Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session H09: Particle Physics Instrumentation IIIRecordings Available
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Sponsoring Units: DPF Chair: Julie Hogan, Bethel University Room: Salon 3 |
Sunday, April 10, 2022 10:45AM - 10:57AM |
H09.00001: Thermal and electrical performance tests of ATLAS silicon strip detector modules at BNL Punit Sharma The inner tracking detector of the ATLAS experiment at CERN is currently preparing for an upgrade to operate in the High Luminosity LHC, scheduled for the late 2020s. A complete replacement of the existing Inner Detector of ATLAS is required to cope with the expected luminosity and radiation damage. The all-silicon Inner Tracker (ITk) design under construction composes a mixture of Pixel and Strips layers. At the core of the strip, barrel detector is the stave, thermo-mechanical support structures, each of which hosts 28 silicon modules. A thorough characterization of the modules before the assembly on each stave is critical; thus, each module has to undergo electrical and thermal quality control (QC) testing between module production and stave assembly. The modules are thermal cycled ten times between -35C and +40C. This talk will discuss the thermal and electrical performance of the US testing setup, focusing on the difficulties encountered to meet the QC requirements. It will also give an overview of the results obtained by analyzing the first batch of produced modules during pre-production. |
Sunday, April 10, 2022 10:57AM - 11:09AM |
H09.00002: Electrical characterisation of stave prototypes for the ATLAS ITk Upgrade Francesca Capocasa The ATLAS experiment is currently preparing for an upgrade of the inner tracking detector for High-Luminosity LHC operation, scheduled to start in 2027. The new detector, known as the Inner Tracker or ITk, employs an all-silicon design with five inner Pixel layers and four outer Strip layers. The staves are the building blocks of the ITk Strip barrel layers. Each stave consists of a low-mass support structure which hosts the common electrical, optical and cooling services as well as 28 silicon modules, 14 on each side. Two prototype electrical long-strip staves have been assembled at BNL.In this talk, we will present the deliverables of this prototyping phase highlighting the improvent of the stave layout and the results on the most recent stave. |
Sunday, April 10, 2022 11:09AM - 11:21AM |
H09.00003: Development and Testing of the AMACStar ASIC at Penn for the ATLAS ITk Detector Thomas Gosart In preparation for the high-luminosity LHC (HL-LHC), the ATLAS detector will be upgraded with a new silicon-strip charged-particle tracking detector (ITk strip detector) to satisfy the new radiation, granularity, and timing requirements. The AMACStar (Autonomous Monitor and Control) is one of three ITk application-specific integrated circuits (ASICs). It is designed to monitor and control temperatures, voltages, and currents in the detector modules. This is an essential function for the ITk detector; the ASIC can autonomously (and quickly) identify hazards in the detector modules, controlling and preventing them from spreading. |
Sunday, April 10, 2022 11:21AM - 11:33AM |
H09.00004: Hough Transform pattern recognition for track finding at the ATLAS experiment at the LHC Natalie Harrison, Antonio Boveia, Alexander Paramonov We are exploring Hough Transform (HT) algorithms in FPGAs to identify charged particle trajectories in the ATLAS detector at the HL-LHC. The Inner Detector of the ATLAS experiment measures the trajectories of charged particles in a uniform magnetic field. Our approach is to perform the Hough transformation pattern identification in two steps. The "first-stage" HT uses parameter space in phi0 and q/pT using hits from the semiconductor tracker and identifies those that are consistent with being from the same track. We evaluate adding a second HT step using eta-z0 track coordinate plane, that processes hits identified from roads in the first stage. A working firmware prototype for FPGAs is designed. The performance of this second stage HT is measured as the efficiency and rejection of MC simulations and is presented here, along with an estimation of the resources required of the firmware. |
Sunday, April 10, 2022 11:33AM - 11:45AM |
H09.00005: Design and Construction of Radiation-Hard, Thermally Conductive Dees for the HL-LHC Upgrade to the CMS Inner Tracker Samuel Bright-Thonney During the upcoming High-Luminosity run of the Large Hadron Collider (HL-LHC), the silicon sensors on the innermost tracking layers of the Compact Muon Solenoid (CMS) experiment are expected to receive up to 1.2 × 1016 neq/cm2 of accumulated fluence (1.5 Grad TID). Radiation-damaged sensors will generate larger leakage currents and require higher bias voltages for efficient operation, which increases the thermal load on the detector and heightens the risk of permanent damage from runaway heating. In this talk, we describe ongoing efforts to design sensor mounting structures (“Dees”) with radiation-hard, high thermal conductivity materials that can maintain robust thermal pathways to a liquid CO2 cooling system for the full lifetime of the experiment. We focus on work performed at Cornell University, where we have developed a new thermal interface material (TIM) with exceptional radiation tolerance and are building up sophisticated laboratory infrastructure to automate Dee manufacturing and assess thermal performance. This work pertains to Dees in the forward region of the inner tracker, and is performed in collaboration with other universities as part of the Tracker Forward Pixel (TFPX) upgrade effort. |
Sunday, April 10, 2022 11:45AM - 11:57AM |
H09.00006: BTL Cooling Plate Studies for the CMS MTD Upgrade Orgho A Neogi The Barrel Timing Layer (BTL) is a central component of the MIP Timing Detector (MTD) of the Compact Muon Solenoid (CMS). Precision timing information from this detector is necessary for the challenges of High-Luminosity LHC operations. These upgrades require an increase in the cryogenic capacity provided to the BTL system. Prototype cooling plates have been in development and have been tested in liquid CO2 at Fermilab under heating and cooling cycles. Results will be used for further development of the cooling system for the BTL detector. |
Sunday, April 10, 2022 11:57AM - 12:09PM |
H09.00007: A neural network-based tagger for the identification of bottom quarks in the CMS Level-1 trigger Aidan D Chambers, Dylan S Rankin The Phase II upgrade of the CMS detector for the High Luminosity upgrade of the LHC (HL-LHC) includes the introduction of many new capabilities into the Level-1 trigger, including tracking and the new high-granularity calorimeter. The inclusion of tracking in particular offers the possibility of developing an algorithm to identify jets originating from bottom quarks for use in the Level-1 trigger for the first time at CMS. We present the logic of this algorithm, along with the inputs and a possible implementation using prototype hardware. We show that this implementation is capable of operating within the budgeted latency requirements of the Level-1 trigger environment. The expected performance and physics implication of such an algorithm is shown using Monte Carlo samples with 200 pileup, simulating the harsh conditions of the HL-LHC. |
Sunday, April 10, 2022 12:09PM - 12:21PM |
H09.00008: Report for Syracuse Electronics Quality Assurance of components of the Upstream Tracker Detector for the LHCb Upgrade I Xixin Liang The Upstream Tracker (UT) detector is a large-area silicon detector that is part of the LHCb Upgrade. The UT is composed of four large planes, each of approximately 2 m2 area, and includes about 1000 silicon modules. The modules are mounted on structural supports that provide both precise alignment and integrated bi-phase CO2 cooling. Each module is composed of a silicon sensor, a flex hybrid containing 4 (or 8) custom ASICs, and a BN stiffener. The UT detector is an integral part of the lowest level trigger in the LHCb upgrade, and is critical to meeting the timing requirements to have a fully software-based trigger in LHCb at the nominal operating luminosity. To that end, a single hit efficiency of larger than about 99% and high S/N are mandatory. In this talk we will discuss the numerous quality assurance tests performed to ensure that the installed UT detector meets the requirements of the LHCb upgrade. |
Sunday, April 10, 2022 12:21PM - 12:33PM |
H09.00009: Towards a tracker system for the Muon Collider experiment Sergo Jindariani, Beren Ozek, cecilia E gerber Among the projects currently under study for the post-LHC generation of particle accelerators the muon collider represents a unique machine, which has the capability to provide very high energy leptonic collisions and to open the path to a vast and mostly unexplored Physics program. However, on the experimental side, such a great Physics potential is accompanied by unprecedented technological challenges, due to the fact that muons are unstable particles. Their decay products interact with the machine elements and produce an intense flux of background particles that eventually reach the detector and might degrade its performance. Being the closest detector to the beamline, the tracker is the most affected by the beam-induced background. This contribution will outline the measures adopted in order to mitigate the background effects on the track reconstruction and will present the tracking performance in the presence of the beam-induced background. We will discuss considerations on the tracker design and improvement strategies using novel tracking algorithms based on the A Common Tracking Software (ACTS) library. |
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