Normal text - click to edit CHEP 2007 – Victoria Sebastian.Bablok@ui Alice HLT Online Calibration framework 1/ High Level Trigger Online Calibration framework in ALICE CHEP 2007 – Victoria (02.09. – 07.09.2007) Sebastian Robert Bablok (Department of Physics and Technology, University of Bergen, Norway) for the ALICE HLT Collaboration (see last slide for complete list of authors)
27
Embed
Sebastian Robert Bablok (Department of Physics and Technology, University of Bergen, Norway)
High Level Trigger Online Calibration framework in ALICE CHEP 2007 – Victoria (02.09. – 07.09.2007). Sebastian Robert Bablok (Department of Physics and Technology, University of Bergen, Norway) for the ALICE HLT Collaboration (see last slide for complete list of authors). Outline. - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Taxi portal:Fetches latest available calibration settings from the OCDB
pre-produced or in former runs calculated calibration objects enveloped in ROOT-files (can be directly used by ALICE analysing framework - AliRoot CDB access classes transparent access for analysis code if running online or offline)
Caches calibration data locally in the HLT (HLT Conditions DataBase - HCDB)
Retrieval is performed asynchronously to run
HCDB distributed to nodes with the Detector Algorithms (DAs)copied locally to the DA nodes before each run fixed version per run
HLT consists of a large computing farmmatching the structure of the ALICE detectors.
Interfaces with the other systems of ALICE (online and offline) enables data exchange with the connected parts.
HLT allows for detector performance- and physics monitoring and calibration online.
With the presented mechanism the HLT will be able to provide all required conditions and calibration settings to the Analysis Software for first physics in ALICE 2008.
ALICE HLT Collaboration Sebastian Robert Bablok, Oystein Djuvsland, Kalliopi Kanaki, Joakim Nystrand, Matthias Richter,
Dieter Roehrich, Kyrre Skjerdal, Kjetil Ullaland, Gaute Ovrebekk, Dag Larsen, Johan Alme(Department of Physics and Technology, University of Bergen, Norway)
Torsten Alt, Volker Lindenstruth, Timm M. Steinbeck, Jochen Thaeder, Udo Kebschull, Stefan Boettger, Sebastian Kalcher, Camilo Lara, Ralf Panse
(Kirchhoff Institute of Physics, Ruprecht-Karls-University Heidelberg, Germany)
Harald Appelshaeuser, Mateusz Ploskon(Institute for Nuclear Physics, University of Frankfurt, Germany)
Haavard Helstrup, Kirstin F. Hetland, Oystein Haaland, Ketil Roed, Torstein Thingnaes(Faculty of Engineering, Bergen University College, Norway)
Kenneth Aamodt, Per Thomas Hille, Gunnar Lovhoiden, Bernhard Skaali, Trine Tveter(Department of Physics, University of Oslo, Norway)
Indranil Das, Sukalyan Chattopadhyay (Saha Institute of Nuclear Physics, Kolkata, India)
Bruce Becker, Corrado Cicalo, Davide Marras, Sabyasachi Siddhanta(I.N.F.N. Sezione di Cagliari, Cittadella Universitaria, Cagliari, Italy)
Jean Cleymans, Artur Szostak, Roger Fearick, Gareth de Vaux, Zeblon Vilakazi(UCT-CERN, Department of Physics, University of Cape Town, South Africa)
ECS:Controls the HLT via well defined states (SMI++)Provides general experiment settings (type of collision, run number, …)
DCS:Provides HLT with current Detector parameters (voltages, temperature, …) Pendolino, (DCS HLT) Provides DCS with processed data from the HLT (TPC drift velocity, …) FED-portal, (HLT DCS)
OFFLINE:Interface to fetch calibration settings from the OCDB Taxi, (OFFLINE HLT) Feeding back new calibration data to OCDB Shuttle-portal, (HLT OFFLINE)
HOMER:HLT interface to AliEve for online (event) monitoring
FEE:stream in of raw event data via H-RORCs
DAQ:stream out of processed data and trigger decisions to DAQ-LDCs