Conveners
Trigger and Timing Distribution
- Andrea Boccardi (CERN)
- Sophie Baron (CERN)
Trigger and Timing Distribution
- Sophie Baron (CERN)
- Andrea Boccardi (CERN)
Trigger and Timing Distribution
- Sophie Baron (CERN)
- Cristina Fernandez Bedoya (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
Trigger and Timing Distribution
- Cristina Fernandez Bedoya (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
- Sophie Baron (CERN)
The ATLAS experiment requires a high-precision bunch clock distribution for the High-Luminosity upgrade of the Large Hadron Collider. A new trigger and timing distribution system based on FPGA transceivers and high-speed serial links will replace the existing one. In preparation for this upgrade, we characterized the clock phase uncertainty of AMD UltraScale+ transceivers after reset. We found...
Picosecond-level phase determinism in timing distribution systems is a requirement for future detectors in High Energy Physics. FPGA transceivers traditionally used to propagate timing do not meet by default this stringent requirement, and suffer from phase jumps at startup and temperature drifts. While ad-hoc solutions have been developed based on particular FPGA features to measure phase...
The LHC RF and Timing Distribution backbone is being upgraded for the HL-LHC. A White Rabbit technology solution for the generation and the distribution of the RF, similar to the system currently employed in SPS, is being considered. To verify its suitability from a phase stability perspective, an investigation was conducted on a proof-of-concept system. The requirement for the end-nodes is ±...
For the High-Luminosity Large Hadron Collider era, the trigger and data acquisition system of the Compact Muon Solenoid experiment will be entirely replaced. Novel design choices have been explored, including ATCA platforms with SoC controllers and interconnect technologies with serial optical links with data rates up to 28 Gb/s. Trigger data analysis will be performed through sophisticated...
The Overlap Muon Track Finder (OMTF) is one of the subsystems of the CMS L1 Trigger. For the High-Luminosity Large Hadron Collider era (CMS phase-2 upgrade), a new version of the OMTF is currently under development. This upgraded version will be implemented on a custom ATCA board X2O, which houses a Xilinx UltraScale+ FPGA and 25 Gbps optical transceivers. This contribution focuses on the...
The HL-LHC has motivated a generalized upgrade in electronic systems across all experiments. In the new electronics architecture for the CMS Drift Tubes detector, the trigger generation moves from on-detector ASICs to the back-end, to be carried out by top-range FPGAs. The new algorithm aims to deliver full-resolution, offline-grade performance in the reconstruction of muon segments. To...
Phase-2 CMS will replace the trigger and data acquisition system in preparation for the HL-LHC. This upgrade will allow a maximum accept rate of 750kHz and a latency of 12.5us. To achieve this, new electronics and firmware are being designed. We describe the first version of an algorithm capable of detecting and identifying muon showers, running in the first layer of the trigger system.
It...
We report on the development, implementation, and performance of a fast neural network used to measure the transverse momentum in the CMS Level-1 Endcap Muon Track Finder. The network aims to improve the triggering efficiency of muons produced in the decays of long-lived particles. We implemented it in firmware for a Xilinx Virtex-7 FPGA and deployed it during the LHC Run 3 data-taking in...
The design, testing, system integration and performance of the ATCA processor (APx) boards firmware and software for the Phase 2 CMS trigger upgrade are presented. The 76 boards plus spares comprise the Calorimeter Trigger and half of the Global Track and Correlator Triggers. The production boards are based on the Xilinx VU13P and have 124 25G optical interfaces. A new optical link protocol...
The New Small Wheel is a detector designed for the CERN ATLAS experiment, ensuring tracking resolution and efficiency in the LHC high-luminosity era. Comprising Micromegas and small-strip Thin Gap Chamber technologies, it reduces the rate of invalid data acquisition requests in a cavern background-sensitive region. The focus of this contribution is the electronics of its trigger processor,...
