1-4 April 2004HEP 2004 D.Fassouliotis, UoA ATLAS Muon Chambers Construction in Greece Dimitris Fassouliotis Conference on RECENT ADVANCES IN PARTICLE AND ASTROPARTICLE PHYSICS HELLENIC SOCIETY FOR THE STUDY OF HIGH ENERGY PHYSICS University of the Aegean

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Outline Why? How? The ATLAS Muon Greek Laboratories The Present Status of the Greek Project The close future … providing the chamber services … test everything Parallel activities

1-4 April 2004HEP 2004 D.Fassouliotis, UoA The ATLAS Detector

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Aim: new discoveries Higgs  ZZ  4 μ

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Aim SM Higgs Discovery/Measurement H (130 GeV)-> ZZ * -> 4 μ σ mass = 1.4 GeV/c 2 H (300 GeV)-> ZZ -> 4 μ S/B for 10 fb -1 H (600 GeV)-> WW -> lν jj S/B for 100 fb -1

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Aim Electroweak and B Physics W transverse mass Aim for ΔΜ W <20 MeV/c 2 J/ψ ->2 μ σ mass = 40 MeV/c 2 B + -> J/ψ(μμ)K + σ mass = 26 MeV/c 2 S/B for 30 fb -1

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Aim SUSY searches e.t.c. H/A(300 GeV)->2 μ S/B for 30 fb -1 σ mass ~11 GeV/c 2 M ll Slepton mass determ. Resolution 1.3 GeV/c 2 S/B for 100 fb -1 M llq Squark search Cascade decays Endpoint fit

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Muon Spectrometer P T resolution Performance Requirements for such a rich physics program Combined with ID P T resolution Efficiency vs P T

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Precision in alignment (monitoring the detector position to 30μm) Precision in construction (control detector deformations below 20μm) The Challenge

1-4 April 2004HEP 2004 D.Fassouliotis, UoA The Greek Muon Chambers (BIS) The three Greek Laboratories: Barrel Inner Small Chambers University of Athens (UoA) MDT tube assembly National Technical University of Athens(NTUA) Quality Assurance/Quality Control of MDT tubes Aristotle University of Thessaloniki (AUTh ) MDT chamber assembly Transverse view of the Muon Spectrometer

1-4 April 2004HEP 2004 D.Fassouliotis, UoA The Greek ATLAS Muon Collaborating institudes UoA C. Kourkoumelis P. Ioannou D. Fassouliotis I. Hatziantonaki K. Nikolopoulos D. Pappas D. Agriogiannis NTUA M. Dris A. Filippas E. Gazis T. Alexopoulos E. Katsoufis T. Papadopoulou E. Fokitis Y. Tsipolitis S. Maltezos A. Tzamarioudaki P. Savva AUTh Ch. Petridou T. Liolios M. Manolopoulou S. Dedousis M. Chardalas D. Sampsonidis T. Lagouri K. Ypsilantis A. Krepouri C. Lamboudis K. Economou K. Filippousis

1-4 April 2004HEP 2004 D.Fassouliotis, UoA UoA – The tube assembly facility The upgraded Wiring table at UoA Tooling for crimping the copper pin of the endplug Tooling for crimping the wire MDT tube with the endplugs and the wire

1-4 April 2004HEP 2004 D.Fassouliotis, UoA tubes Mean tube length mm RMS 20μm QA/QC : Tube length measurement UoA – The tube assembly facility The tube assembly procedure with automatic data recording as seen by the operator

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Wire position measurement 20μm Dark Current and Wire Tension Measurements = =4.3μm NTUA -The QA/QC MDT Facility

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Gas Leak Test set-up NTUA -The QA/QC MDT Facility

1-4 April 2004HEP 2004 D.Fassouliotis, UoA AUTH - MDT Chamber construction Class Temperature  C Humidity  5%

1-4 April 2004HEP 2004 D.Fassouliotis, UoA The relative layer position of each tube layer is controlled to better than ±10 μm Y-direction (μm) Tube position in each layer Online QA/QC, Data login by operator AUTH - MDT Chamber construction σ = 5.1 μm σ = 5.7 μm RASNIK Towers Results on 112 chambers Y-direction (mm) X-direction (mm)

1-4 April 2004HEP 2004 D.Fassouliotis, UoA 800 tubes/month Tube and chamber production 4 years of continuous production: tubes assembled

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Tube QAQC results CategoryNumber of tubesPercentage (%) Total Good Crimping Wire broken Length finished Leak current Gas leak Wire location Wire tension580.20

1-4 April 2004HEP 2004 D.Fassouliotis, UoA X-ray Tomograph Results Checked Chambers < 20.0µm BIS 1C THE 095. January ÷ 14.4µm BIS 4A THE 062. May ÷ 13.9µm BIS 2A THE 042. May ÷ 14.0µm BIS 6A THE 078. April ÷ 14.5µm THE 022. August ÷ 14.5µm THE 018. March ÷ 14.5µm THE 024. March ÷ 14.5µm BIS EVROPI. April ÷ 13.9µm BIS CAMILLE. July ÷ 16.2µm BIS BEATRICE. June ÷ 16.8µm BIS ARTEMIS. August ÷ 18.2µm

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Present Status So … 112 excellent BIS chambers are ready. I hope you are convinced that the first phase of the project has been very successfully accomplished. But…

1-4 April 2004HEP 2004 D.Fassouliotis, UoA As a Greek proverb says : We have eaten the donkey…

1-4 April 2004HEP 2004 D.Fassouliotis, UoA … and remains the tail

1-4 April 2004HEP 2004 D.Fassouliotis, UoA However … it’s a long tail !

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services

1-4 April 2004HEP 2004 D.Fassouliotis, UoA End-plug assembly procedure  Measure end-plug diameter  Clean all components in ultrasonic bath with 100% ethyl alcohol.  Insert twister / stopper  Insert spring  Insert/crimp copper pin  Insert O-ring Daily operational tasks  Verification of 200 and 8 Atm pressures  Calibration of mechanical tension meter  Calibration of Tube Length fixing system  Calibration of Tube length measurement system  Check of alignment Wiring procedure  Place tube to first position / scan bar code  Thread wire in tube  Insert wire through the endplugs  Crimp wire on the left hand side  Move to second position / respect clocking  Pass wire through right hand side tube crimper  Fix length (choosing gaps) with movable crimper  Secure and Crimp tube  Perform pretension / tension  Crimp wire on the right hand side  Tube is ready QA/QC procedure  Finished tube Length measurement  Coaxiality measurement  Wire tension measurement  Dark Current measurement Tube verification  Measure wall thickness  Visual inspection/  Clean if needed Wire verification  Visual inspection  Throw part if needed Tube Assembly (A parenthesis)

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services the procedure  Preparatory activities Preparatory activities  Gas leak test Gas leak test  Installation 1 (before gas leak) Installation 1 (before gas leak)  Installation 2 (after gas leak) Installation 2 (after gas leak)  Electronic Noise test Electronic Noise test  Cosmic Ray test Cosmic Ray test  Database Database All Chambers should be fully equipped and qualified by the end of February man-years 78 Chambers at CERN 34 at Thessaloniki

1-4 April 2004HEP 2004 D.Fassouliotis, UoA BIS completion Gas Leak measurements with differential manometer Faraday Cages Gas system Electronics

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Parallel Activities Software and Analysis on Physics channels with muons  SM Higgs Search Combination of Muon and ID info (resolution improvement of ~30%) Z Constraint Fit application with BW Z distribution (resolution improvement of ~15%) Investigation of Misalignment effects on resolution and acceptance  Use of Z -> 2 μ for detector calibration  MSSM H/A -> 2 μ Search

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Parallel Activities II  Contribution to Moore / MuId (Muon Reconstruction ATLAS software)  Low P T muon tagging  Participation to Muon DCS group  Study of the response of MDTs to neutrons  Ageing studies using alpha particle irradiation  Setup of cosmic ray telescopes  GRID applications Participation to Cross-Grid European program Implementation of LCG 2 computing environment Aim to participate to ATLAS Data Challenges However there are not enough resources available Hellas GRID implementation very slow

1-4 April 2004HEP 2004 D.Fassouliotis, UoA Summary  The first phase of the Greek ATLAS Muon project has been completed extremely successfully. 112 excellent bare chambers are ready.  It is the first time that Greece has such a major contribution to such a large international experimental collaboration.  However, a lot of delicate work is still ahead, in order to complete the chambers with the gas, electronics and sensor components.  The same determination and effectiveness together with the provision of the needed resources will guarantee the successful accomplishment of the whole project.  Work has been started and continues stronger, to gain the physics wise benefits of this tremendous effort.

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services Preparatory Activities Prepare Gas Bars (4/chamber, 120 tubes/Bar, 3 o-rings/tube) Test Gas Bars  Prepare Piping for Gas Bar connection Prepare Piping for Gas Bar connection Prepare B Field sensor cables Prepare Alignment cables  Prepare Temperature cables Prepare Temperature cables  Prepare/buy Read-Out cables Prepare/buy Read-Out cables  Prepare/buy HV cables Prepare/buy HV cables Label all cables

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services Installation I Screw Ground Plates (exact placement important) Screw Ground Plates (exact placement important) Screw ground pins level 2 Set o-rings on tubes Install gas bar Screw signal caps with o-rings (exact torque important) Screw remaining ground pins Install gas piping for gas bar to gas entrance

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services Gas Leak Test Supply gas Ar-CO 2 3 Atm Supply gas Ar-CO 2 3 Atm Verify “1 st level” gas leak with gas detector Verify “1 st level” gas leak with gas detector Enter chamber in thermal insulating area  Perform gas leak test Perform gas leak test  Gas secure the detector Gas secure the detector

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services Installation II Install the Hedgehog cards (RO-HV) Install the Hedgehog cards (RO-HV) Test each individual channel for electrical characteristics Test each individual channel for electrical characteristics Fix remaining parts of Faraday cage  Fix Brackets Fix Brackets  Glue temperature sensors Glue temperature sensors Fix B Field sensors Fix alignment elements Secure mezzanines on Faraday cages Install mezzanines Provide cabling

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services Noise test Provide HV/ measure dark current Provide HV/ measure dark current Stand alone Data taking with random trigger Spot Noisy or inefficient channels Take action / keep info in database  Verify operation of all DCS related sensors Verify operation of all DCS related sensors (B-Field, Temperature, Alignment sensors)

1-4 April 2004HEP 2004 D.Fassouliotis, UoA …providing the services Cosmic Ray Test  Fully operational chamber Fully operational chamber Scintilator Trigger  “Final like” Data acquisition “Final like” Data acquisition  “Final like” DCS “Final like” DCS  Data run with Cosmics Data run with Cosmics  Final Qualification of chamber with all services Final Qualification of chamber with all services  Keep relevant information in DB Keep relevant information in DB