A Fully Bidirectional Optical Network With Latency Monitoring Capability for the Distribution of Timing-Trigger and Control Signals in High-Energy Physics Experiments

Papakonstantinou, Ioannis; Soós, C.; Papadopoulos, S; Détraz, S.; Sigaud, Christophe; Stejskal, Pavel; Storey, S; Troska, J.; Vasey, F.; Darwazeh, Izzat

doi:10.1109/tns.2011.2154364

Cited by 16 publications

(19 citation statements)

References 29 publications

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“…• ability to receive fast control (TTC) signals from the present system • flexibility to accommodate future evolutions of the TTC system, like [65] as much as reasonably achievable…”

Section: Control Systemmentioning

confidence: 99%

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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“…• ability to receive fast control (TTC) signals from the present system • flexibility to accommodate future evolutions of the TTC system, like [65] as much as reasonably achievable…”

Section: Control Systemmentioning

confidence: 99%

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

Mans¹

2012

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“…The TTC-PON system was developed at CERN in the context of phase-1 and 2 upgrades of the LHC (large hadron collider) experiments in order to propose a new generation TTC system overcoming the major limitations of its predecessor [1]. The system is responsible for delivering timing, trigger and control from a central trigger unit to the detector sub-partitions in the back-end part of the LHC experiments as shown in figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…The TTC-PON concept has been studied and developed since 2010 [1] [2] and the current version of the system, based on the XG-PON (10-gigabit capable passive optical networks) technology from ITU (international tellecomunication union), will be adopted by the ALICE experiment for phase-1 upgrades [3].…”

Section: Introductionmentioning

confidence: 99%

Demonstrating TTC-PON Robustness and Flexibility

Mendes¹,

Saint-Germain²,

Vasey³

et al. 2018

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

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In 2016, a TTC-PON (Timing, Trigger and Control system based on Passive Optical Networks) demonstrator was presented at TWEPP as an alternative to replace the TTC system, currently responsible for delivering timing, trigger and control commands in the LHC experiments. Towards a deployment foreseen for ALICE phase-1 upgrade, the system has been consolidated through flexible software implementation providing full configuration, complete calibration and extended monitoring and diagnostic tools. A new demonstrator setup was built with various FPGA platforms to test the system with an increased number of nodes and under different environmental conditions. This paper focuses on the TTC-PON system design with a discussion on its features and scaled-up tests.

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“…The idea of individually self-calibrating, bidirectional links has been applied recently following the same principle [24]- [26] or variations thereof [22], [27], [28] in the generic setting of large scale, distributed readout systems for physics experiments, with the main goal of compensating for drifts in the propagation delay of long transmission lines. However, this clocking method carries additional benefits for smaller systems like PET, namely: vastly reduced calibration needs, deterministic latency, and detector mobility with simplified cabling.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Modular PET System Architecture with Synchronization over Data Links

Aliaga

Bosch

Monzó

et al. 2014

IEEE Trans. Nucl. Sci.

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Abstract-A DAQ architecture for a PET system is presented that focuses on modularity, scalability and reusability. The system defines two basic building blocks: data acquisitors and concentrators, which can be replicated in order to build a complete DAQ of variable size. Acquisition modules contain a scintillating crystal and either a position-sensitive photomultiplier (PSPMT) or an array of silicon photomultipliers (SiPM). The detector signals are processed by AMIC, an integrated analog front-end that generates programmable analog outputs which contain the first few statistical moments of the light distribution in the scintillator. These signals are digitized at 156.25 Msamples/s with free-running ADCs and sent to an FPGA which detects single gamma events, extracts position and time information online using digital algorithms, and submits these data to a concentrator module. Concentrator modules collect single events from acquisition modules and perform coincidence detection and data aggregation. A synchronization scheme over data links is implemented that calibrates each link's latency independently, ensuring that there are no limitations on module mobility, and that the architecture is arbitrarily scalable. Prototype boards with both acquisition and concentration functionality have been built for evaluation purposes. The performance of a small PET system with two detectors based on continuous scintillators is presented. A synchronization error below 50 ps rms is measured, and energy resolutions of 19% and 24% and timing resolutions of 2.0 ns and 4.7 ns FWHM are obtained for PMT and SiPM photodetectors, respectively.

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A Fully Bidirectional Optical Network With Latency Monitoring Capability for the Distribution of Timing-Trigger and Control Signals in High-Energy Physics Experiments

Cited by 16 publications

References 29 publications

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

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

Demonstrating TTC-PON Robustness and Flexibility

Evaluation of a Modular PET System Architecture with Synchronization over Data Links

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