The The Snap-12 Snap-12 SnooperSnooperAlbert DelpAlbert Delp

University of ArizonaUniversity of ArizonaMentors: Ken Johns, Joel Steinberg, Dan Mentors: Ken Johns, Joel Steinberg, Dan

TompkinsTompkins

The Large Hadron Collider (LHC) at CERN

The ATLAS Experiment

Discovering the Higgs Boson

This project is part of an ATLAS Super This project is part of an ATLAS Super LHC research and development effortLHC research and development effort

At the LHC data will be processed at At the LHC data will be processed at approximately 1 Terabit/secondapproximately 1 Terabit/second

Data is transferred over a large Data is transferred over a large number of optic cablesnumber of optic cables

Due to the large number of Due to the large number of connections it is desirable to know connections it is desirable to know the quality of the transmission signalthe quality of the transmission signal

ENTER THE SNAP 12 ENTER THE SNAP 12 SNOOPERSNOOPER

Motivation

What Does This Device What Does This Device Do?Do?

FunctionalityFunctionality Signal Detect Test- This will check to Signal Detect Test- This will check to

see if a signal is being sent through see if a signal is being sent through the fiber optic cable.the fiber optic cable.

Synchronization Test- Checks that the Synchronization Test- Checks that the information being transmitted is in information being transmitted is in the proper format.the proper format.

BIST Test- Industry standard test to BIST Test- Industry standard test to check for errors in the coding of the check for errors in the coding of the output informationoutput information

Planning…Lots of Planning…Lots of planningplanning

Schematic DesignSchematic Design

Schematic LayoutSchematic Layout

*picture of pads layout**picture of pads layout* *describe what this stage of layout is *describe what this stage of layout is

used for (maps out all the parts and used for (maps out all the parts and how they are connected onto the how they are connected onto the board)*board)*

FPGA DesignFPGA Design

ConclusionsConclusionsWe have developed a SNAP-12 Snooper that checks the signal integrity on Snap-12 fibers

My role included all aspects- design, layout, firmware, and testing.

Signal Detect Test – successfully implemented and verified

Synchronization Test – firmware completed

BIST Test – firmware in progress

Plan is to use in the field by the summer of 2009