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

Discovery and Measurement of the Higgs Boson in the WW Decay Channel

CMS Technical Design Report for the Phase 1 Upgrade of the Hadron Calorimeter

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