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Operated by the Los Alamos National Security, LLC for the DOE/NNSA

FVTX Data Acquisition System

Mark Prokop

Accelerator Operation &Technology Division

RF Engineering Group

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Slide 2Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Introduction

• Overview of the Engineering Problem

• System

• Implementation

• Concluding remarks

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Slide 3Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Engineering Problem

• Transport data from the detectors to the PHENIX data collection system

• Meet requirements

• Abide with the constraints

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Slide 4Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Data Transport

Sensor8640 FPHX

Chips42 FEMs 11 DCMs168 ROCs3.45e12 Gb/sec 201.6e9 Gb/sec 8.8e9 GB/sec

17,280 LVDS pairs@200MHz

84 FO cables@2.5Gb/Sec

11 FO cables@800Mb/sec

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Slide 5Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Requirements

• Physics– Signal-to-noise, radiation length– data capture and integrity

• Timing– LVL-1– DCM

• Radiation– 100k-200k Rad Integrated dose over 10 years– 1.0x10-7 to 1.6x10-5 /bit/hour upset rates

• Physical

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Slide 6Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Constraints

• Mechanical

• Thermal

• PHENIX System– Data Collection rates– Collocated with VTX– IR Shared with other detector systems

• PHENIX Environment– Noise– Magnetic Fields– Interference

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Slide 7Operated by the Los Alamos National Security, LLC for the DOE/NNSA

DAQ System

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Slide 8Operated by the Los Alamos National Security, LLC for the DOE/NNSA

System Design Approach

• Radiation Tolerance to 20kRad

• Radiation immunity for FPGA configuration data

• Built-in test and diagnostics

• B-Field Immunity

• Flexible Grounding options

• EMI environment tolerant

• Moderate design challenge

• Compatible with existing PHENIX data collection system

• Meet LVL-1 timing

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Slide 9Operated by the Los Alamos National Security, LLC for the DOE/NNSA

ROC Features

• Radiation tolerant FPGA and SERDES

• Combines data from 52 FPHX chips

• Synchronization

• Removal of sync words

• ~17:1 data rate reduction

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Slide 10Operated by the Los Alamos National Security, LLC for the DOE/NNSA

ROC Concept PCB

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Slide 11Operated by the Los Alamos National Security, LLC for the DOE/NNSA

FEM Features

• VME Based

• Xilinx FPGA

• 4 FEMs per VME card

• 1:1 FEM to ROC ratio

• Store data by BCO clock and buffer for 64 BCO clocks

• Combine 4 FEM data streams and transmit to single DCM

• ~23:1 data rate reduction

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Slide 12Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Integrated System

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Slide 13Operated by the Los Alamos National Security, LLC for the DOE/NNSA

System Performance 1

• No impact on signal-to-noise or radiation length

• Capturing all event data

• Radiation Tolerance

• Immunity to configuration upsets

• Fits Mechanical and Thermal Design Parameters

• Fully Compatible with PHENIX Data systems

• Meets LVL-1 Timing

• Meets DCM Data requirements

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Slide 14Operated by the Los Alamos National Security, LLC for the DOE/NNSA

System Performance 2

• Sensor-to-ROC interconnect designed for EMI environment

• Co-Designed with VTX

• Designed for immunity to B-field

• Fully compatible with existing PHENIX data collection system

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Slide 15Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Concluding Remarks

• Status

• Next steps

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Slide 16Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Current Status

• Demonstrated ROC and FEM functionality

• System data collection requirements analyzed: LVL-1 and DCM requirements met

• No critical R&D issues for electronics hardware

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Slide 17Operated by the Los Alamos National Security, LLC for the DOE/NNSA

Next Steps

• Demonstrate 2.5 Gbit/sec FO Link

• Full up Prototype ROC, FEM and FO communications including integration with PHENIX data collection system (DCM)

• Engineering systems electronics and interconnections for Noise, EMI and Grounding requirements