NDLI: The configuration system of the ATLAS trigger

Content Provider	IEEE Xplore Digital Library
Author	Bell, P. J. Berge, D. Brunet, S. Fischer, G. Goebel, M. Haller, J. Head, S. Hocker, A. Kono, T. Martyniuk, A. Nozicka, M. Owen, M. Spiwoks, R. Stelzer, J. Wengler, T. Wiedenmann, W.
Copyright Year	2008
Description	Author affiliation: Department of Physics and Astronomy, University of Manchester, UK (Bell, P. J.; Head, S.; Martyniuk, A.; Owen, M.) \|\| Deutsches Elektronen-Synchrotron (DESY), Hamburg and Zeuthen, Germany (Brunet, S.; Fischer, G.; Goebel, M.; Haller, J.; Nozicka, M.; Stelzer, J.; Wengler, T.) \|\| European Laboratory for Particle Physics (CERN), Geneva, Switzerland (Berge, D.; Hocker, A.; Kono, T.; Spiwoks, R.) \|\| Department of Physics, University of Wisconsin, Madison, USA (Wiedenmann, W.)
Abstract	The ATLAS detector at CERN’s LHC will be exposed to proton-proton collisions at a rate of 40 MHz. To reduce the data rate, only potentially interesting events are selected by a three-level trigger system. The first level is implemented in firmware, reducing the data output rate to about 100 kHz. The second and third levels are software triggers with an output rate of about 200 Hz. A system has been designed and implemented that hosts and records the configuration of all three trigger levels at a centrally maintained location. This system consistently provides configuration information to the online trigger for the purpose of data taking as well as to the offline trigger simulation. The use of relational database technology provides means of flexible information browsing, easy information distribution across the ATLAS reconstruction sites and reliable recording of the trigger configuration history over the lifetime of the experiment. The functionality of this design has been demonstrated in dedicated configuration tests of the ATLAS level-1 Central Trigger and of a 600-node software trigger computing farm. We present the current status of the system and its readiness for data taking. We put emphasis on the multiple use of the trigger configuration for data-taking, Monte-Carlo simulation and trigger validation.
Starting Page	2614
Ending Page	2616
File Size	2975765
Page Count	3
File Format	PDF
ISBN	9781424427147
ISSN	10957863
DOI	10.1109/NSSMIC.2008.4774894
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Large Hadron Collider Mesons Physics Protons Radiation detectors Semiconductor radiation detectors Magnetic field measurement Nuclear and plasma sciences Astronomy Laboratories
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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