rod r&d status

ROD R&D Status

K. Johns, C. Armijo, J. Steinberg (U. Arizona)H. Chen, F. Lanni, J. Mead (BNL)

L. Hervas (CERN) A. Meyer, A. Kielburg-Jeka, A. Straessner (Dresden)

G. Perrot (LAPP)G. Blasetti, M. Citterio (INFN, Milano)D. Schamberger (SUNY, Stony Brook)

Optical Link NotesCurrently we build with

Reflex Photonics SNAP12 Emcore SNAP12

Both specified @ 3.5 Gbps

Recent news/results Delivery date for Reflex Photonics SNAP12

@ 6.25 Gbps still +6 weeks First promised for July 1

Both RP and Emcore 3.5 Gbps versions can run at higher speeds Emcore shows better performance (up to 5

Gbps) based on measured BER2

Optical Link Notes

Designing @ 6.25 Gbps and beyond Measurements with AZ test board

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Optical Link NotesDesigning @ 6.25 Gbps and

beyond Vias degrade eye pattern No difference in trace length or layer

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Optical Link NotesIn order to move to higher optical

density we are now designing with Reflex Photonics LightABLE OE OSA is an IC with 12 channel GaAs VCSEL

or 12 channel GaAs PIN photodetector Connected electrically via wire bonds Connected optically via MT connector

Present speed @ 6.25 Gbps Designer provides an electrical footprint

on the PCB RP mounts (wirebonds) the OSA

OE part and mounting cost is ~$350 / die

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Optical Link Notes

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ATCA Sub-ROD Development (BNL)

Base Interface (Gigabit Ethernet)Fabric Interface (10Gig Ethernet)

Zone 3 (to transition module) LVL1 communication

Update ChannelGlobal Clocks

-48v Power Input and IPMI interface

12 fiber inputs on SNAP12 format

DDR2SODIMM Memory

Virtex-5 FXT FPGA

Power Conversion

Serial Debug Port

ATCA Sub-ROD Development AdvancedTCA 8U Module

With separated +5V power connector and Gigabit Ethernet connector on front panel, it allows testing of main functions without ATCA crate

IPMI development is underway, received development document and source code from DESY. Even though we use different processor, all the code is in C which helps software porting

One module was shipped to Dresden in late June/early July

High Speed Parallel Optical Links and FPGA SERDES Self loopback test works at 3.2Gbps on 12 channels, 40Gbps

total bandwidth Sub-ROD (and sub-ROD injector) still awaiting 75 Gbps

transceiver from Reflex Photonics Present plan is to do sub-ROD and sub-ROD injector

integration tests in October using Emcore parts which can run over spec

ATCA Sub-ROD Injector (AZ)

Sub-rod injector ATCA card also now available

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Testing with test ATCA backplane

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Details of test backplane

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Eventual testing in ATCA crate

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ROD in ATCA/AMC Form Factor

Present plan is to build processing units (ROD or ROD injectors) in AMC format on ATCA cards

ROBs would also reside in ATCA crate

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Up to 48 Fiber’s per AMC (4 - SNAP12)

LVL 1 Interface

Connection to ROB through ATCA

backplane using 10Gigabit Ethernet

AMC PU

AMC PU

AMC PU

AMC PU

ROD in ATCA/AMC Form Factor

AMC cards are Processing Units Contain optical receivers and FPGA based SERDES Perform energy calculations and partial Level-1 sums High speed, low latency connections for Level-1 sums

require communication between AMC modules and possibly between different ATCA carriers

Processing units can be developed independently of ATCA carrier board (using MicroTCA crate)

ATCA Carrier Board Provides connections between AMC modules and also

to ATCA backplane Low latency switching protocol Possible connection to ROB via 10G Ethernet Provides connections to rear transition board for Level-

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AMC Card using LOB

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4 x 12 channels per AMC card Stratix IV has 48 transceiver channels

@ 8.5 Gbps

4 AMC cards per ATCA (ROD)

AMC Card using LOB

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4 x 12 channels per AMC cardStratix IV has 48 transceiver channels @

8.5 Gbps

4 AMC cards per ATCA (ROD)

ATCA/AMC Form FactorWorking plan is to build ROD (and

ROS) cards on ATCA cards ROD receive modules in AMC format ROD injector transmit modules in AMC

format

ATCA sub-ROD already exists (BNL)ATCA sub-ROD injector now exists

(AZ) ATCA sub-ROD injector can also be used

to hold sub-ROD injector AMC card

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sLHC LAr ROD Upgrade R&DMailing list

[email protected] espace

https://espace.cern.ch/slhc-atlas-lar-rodPhone meeting

First meeting was organized on Sept. 11th, people from Univ. of Arizona, BNL, Dresden, LAPP and Stony Brook Univ. were connected

Goal was to update what everybody’s been working on and discuss how to proceed

Plan to continue this phone meeting once a month

Optical Link Notes

Designing @ 6.25 Gbps and beyond Hyperlynx SI software

Good for impedance estimation Less useful eye patterns (2.5 - 6 GHz

below)

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Eventual testing in ATCA crate

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rod r&d status

Documents