To cope with the enhanced luminosity at the Large Hadron Collider (LHC) in 2021, the ATLAS collaboration is planning a major detector upgrade. As a part of this, the Level 1 trigger based on calorimeter data will be upgraded to exploit the fine granularity readout using a new system of Feature EXtractors (FEX), which each reconstruct different physics objects for the trigger selection. The jet FEX (jFEX) system is conceived to provide jet identification (including large area jets) and measurements of global variables within a latency budget of less then 400ns. It consists of 6 modules. A single jFEX module is an ATCA board with 4 large FPGAs of the Xilinx Ultrascale+ family, that can digest a total input data rate of ~3.6 Tb/s using up to 120 Multi Gigabit Transceiver (MGT), 24 electrical optical devices, board control and power on the mezzanines to allow flexibility in upgrading controls functions and components without affecting the main board. The 24-layers stack-up was carefully designed to preserve the signal integrity in a very densely populated high speed signal board selecting MEGTRON6 as the most suitable PCB material. This contribution reports on the design challenges and the test results of the jFEX prototypes. In particular the fully assembled final prototype has been tested up to 12.8 Gb/s in house and in integrated tests at CERN. The full jFEX system will be produced by the end of 2018 to allow for installation and commissioning to be completed before LHC restarts in March 2021.
Tile Computer-on-Module for the ATLAS Tile Calorimeter Phase-II upgrades
瓦片预处理器（TilePPr）是高亮度大型强子对撞机（HL-LHC）瓦片量热计（TileCal）探测器外电子学的核心元件。TilePPr包括基于FPGA的板，用于操作和读取TileCal探测器上的电子器件。Tile Computer on Module（TileCoM）夹层嵌入在TilePPr中，实现三个主要功能。这些包括远程配置探测器上的电子设备和TilePPr FPGA，将TilePPr与ATLAS触发和数据采集（TDAQ）系统连接，以及通过提供监测数据将TilePPr与ATLAS探测器控制系统（DCS）连接。TileCoM是一款10层板，配有用于处理数据的Zynq UltraScale+ ZU 2CG、与TilePPr集成的接口组件以及连接到高级电信计算架构载体的电源。CentOS嵌入式Linux部署在TileCoM上，以实现HL-LHC所需的功能。本文从远程编程、与ATLAS TDAQ系统和DCS系统的接口等方面介绍了TileCoM系统的硬件和固件开发。
Firmware implementation of a recurrent neural network for the computation of the energy deposited in the liquid argon calorimeter of the ATLAS experiment
The Monitoring System of the End-Cap Calorimeter in the Belle II experiment
Belle II实验目前正在KEK（日本筑波）的SuperKEKB电子-正电子对撞机上进行第二阶段操作。该探测器是KEKB对撞机上Belle实验的升级，它被优化用于研究罕见的B衰变，对标准模型之外的新物理信号也很敏感。电磁量热计（ECL）是基于CsI（Tl）闪烁晶体。它分裂成一个桶和两个环形端盖区域，根据对撞机的非对称设计，后者被命名为向前和向后。CsI（Tl）晶体以可承受的成本提供高光输出，但其产量随温度变化，并且由于对水分的强烈化学亲和力，可能会被湿度永久损坏。然后，每个ECL区域都配备了热敏电阻和湿度探头，以监测环境数据。虽然传感器和布线都继承了原来的百丽设计，ECL监测系统已完全重新设计。在本文中，我们提出了硬件和软件架构部署的2112 CsI（Tl）晶体安排在向前和向后的端盖。单板计算机（SBC）是专为嵌入式应用而设计的。对于传感器读出，已实现了基于具有本地处理能力的24位ADC的数据采集系统，并与SBC接口。EPICS应用程序通过局域网发送数据，用于遥控和显示。
Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20-300 GeV positrons
紧凑型μ子螺线管合作正在设计一种新的高粒度端盖量热计HGCAL，将在本十年晚些时候安装。作为这项开发工作的一部分，建立了一个原型系统，其电磁部分由14个双面结构组成，提供28个采样层。每个采样层都有一个六边形模块，其中多焊盘大面积硅传感器被粘在电子电路板和金属基板之间。大约1 cm $^2$的传感器焊盘通过引线键合到电路板上，并由定制集成电路读出。该原型于2018年在CERN的超级质子同步加速器上进行了广泛的光束测试。正电子束收集的数据的基础上，与能量范围从20到300 GeV，测量的能量分辨率和线性度，位置和角分辨率，和簇射形状的介绍和比较详细的Geant 4模拟。
Serenity-S1, a CMS Tracker Readout and Data Processing Card for HL-LHC
Imperial College London（帝国理工学院）；Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）；STFC Rutherford Appleton Laboratory（STFC卢瑟福阿普尔顿实验室）；University of Bristol（布里斯托大学）；Chinese Academy of Sciences（中国科学院）
