28 June 2015 to 3 July 2015
Africa/Johannesburg timezone
SAIP2015 Proceeding published on 17 July 2016

Online energy reconstruction on ARM for the ATLAS TileCal sROD co-processing unit

3 Jul 2015, 12:10
20m
Oral Presentation Track B - Nuclear, Particle and Radiation Physics NPRP

Speaker

Mr Mitchell Cox (University of the Witwatersrand)

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Modern Big Science projects such as the Large Hadron Collider at CERN generate enormous amounts of raw data which presents a serious computing challenge. After planned upgrades in 2022, the data output from the ATLAS Hadronic Tile Calorimeter (TileCal) will increase by 200 times to over 40 Tb/s. This increase requires more advanced processing on the raw data in order to harness a larger quantity of good quality physics data. An algorithm called optimal filtering is currently used in the TileCal front-end for online energy reconstruction of the digitised photo-multiplier tube signals and is currently implemented on Digital Signal Processors (DSPs) and Field Programmable Gate Arrays (FPGAs) which are difficult to program and expensive. It is proposed that a cost-effective, high data throughput and general purpose Processing Unit (PU) can be developed by using several commodity ARM processors while maintaining minimal software design difficulty for the end-user. This PU could be used for a variety of high-level algorithms other than optimal filtering on the high data throughput raw data to combat the issue of out of time pile-up and for online data quality testing. Optimal filtering and histogram algorithms have been implemented in C++ and several ARM platforms have been tested and shown to have good CPU to external I/O balance.

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

msc

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

yes

Main supervisor (name and email)<br>and his / her institution

Bruce Mellado (bruce.mellado@wits.ac.za) Wits

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

yes

Primary author

Mr Mitchell Cox (University of the Witwatersrand)

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