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Construction and Testing of the TileCal Digitizer and an Evaluation of the Discovery Potential for R-Hadrons at the ATLAS Detector at the LHC
Stockholm University, Faculty of Science, Department of Physics.
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: urn:nbn:se:su:diva-746ISBN: 91-7155-180-1 OAI: oai:DiVA.org:su-746DiVA: diva2:198336
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
List of papers
1. The ATLAS Tile Calorimeter Digitizer
Open this publication in new window or tab >>The ATLAS Tile Calorimeter Digitizer
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1999 In: IEEE Nuclear Science Symposium, Conference Record, Vol. 2, 760-764 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-24797 (URN)
Note
Part of urn:nbn:se:su:diva-746Available from: 2005-11-24 Created: 2005-11-24Bibliographically approved
2. An Optical Link Interface for the TileCalorimeter in ATLAS
Open this publication in new window or tab >>An Optical Link Interface for the TileCalorimeter in ATLAS
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0200 In: Proceedings of the Seventh Workshop on Electronics for LHC Experiments, Stockholm, Sweden, 179-181 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-24798 (URN)
Note
Part of urn:nbn:se:su:diva-746Available from: 2005-11-24 Created: 2005-11-24Bibliographically approved
3. Production and Test of the ATLAS Hadronic Calorimeter Digitizer
Open this publication in new window or tab >>Production and Test of the ATLAS Hadronic Calorimeter Digitizer
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2001 In: Proceedings of the Seventh Workshop on Electronics for LHC Experiments, Stockholm, Sweden, 305-308 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-24799 (URN)
Note
Part of urn:nbn:se:su:diva-746Available from: 2005-11-24 Created: 2005-11-24Bibliographically approved
4. Functional irradiation tests of the Atlas TileCal Digitizer using FPGA testbenches
Open this publication in new window or tab >>Functional irradiation tests of the Atlas TileCal Digitizer using FPGA testbenches
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2002 In: Proceedings of the Eight Workshop on Electronics for LHC Experiments, Colmar, France, 389-391 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-24800 (URN)
Note
Part of urn:nbn:se:su:diva-746Available from: 2005-11-24 Created: 2005-11-24Bibliographically approved
5. ATLAS TileCal Timing
Open this publication in new window or tab >>ATLAS TileCal Timing
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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.

Keyword
Timing, Calculated time, clock40des, digitizer, pipeline offset, in-clock
National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-23474 (URN)
Available from: 2004-11-30 Created: 2004-11-30 Last updated: 2014-10-02Bibliographically approved
6. ATLAS TileCal Digitizer Test System and Quality Control
Open this publication in new window or tab >>ATLAS TileCal Digitizer Test System and Quality Control
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2004 (English)In: CERN Note: ATL-TILECAL-2004-009Article in journal (Refereed) Published
Abstract [en]

This document describes the tests of the quality control procedure for the ATLAS TileCal digitizer unit. Since the ATLAS detector will fill most of the space in the detector cavity it will be difficult to disassemble parts of the detector. Therefore quality control is extremely important for every part of ATLAS. In Stockholm the digitizer units are tested in a testbench to ensure functionality and reliability in the ATLAS environment. The document includes a brief description of the ATLAS TileCal digitizer system and a description of the testbench setup. It also includes a description of the tests preformed and of the quality control procedure developed in Stockholm together with a production status.

Keyword
TileCal, Test system, Stockholm testbench
National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-23473 (URN)
Available from: 2004-11-30 Created: 2004-11-30 Last updated: 2014-10-02Bibliographically approved
7. A Strategy to Detect and Identify Gluino R-hadrons with the ATLAS Experiment at the LHC
Open this publication in new window or tab >>A Strategy to Detect and Identify Gluino R-hadrons with the ATLAS Experiment at the LHC
2005 (English)In: ATL-COM-PHYS, no 065Article in journal (Refereed) Published
Abstract [en]

The potential of the ATLAS detector at the LHC to detect and quantify the production of gluino R-hadrons is investigated. Using QCD-based models and a full detector simulation, a search strategy is outlined which uses the property that gluino R-hadrons can change the sign of their charge when propagating through matter. By comparing charged tracks in the Inner and Muon tracking systems, it is shown that this observable can be used to both detect and identify gluino R-hadrons of masses up to around 1 TeV in early LHC running

Place, publisher, year, edition, pages
Geneva: CERN, 2005
National Category
Accelerator Physics and Instrumentation
Identifiers
urn:nbn:se:su:diva-24803 (URN)
Note

Part of urn:nbn:se:su:diva-746

Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2014-10-16Bibliographically approved

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