Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session R17: Mini-Symposium: Streaming Readout for Future ExperimentsFocus
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Sponsoring Units: DNP Chair: Doug Hasel, MIT Room: Sheraton Grand Ballroom II |
Monday, April 15, 2019 1:30PM - 2:06PM |
R17.00001: Streaming trigger-less readout for current and future Experiments Invited Speaker: Jan Christopher Bernauer With the advent of cheap, highly integrated and fast converter electronics, the old and limiting paradigm of a triggered read out solution can be replaced with a streaming readout system, in which data selection is moved into the software domain. In the talk I will describe advantages and disadvantages of such a system, discuss contemporary approaches and will sketch future readout solutions. |
Monday, April 15, 2019 2:06PM - 2:18PM |
R17.00002: A triggerless DAQ for the Electron Ion Collider Marco Battaglieri The Electron-Ion Collider (EIC) is designed for a substantial progress in understanding the Quantum Chromo Dynamics (QCD). With an unprecedented luminosity and polarization of the beams, accelerating nuclei from H to U up to an energy in the center of mass of 140 GeV, EIC is the final tool to study parton distributions in nuclei, QCD at extreme parton density, spin and flavor structure of the nucleon and tests of the fundamental electro-weak symmetry. Given its wide program, the requirements posed to the experimental setups are highly challenging. In particular, the electron identification used to trigger the data acquisition, is one of the most important and crucial component of the whole experiment. We propose to study a triggerless data acquisition system for the EIC electromagnetic calorimeter, exploring the necessary algorithms to perform an on-line calibration/reconstruction and data filtering on a CPU-server and test the concept on an array of PbWO crystals read by SiPMs. |
Monday, April 15, 2019 2:18PM - 2:30PM |
R17.00003: Streaming readout for sPHENIX and a sPHENIX-based EIC detector Jin Huang, Martin L Purschke sPHENIX is a state-of-the-art jet and heavy flavor detector planned at the Relativistic Heavy Ion Collider (RHIC). Its data acquisition is a hybrid of multiple types of streaming-readout front-end electronics (FEE) from the tracking system, and a triggered event readout from the calorimeters. The experiment will have a disk throughput of 100-200 Gbps. A detector concept for an electron ion collider (EIC) is also developed based on the sPHENIX detector and the sPHENIX DAQ architecture, then in a full streaming mode. At the core of the streaming readout, large FPGA-based interface cards ("FELIX" BNL-712 cards) are used to distribute timing to and zero-suppress, compress, package data from custom front-end boards. The PCIe-based FELIX cards interface the front-end with standard Linux computers. The concept of this DAQ system and recent development highlights will be discussed in this talk. |
Monday, April 15, 2019 2:30PM - 2:42PM |
R17.00004: A streaming readout DAQ system for the BDX experiment Fabrizio Ameli, Marco Battaglieri, Andrea Celentano, Paolo Musico, Luca Marsicano, Tommaso Chiarusi, Carmelo Pellegrino, Riccardo Lunadei, Giacomo Chiodi, Luigi Recchia, Manlio Capodiferro, Lorena Stellato, Daniele Ruggieri, Antonio Girardi, Carlo Alessandro Nicolau The electronic board presented in this work is a 12-channel digitizer designed for Beam Dump eXperiment at JLab. Main features are a low cost per channel, a flexible and high-performance timing system, an adequate memory buffer, a versatile front-end circuitry, and a trigger-less approach. The digitizing chain is based on a dual-ADC family, whose members are pin to pin compatible with a choice of 12/14 resolution bits and sampling frequencies from 65 to 250 MHz. For time alignment to a common reference, the board implements a White-Rabbit interface but also accepts a clock signal, which is jitter cleaned and distributed by a PLL. Physics data transmission and board control are accomplished by a commercial System-on-Module mezzanine board based on a Zynq7045. The board applies a “level-0 trigger”, ie selects hits passing a programmable threshold; samples plus timestamp and channel information are coded in packets and forwarded to PCs for trigger selection and event building. The trigger-less paradigm simplifies both the hardware requirements and the data flow, moving the complexity of higher-level triggers toward the PC farm. The proposed algorithm is effectively scalable to adapt to whatsoever channel number, provided that the interconnection network needs to grow accordingly. |
Monday, April 15, 2019 2:42PM - 2:54PM |
R17.00005: Evaluation of the adoption of a Streaming Data Model for Experimental Nuclear Physics Markus Diefenthaler, Graham Heyes While there have been remarkable advances in microelectronics, computing, and data science over recent decades, the research model of Experimental Nuclear Physics (ENP) has remained relatively unchanged. Groups at several institutions are now investigating a streaming data model of readout that takes advantage of these advances. On the time scale of the Electron Ion Collider, streaming detector readout will not only be a viable alternative but may well be the standard readout mode for many experiments. With the future evolution of the 12 GeV program at Jefferson Lab and the ongoing design of the Electron-Ion Collider in mind, we have an opportunity to investigate how moving to streaming readout can fundamentally improve the research model of ENP. Examples of areas of investigation are:
In our presentation, we will summarize the progress of ongoing work at Jefferson Lab to evaluate the streaming readout model and how a move to that model influences data storage and processing. |
Monday, April 15, 2019 2:54PM - 3:06PM |
R17.00006: Overview of the MOLLER Experiment Integrating Cherenkov Detector Readout and Front-end Electronics Michael Gericke The proposed MOLLER experiment at Jefferson Laboratory aims to determine the Weak charge of the electron via a measurement of the parity-violating asymmetry (APV ) in electron-electron scattering at 11 GeV. The measurement will determine the Weak mixing angle at low energy to very high precision, competitive with the best collider measurements of the same quantity. The small size of the asymmetry (33 ppb) and the high goal measurement precision (2.3%) requires both, high rate detection of scattered electrons in integration mode, and pulse mode detection for particle tracking. This talk provides an overview of the MOLLER detector requirements, with specific emphasis on the data rates, integration mode sampling scheme, and the required front-end electronics, involving a combination of straight streaming and FPGA based preprocessing. |
Monday, April 15, 2019 3:06PM - 3:18PM |
R17.00007: Development of Integrating Electronics for the MOLLER Experiment Jie Pan The aim precision of the MOLLER weak charge measurement requires very high event rates of up to 5 GHz per detector and up to 1 MHz/mm2 in peak regions of scattered electron flux. Together with the very small asymmetry, this requires high precision current mode detection of the scattered electrons using an array of about 300 quartz Cherenkov detectors. This talk discusses details of the current progress in the design of the associated high resolution, low noise, front-end electronics including FPGA based data integration and selection as well as streaming. |
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