Transcript Document
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, A. Bazan, F. Bellachia, I. Wingerter-Seez (LAPP) M. Citterio (INFN, Milano) D. Schamberger (SUNY, Stony Brook)
Optical Link Notes
Currently we build with Reflex Photonics SNAP12 Emcore SNAP12 Both specified @ 3.3 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 3.3 Gbps versions can run at higher speeds Emcore shows better performance (up to 5 Gbps) based on measured BER 2
Optical Link Notes
Designing @ 6.25 Gbps and beyond Measurements with AZ test board 8 inches 2x8 inches and via 3.2 inches 8 inches 3
Optical Link Notes
Designing @ 6.25 Gbps and beyond Vias degrade eye pattern No difference in trace length or layer 4
Optical Link Notes
In order to move to higher optical density we are now designing with Reflex Photonics LightABLE OE OE 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 5
Optical Link Notes
6
ATCA Sub-ROD Development (BNL)
12 fiber inputs on SNAP12 format Virtex-5 FXT FPGA Serial Debug Port Zone 3 (to transition module) LVL1 communication Update Channel Global Clocks DDR2 SODIMM Memory Base Interface (Gigabit Ethernet) Fabric Interface (10Gig Ethernet) -48v Power Input and IPMI interface Power Conversion
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, using development document and source code from DESY. Even though we use different processor, all the code is in C which helps software porting One sub-ROD 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 transceivers from Reflex Photonics Present plan is to do another round of sub-ROD and sub-ROD injector integration tests in October using Emcore parts which can run over spec (~5 Gbps)
ATCA Sub-ROD Injector (AZ)
Sub-rod injector ATCA card also now available 9
ATCA Sub-ROD Injector (AZ)
Testing with test ATCA backplane 10
ATCA Sub-ROD Injector (AZ)
Details of test backplane 11
ATCA Sub-ROD Injector (AZ)
Eventual testing in ATCA crate We received this demo model from ASIS 12
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 AMC PU LVL 1 Interf ace Up to 48 Fiber’s per AMC (4 - SNAP12) AMC PU AMC PU AMC PU Connection to ROB through ATCA backplane using 10Gigabit Ethernet 13
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 1 sums 14
AMC Card using LOB
4 x 12 channels per AMC card Stratix IV has 48 transceiver channels @ 8.5 Gbps 4 AMC cards per ATCA (ROD) EPROM DDR3 PCI Express Driver Flash Ethernet Microcontroller 15
AMC Card using LOB
4 x 12 channels per AMC card Stratix IV has 48 transceiver channels @ 8.5 Gbps 4 AMC cards per ATCA (ROD) 16
AMC Sub-ROD
Two ATCA boards per half barrel FEC FEB/SNAP12 x 4 AMC cards = 8 FEBs Assumes 10 Gbps transmission One ATCA board per half barrel FEC 4 optical connectors / AMC card x 1 FEBs This eliminates data transmission MTP Connector MT Connector Disassembly of MTP Connector ferrules and package them in a push-pull easy connection The width of MTP connector is ~15mm, which is more than twice of Molex high density optical MT connectors Circular MT: single MT ferrule, 12 to 72 fibers per ferrule 1x6 Array: 6 MT ferrules, 12 fibers per ferrule Both Molex and Tyco offer high density
sLHC LAr ROD Upgrade R&D
Mailing list [email protected]
CERN espace https://espace.cern.ch/slhc-atlas-lar-rod Phone meeting First meeting was organized on Sept. 11 th ; 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