TRBnet for the CBM MVD-Prototype

TRBnet for the CBM MVD-Prototype Borislav Milanović In cooperation with: J. Michel, M. Deveaux, S. Seddiki, M. Traxler, S. Youcef, C. Schrader, I. Fröhlich, C. Müntz

Overview 1/22 Overview

TRBnet@HADES 2/22 HADES

TRBnet@HADES – Specifications 3/22 HADES Specifications • 80 000 data channels • 520 PCBs / 550 FPGAs • 6 Detector Systems • Au Au: • 20 kHz trigger rate (105 collision rate) • 200 particles/event • 200 MByte/s

TRBnet@HADES – Explanation 4/22 TRBnet ? • Protocol • HADES and FAIR • DAQ • FPGA + Optical Links • Network • Unified Bus • Secure Transmission

TRBnet@HADES – Network 5/22 TRBnet@HADES 2 x 372 x 12 x 30 x 3 x • 20  2 GBit/s 6 x 9 x 24 x 2 x 4 x - Jan Michel, „Status of the HADES Upgrade“ -

TRBnet Key Features 6/22 TRBnet

TRBnet Key Features – Architecture 7/22 Architecture Detector n Detector 2 ... Detector 1 Optical Network Data Processing Trigger System Slow Control

TRBnet Key Features – Dataflow 8/22 Dataflow Detector n Detector 2 ... Detector 1 Optical Network Data Processing Trigger System Slow Control Max. 3 μs latency

TRBnet Key Features – Specifications 9/22 TRBnet Specifications • Four prioritized virtual Channels • Layers • Unique IDs • CRC checksum CRC 5 x 16bit addr1 addr2 addr3

TRBnet Key Features – Channels 10/22 TRBnet Specifications • Channel switching after each data packet 1 Optical Link

TRBnet Key Features – Facts 11/22 TRBnet Facts • 80 bit/packet, 64 bit payload • Overhead 16 bit! • Error detection • No inconsistent data through transport • Secure Transfers • All boards answer each transfer • Independent on underlying System/Data • TRBnet reduces net-bandwidth to 63% • E.g. Optical Link 3 Gbit/s 2Gbit/s

MVD Requirements 12/22 CBM

MVD Requirements – Geometry 13/22 MVD MAPS

MVD Requirements – Station 1 simulation 14/22 1 prototype Station 1 Simulation • Au Au @ 25GeV • 5105 collision rate • Tint = 10 μs • approx. 7 GByte/s Data Rate per Sensor [MByte/s] - Sélim Seddiki, „MVD DAQ Prototype“ -

MVD Requirements – Prototype 15/22 • MimoSIS-1 • M26 high-res. inspired • 3 cm2 MVD Prototype =  4  5 = • MVD Module: • 2-sided, 0,37 between sensors: 2 x 50 µm Si, 300 µm CVD-Diam., 2 x 35 µm Glue → 350 µm Siequ, (0.37 % X0), Ø 359 µm Siequ , (0.383 % X0) • 5 sensors / module • 500 µm overlap of opposite sensors (pitch: ~ 20 µm) • 9 cm2 - Christian Müntz -

MVD Requirements – Datarate 16/22 Comparison • Main challenge: • 40 Gbit/s • Self-Triggering Trigger Particles Datarate

Evaluation and Future Actions 17/22 Evaluation

Evaluation and Future Actions – Readout 18/22 Scheme 2 Gbit/s effective* *Bandwidth depends on the FPGA frequency FPGA 5 MAPS ... TRBnetHUB ... FPGA ... 40 Gbit/s MVD-Prototype TRBnet => 25 optical links

Evaluation and Future Actions – Readout 19/22 Scheme 2 Gbit/s effective* *Bandwidth depends on the FPGA frequency ROC FPGA 5 MAPS ... ? TRBnetHUB ... 8b10b + twisted pair copper FPGA ... 40 Gbit/s MVD-Prototype TRBnet => 25 optical links

Evaluation and Future Actions – First steps 20/22 First Steps data • MAPS Addon Board with PEXOR Card • First TRBnet implementation for MAPS • TRBnet Hubs • Datarate simulation 1 MAPS PC

Evaluation and Future Actions – Summary 21/22 Summary • TRBnet is ideally suited for the first MVD prototype simulations • Already implemented • Highly modular (written in VHDL) • Various configurations • Low latency (3 μs), decent bandwidth (63 %) • Extensible - new designs, larger data buffers • Tested on XILINX and Lattice FPGAs @ HADES • up to 100 MHz, 16bit data format • First steps towards the ROC

References 22/22 References • J. Michel, „Development of a Realtime Network Protocol for HADES and FAIR Experiments“ • J. Michel, „Status of the HADES Upgrade“ • I. Fröhlich, „The Readout of the CBM MVD“ • M. Deveaux, „Status of the Micro Vertex Detector of the CBM Experiment“ • S. Seddiki, „MVD DAQ Prototype“ Thank You!

TRBnet for the CBM MVD-Prototype