1,721,047 research outputs found
A radiation tolerant readout link and control board for the Phase-II upgrade of the ATLAS Hadronic Tile Calorimeter
No full textThis work presents performance and radiation test results for the updated prototype of a radiation tolerant read-out link and control Daughterboard (DB) for the Phase-II upgrade of the ATLAS Hadronic Tile Calorimeter (TileCal) front-end electronics for high-luminosity LHC. In the upgraded system, photomultiplier signals are ampli ed, shaped and digitized by the front-end electronics and a Mainboard (MB), while the DB collects and transmits the digitized data to the off-detector over multigigabit optical links. The DB provides a bi-directional interface between the front-end and off-detector electronics, receiving con figuration, control and LHC-synchronous timing over two 4.8 Gbps downlinks to a pair of CERN GBTx ASICs, and providing high-speed readout off-detector over two redundant 9.6 Gbps uplinks, each driven by one of two Xilinx Kintex Ultrascale FPGAs. The DB design is double redundant to minimise single-point failure modes, and the FPGA fi rmware uses strategies including TMR, FEC and CRC to minimize the effects of single-event upsets and damage from hadronic and minimum ionizing radiation. The DB is expected to receive approximately 0.2 krad of total ionizing and 2.44 neutrons / of non-ionising radiation over a 10 year period, so the prototype board and components have undergone TID, NIEL and SEE with large safety factors in order to be radiation quali ed for high-luminosity LHC operations
25th International Conference on Computing in High Energy & Nuclear Physics
No full textThe dCache project provides open-source software deployed internationally to satisfy ever more demanding storage requirements. Its multifaceted approach provides an integrated way of supporting different use-cases with the same storage, from high throughput data ingest, data sharing over wide area networks, efficient access from HPC clusters and long term data persistence on a tertiary storage. Though it was originally developed for the HEP experiments, today it is used by various scientific communities, including astrophysics, biomed, life science, which have their specific requirements. In this paper we describe some of the new requirements as well as demonstrate how dCache developers are addressing them
Extension of the L1Calo PreProcessor System for the ATLAS Phase-I Calorimeter Trigger Upgrade
Get PDFFor the Run-3 data-taking period at the Large Hadron Collider (LHC), the hardware- based Level-1 Calorimeter Trigger (L1Calo) of the ATLAS experiment was upgraded. Through new and sophisticated algorithms, the upgrade will increase the trigger performance in a challenging, high-pileup environment while maintaining low selection thresholds.
The Tile Rear Extension (TREX) modules are the latest addition to the L1Calo PreProcessor system. Hosting state-of-the-art FPGAs and high-speed optical transceivers, the TREX modules provide digitised hadronic transverse energies from the ATLAS Tile Calorimeter to the new feature extractor (FEX) processors every 25 ns. In addition, the modules are designed to maintain compatibility with the original trigger processors. The system of 32 TREX modules has been developed, produced and successfully installed in ATLAS. The thesis describes the functional implementation of the modules and the detailed integration and commissioning into the ATLAS detector
Multi-Anode Photomultplier (MAPMT) readout for High Granularity Calorimeters
No full textHadron calorimeter high performance in jet sub-structure measurements can be achieved for objects with greater than 1 TeV if the readout geometry is finely segmented in . A feasibility study to increase the readout granularity of TileCal, the central hadron calorimeter of the ATLAS detector, is presented. We show a preliminary study exploring the possibility to increase by a factor 4 the present readout granularity of the inner layer cells of TileCal (0.1->0.025 in ) and to split into two layers the intermediate section of TileCal. The proposed solution is designed to cope with mechanical and readout bandwidth and power constraints. Assuming that the mechanics of the Tile modules cannot be changed, Multi-Anode PMTs with same boundary geometry of the present single-anode PMTs are considered to readout WLS bers, ideally one per pixel, carrying the signals from the individual scintillating tiles of each detector cells. The discussed challenges of the design are: the new optics required to expand the image of WLS fiber bundle onto the MAPMT cathode; the procedure to map the individual tile luminous signal in the individual anode signal; the architecture of the new front end electronics for summing and digitizing the MAPMT signals
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