The DAQ/HLT system of the ATLAS experiment

on behalf of the ATLAS TDAQ Community

The DAQ/HLT system of the ATLAS experiment

on behalf of the ATLAS TDAQ Community

Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

The DAQ/HLT system of the ATLAS experiment at CERN, Switzerland, is being commissioned for first collisions in 2009. Presently, the system is composed of an already very large farm of computers that accounts for about one-third of its final event processing capacity. Event selection is conducted in two steps after the hardware-based Level-1 Trigger: a Level-2 Trigger processes detector data based on regions of interest (RoI) and an Event Filter operates on the full event data assembled by the Event Building system. The detector read out is fully commissioned and can be operated at its full design capacity. This places the responsibility on the High-Level Triggers system to select only events of highest physics interest that will finally reach the offline reconstruction farms. This paper brings an overview of the current ATLAS DAQ/HLT implementation and performance based on studies originated from its operation with simulated, cosmic particles and first-beam data. Its built-in event processing parallelism is presented and discussed.

Original language	English (US)
Article number	044
Journal	Proceedings of Science
Volume	70
State	Published - Jan 1 2008
Event	12th Advanced Computing and Analysis Techniques in Physics Research, ACAT 2008 - Erice, Italy Duration: Nov 3 2008 → Nov 7 2008

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@article{5552d058b5714aa6b717ee62dd9c689f,

title = "The DAQ/HLT system of the ATLAS experiment",

abstract = "The DAQ/HLT system of the ATLAS experiment at CERN, Switzerland, is being commissioned for first collisions in 2009. Presently, the system is composed of an already very large farm of computers that accounts for about one-third of its final event processing capacity. Event selection is conducted in two steps after the hardware-based Level-1 Trigger: a Level-2 Trigger processes detector data based on regions of interest (RoI) and an Event Filter operates on the full event data assembled by the Event Building system. The detector read out is fully commissioned and can be operated at its full design capacity. This places the responsibility on the High-Level Triggers system to select only events of highest physics interest that will finally reach the offline reconstruction farms. This paper brings an overview of the current ATLAS DAQ/HLT implementation and performance based on studies originated from its operation with simulated, cosmic particles and first-beam data. Its built-in event processing parallelism is presented and discussed.",

author = "{on behalf of the ATLAS TDAQ Community} and {Dos Anjos}, Andr{\'e} and M. Abolins and R. Achenbach and C. Adorisio and P. Adragna and M. Aharrouche and G. Aielli and A. Al-Shabibi and I. Aleksandrov and G. Alexandre and A. Aloisio and Alviggi, {M. G.} and A. Amorim and N. Amram and K. Anderson and V. Andrei and X. Anduaga and S. Antonelli and F. Anulli and I. Aracena and S. Ask and B. {\AA}sman and G. Avolio and S. Backlund and E. Badescu and J. Baines and S. Banerjee and Barnett, {B. M.} and R. Bartoldus and S. Batraneanu and A. Battaglia and B. Bauss and P. Beauchemin and Beck, {H. P.} and C. Bee and P. Behera and P. Bell and Bell, {W. H.} and L. Bellagamba and M. Bellomo and {Ben Ami}, S. and M. Bendel and Y. Benhammou and K. Benslama and D. Berge and N. Berger and C. Bernius and T. Berry and M. Bianco and K. Johns",

note = "Publisher Copyright: {\textcopyright} 2008 Sissa Medialab Srl. All rights reserved.; 12th Advanced Computing and Analysis Techniques in Physics Research, ACAT 2008 ; Conference date: 03-11-2008 Through 07-11-2008",

year = "2008",

month = jan,

day = "1",

language = "English (US)",

volume = "70",

journal = "Proceedings of Science",

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T1 - The DAQ/HLT system of the ATLAS experiment

AU - on behalf of the ATLAS TDAQ Community

AU - Dos Anjos, André

AU - Abolins, M.

AU - Achenbach, R.

AU - Adorisio, C.

AU - Adragna, P.

AU - Aharrouche, M.

AU - Aielli, G.

AU - Al-Shabibi, A.

AU - Aleksandrov, I.

AU - Alexandre, G.

AU - Aloisio, A.

AU - Alviggi, M. G.

AU - Amorim, A.

AU - Amram, N.

AU - Anderson, K.

AU - Andrei, V.

AU - Anduaga, X.

AU - Antonelli, S.

AU - Anulli, F.

AU - Aracena, I.

AU - Ask, S.

AU - Åsman, B.

AU - Avolio, G.

AU - Backlund, S.

AU - Badescu, E.

AU - Baines, J.

AU - Banerjee, S.

AU - Barnett, B. M.

AU - Bartoldus, R.

AU - Batraneanu, S.

AU - Battaglia, A.

AU - Bauss, B.

AU - Beauchemin, P.

AU - Beck, H. P.

AU - Bee, C.

AU - Behera, P.

AU - Bell, P.

AU - Bell, W. H.

AU - Bellagamba, L.

AU - Bellomo, M.

AU - Ben Ami, S.

AU - Bendel, M.

AU - Benhammou, Y.

AU - Benslama, K.

AU - Berge, D.

AU - Berger, N.

AU - Bernius, C.

AU - Berry, T.

AU - Bianco, M.

AU - Johns, K.

PY - 2008/1/1

Y1 - 2008/1/1

N2 - The DAQ/HLT system of the ATLAS experiment at CERN, Switzerland, is being commissioned for first collisions in 2009. Presently, the system is composed of an already very large farm of computers that accounts for about one-third of its final event processing capacity. Event selection is conducted in two steps after the hardware-based Level-1 Trigger: a Level-2 Trigger processes detector data based on regions of interest (RoI) and an Event Filter operates on the full event data assembled by the Event Building system. The detector read out is fully commissioned and can be operated at its full design capacity. This places the responsibility on the High-Level Triggers system to select only events of highest physics interest that will finally reach the offline reconstruction farms. This paper brings an overview of the current ATLAS DAQ/HLT implementation and performance based on studies originated from its operation with simulated, cosmic particles and first-beam data. Its built-in event processing parallelism is presented and discussed.

AB - The DAQ/HLT system of the ATLAS experiment at CERN, Switzerland, is being commissioned for first collisions in 2009. Presently, the system is composed of an already very large farm of computers that accounts for about one-third of its final event processing capacity. Event selection is conducted in two steps after the hardware-based Level-1 Trigger: a Level-2 Trigger processes detector data based on regions of interest (RoI) and an Event Filter operates on the full event data assembled by the Event Building system. The detector read out is fully commissioned and can be operated at its full design capacity. This places the responsibility on the High-Level Triggers system to select only events of highest physics interest that will finally reach the offline reconstruction farms. This paper brings an overview of the current ATLAS DAQ/HLT implementation and performance based on studies originated from its operation with simulated, cosmic particles and first-beam data. Its built-in event processing parallelism is presented and discussed.

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M3 - Conference article

AN - SCOPUS:85055480223

SN - 1824-8039

VL - 70

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 044

T2 - 12th Advanced Computing and Analysis Techniques in Physics Research, ACAT 2008

Y2 - 3 November 2008 through 7 November 2008

ER -

The DAQ/HLT system of the ATLAS experiment

Abstract

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