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ATLAS TileCal Timing
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
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2004 (English)In: CERN Note: ATL-TILECAL-2004-008Article in journal (Refereed) Published
Abstract [en]

The ATLAS TileCal digitizer boards are designed to compensate for time delays in the calorimeter modules. In this report a method is described to determine the time delays and how to correct for them. The analysis is made using testbeam pion data from 2002 and 2003. The result shows that the sampling clock of the digitizers in the barrel calorimeter can be adjusted in such a way that there always is one sample within 1.5 ns from the pulse peak.

Place, publisher, year, edition, pages
2004.
Keyword [en]
Timing, Calculated time, clock40des, digitizer, pipeline offset, in-clock
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-23474OAI: oai:DiVA.org:su-23474DiVA: diva2:192247
Available from: 2004-11-30 Created: 2004-11-30 Last updated: 2014-10-02Bibliographically approved
In thesis
1. Development and Test of the ATLAS Tile Calorimeter Digitizer
Open this publication in new window or tab >>Development and Test of the ATLAS Tile Calorimeter Digitizer
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The new LHC particle accelerator now being built at CERN will have a radically increased event rate and higher energy. To accommodate this, instrumentation for LHC experiments has had to be constructed using new ideas and the latest available technology. A part of this effort was the development and test of a digitizer unit for the hadron calorimeter (TileCal) of the ATLAS experiment.

To try out ideas and promote system integration, prototypes were tested in a subsystem using a particle beam to simulate the final conditions. During the development of these prototypes an application-specific integrated circuit was constructed to control the digitizer system. Tests made at the test beam facility have verified that all requirements were met.

The final digitizer design and its components were radiation tested to verify full functionallity in its radiation environment during the full ATLAS life-span. Test devices were also constructed to test all production units.

In addition to the digitizer system, an optical readout link was designed to meet the requirements for the digitizer readout.

Preliminary studies indicate that the digitizer could also be used in an upgraded LHC, with presently considered scenarios.

Place, publisher, year, edition, pages
Stockholm: Fysikum, 2004. 75 p.
National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-306 (URN)91-7265-973-4 (ISBN)
Public defence
2004-12-21, sal FD5, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 13:00 (English)
Opponent
Supervisors
Available from: 2004-11-30 Created: 2004-11-30 Last updated: 2010-01-11Bibliographically approved
2. Construction and Testing of the TileCal Digitizer and an Evaluation of the Discovery Potential for R-Hadrons at the ATLAS Detector at the LHC
Open this publication in new window or tab >>Construction and Testing of the TileCal Digitizer and an Evaluation of the Discovery Potential for R-Hadrons at the ATLAS Detector at the LHC
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis comprises two parts. In the first part an overview is given of the Standard Model, Supersymmetry and R-hadrons. R-hadrons are predicted within the framework of the Split-SUSY theory, in which the gluino can have a sufficiently long lifetime to hadronise into so-called R-hadrons. These will then propagate through the ATLAS detector as (meta)stable particles. The R-hadrons, which interact strongly, have the property of changing electric charge in interactions as they move through matter. In this thesis a strategy to search for R-hadrons with the ATLAS detcector is developed.

The second part describes the ATLAS detector and the developement of the digitizer system of the ATLAS hadronic calorimeter. The digitizer system is the digitial readout system, in which data is read out from the detector to data buffers via an optical link. In the LHC environment, the operation of radiation-hard circuitry is essential. Therefore a quality control program was used to control that the design conforms to the requirements of radiation tolerance. An important part of the work was to test the devices to study their functionality and properties. This work is described in this thesis.

Place, publisher, year, edition, pages
Stockholm: Fysikum, 2005. 66 p.
National Category
Subatomic Physics
Identifiers
urn:nbn:se:su:diva-746 (URN)91-7155-180-1 (ISBN)
Public defence
2005-12-16, sal FB42, AlbaNova universitetscenter, Roslagstullsbacken 21, Stockholm, 10:15
Opponent
Supervisors
Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2014-10-02Bibliographically approved

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