Top Banner
Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 ATLAS Cosmic Muon Reconstruction A Brief Tutorial
25

Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Jan 11, 2016

Download

Documents

Aileen Sherman
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.
Transcript
Page 1: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Tiesheng Dai & Steven GoldfarbUS–ATLAS Muon Alignment & Calibration Software Workshop

Boston University – 18 Dec 2008

Tiesheng Dai & Steven GoldfarbUS–ATLAS Muon Alignment & Calibration Software Workshop

Boston University – 18 Dec 2008

ATLAS Cosmic Muon ReconstructionA Brief Tutorial

ATLAS Cosmic Muon ReconstructionA Brief Tutorial

Page 2: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 2

Primary Goals Find cosmic muon data Reconstruct that data in the Muon Spectrometer with athena Create and Modify Calibration N-Tuples and AANT Analyze the data in those N-Tuples

Primary Goals Find cosmic muon data Reconstruct that data in the Muon Spectrometer with athena Create and Modify Calibration N-Tuples and AANT Analyze the data in those N-Tuples

The TutorialThe Tutorial

What We Won’t Do Explain athena or the Muon reconstruction algorithms Spend much time on the technical issues of installation / running Run in batch or on the grid (or therefore over many events) Debug, calibrate & align the detector (exercise for the student)

What We Won’t Do Explain athena or the Muon reconstruction algorithms Spend much time on the technical issues of installation / running Run in batch or on the grid (or therefore over many events) Debug, calibrate & align the detector (exercise for the student)

AANT

Raw Data

CalibrationN-Tuple

athena

Wiki Instructionshttps://hep.pa.msu.edu/twiki/bin/view/AGLT2/MuonReco

Wiki Instructionshttps://hep.pa.msu.edu/twiki/bin/view/AGLT2/MuonReco

Page 3: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 3

CERN Online Raw Data

/castor/cern.ch/grid/atlas/DAQ/2008

/castor/cern.ch/grid/atlas/DAQ/M7 (May-July 2008)

CERN Offline Data

/castor/cern.ch/grid/atlas/atlasdatadisk/data08_X/YX = 1beammag, calib, cos, cosmag, cvalid and idcomm, Y = RAW, AOD, ESD, CBNT, TAG

Common Castor Commands:nsls, rfdir, rfcp (see user guide in Software wiki pages)

AGLT2 (ATLAS Great Lakes Tier 2) /pnfs/aglt2.org/data/daits/mdaq/

NOTE: Muon Data Only (stripped to MDT, CSC, RPC, TGC, Trig)

DCACHE Commands: ls, dir, dccp

BNL (ATLAS Tier 1) [Muon Data Only of Run 91060] /pnfs/usatlas.bnl.gov/u06/daits/mdaq/

BU (ATLAS Tier 2) [Muon Data Only of Run 91060] NFS: /data4/bu/daits/mdaq/

More Information: http://atlas-runquery.cern.ch

Finding The DataFinding The Data

Page 4: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 4

DQ2

https://twiki.cern.ch/twiki/bin/view/Atlas/WorkBookDQ2 Setting Up DQ2

CERN : /afs/cern.ch/atlas/offline/external/GRID/ddm/DQ2Clients/setup.[c]sh AGLT2 : $LCG_ENV/grid_env.[c]sh and $DQ2_ENV/setup.[c]sh BNL : /afs/usatlas.bnl.gov/lcg/current/etc/profile.d/grid_env.[c]sh;

/afs/usatlas.bnl.gov/Grid/Don-Quijote/DQ2Clients/setup.[c]sh

• DQ2_LOCAL_SITE_ID = BNL-OSG2_DATATAPE

Grid Certificate Needed for voms-enabled proxy https://www.racf.bnl.gov/docs/howto/grid

Some Basic Commands: List: dq2-ls –f data08_cos.00091060.physics_TGCwBeam.daq.RAW.o4 Copy: dq2-get data08_cos.00091060.physics_TGCwBeam.daq.RAW.o4

But, what are you doing copying a raw data set, anyway? Better to run on the grid, at CERN, or at a Tier 1 or Tier 2 site.

Finding The DataFinding The Data

Page 5: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 5

The Scripts Tutorial Based on Scripts of Tiesheng

Installation of software and setup of environment Running of reconstruction and filling of n-tuples

Advantages Limited Time of Tutorial Simplicity & Robustness Provides Record of Full Procedure (Copy It!)

Where to Run the Scripts AGLT2 : ssh -Y myusername@AssignedNodeForYou (see mail of Bob Ball) OR ssh -Y [email protected] (X=1,2,3) CERN : ssh -Y [email protected] OR any CERN linux machine with AFS BNL : ssh -Y [email protected], rterm -i BU : ssh -Y [email protected] (no package checkout)

Installing & Running The SoftwareInstalling & Running The Software

Page 6: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 6

The Installation ScriptThe Installation Script

Example Usage:~daits/public/scripts/installProdMuonRec 14.5.0.1 -checkout MuonSpectrometer/MuonCalib/MuonCalibNtuple

Page 7: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Directories AtlasProduction/

cmthome : requirements file and initial setup scripts; MuonSpectrometer : any packages that were checked out; InstallArea : libraries and links for checked out packages; data08list : 2008 data file lists; runCtrl : python jobOption files and full setup script; job : Scripts to process data.

Caution: Script will not overwrite any existing package unless “update” option used.

• Still, be careful if you are editing files in the packages

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 7

The Installed EnvironmentThe Installed Environment

Note

By default, the Tier Centers install the distribution kits. The script option –KITDIR allows the user to point to one of those kits explicitly. If AthenaProduction was not included in that kit, the script will find the right tag for the release and install it.

Note

By default, the Tier Centers install the distribution kits. The script option –KITDIR allows the user to point to one of those kits explicitly. If AthenaProduction was not included in that kit, the script will find the right tag for the release and install it.

Page 8: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

The Run Scripts jobs/run_using_default

reads data directly (castor at CERN, DCACHE for BNL, AGL2) ESD not written

jobs/run_using_local_disk copies data to local area (/tmp/username) from DCACHE or castor

Both ESD writing turned off dataFileName and numberEvent can be specified as input to script

Examplemkdir test; cd test

../job/run_using_local_disk ! 10 Runs reconstruction on 10 events of the default data set

New Files Produced CalibrationNtuple.root ntuple.root (Muon AANT)

We’re Done!!! But, what did we do?

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 8

RunningRunning

Page 9: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Create cmthome/requirements According to the Machine / Environment

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 9

Inside InstallProdMuonRec (1)Inside InstallProdMuonRec (1)

use athena kit

kit location

install area

cvs kserver

Set up CMT environment for version of CMTsource $CMTDIR/$CMTVERS/mgr/setup.sh

Build the setup scriptscmt config

Page 10: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Install the package from the kit, using pacman

Example of a private installation:~daits/public/scripts/installProdMuonRec 14.5.0.1 -kitdir /afs/atlas.umich.edu/athena/

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 10

Inside InstallProdMuonRec (2)Inside InstallProdMuonRec (2)

Obtain AFS token (KERBEROS 4) if necessarykinit -4 [email protected]

Setting Up CVS and CMTCERN: CVSROOT=:gserver:isscvs.cern.ch:/local/reps/atlas; CMT=cmt

BNL: CVSROOT=/afs/usatlas.bnl.gov/software/cvs; CMT=bnl_cmt

AGLT2: CVSROOT=:kserver:atlas-sw.cern.ch:/atlascvs; CMT=cmt

BU Tier2: CVSROOT=:kserver:atlas-sw.cern.ch:/atlascvs; CMT=cmt

Page 11: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Setup ATHENA Environment Shell & athena Environment

/bin/sh

cd ~/work/p14.5.0.1

source ./runctrl/setup.sh

get AFS token if necessary

Check Out and Install Packages Explicit tag used when provided, else uses correct tag for Release

cmt show versions MuonSpectrometer/MuonReconstruction/MuonRecExample

Example checkout and build:cmt co –r MuonRecExample-01-01-20

MuonSpectrometer/MuonReconstruction/MuonRecExample (use bnl_cmt at BNL Tier 1)

cd ~/work/p14.5.0.1; unset CMTPATH; source cmthome/setup.sh –tag=32,14.5.0

cd MuonSpectrometer/MuonReconstruction/MuonRecExample/cmt;

source setup.sh; gmake

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 11

Inside InstallProdMuonRec (3)Inside InstallProdMuonRec (3)

Page 12: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Find and Link to Data File Lists According to user’s request

Generate Setup Script Example for AtlasProduction from Kit:

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 12

Inside InstallProdMuonRec (4)Inside InstallProdMuonRec (4)

Modify jobOptions to account for user’s requests, data sets, etc. MuonDataRec_myTopOptions.py

Generate run scripts for cosmics

Page 13: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Making Changes to the jobOptions and Running

mkdir myinstallarea/AtlasProduction/work

cd myinstallarea/AtlasProduction/work

source ../runCtrl/setup.sh

cp ../runCtrl/MuonDataRec_myTopOptions.py .Modify MuonDataRec_myTopOptions.py as you need.

athena.py –s MuonDataRec_myTopOptions.py

Running on More or Different Data Using Castor

https://twiki.cern.ch/twiki/bin/view/Atlas/WorkBookCastor

Using DCACHE https://www.racf.bnl.gov/Facility/dcache/ https://hep.pa.msu.edu/twiki/bin/view/AGLT2/DCacheNotes

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 13

Moving On After The TutorialMoving On After The Tutorial

Page 14: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

MuonDataRec_myTopOptions.py Settings for Tutorial

ESD output : rec.doWriteESD = False MDT segment T0 fit : muonRecFlags.doSegmentT0Fit = False Alignment correction : muonRecFlags.useAlignmentCorrections = True Detector Control (run 91897 with CSC) : muonRecFlags.doCSCs=False

Read Multiple Data Files athenaCommonFlags.BSRDOInput.set_Value_and_Lock([ ‘FILE1’, ‘FILE2’,…])

MuonRecFlags.py Where to Find the File

MuonSpectrometer/MuonReconstruction/MuonRecExample/python/

Modify with Care

More Examples Modified files

~daits/public/demo_for_14.5.0.1

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 14

More On jobOptionsMore On jobOptions

Page 15: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

MuonRecFlags.py Create New Flag: useMDTCalibSQLLite

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 15

Reading Calibration Constants From SQLLiteReading Calibration Constants From SQLLite

Add these lines after the useAlignmentCorrections flag to define this flag.

Add these lines after the useAlignmentCorrections flag to define this flag.

MuonReadCalib.py Change:

to:

Page 16: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

MuonSpectrometer/MuonCalib/MuonCalibNtuple/MuonCalibNtuple/MuonEventNtupleBranch.h Add line: int dummyForTest;

before: int eventNumber;

MuonSpectrometer/MuonCalib/MuonCalibNtuple/src/MuonEventNtupleBranch.cxx Add line: branchCreator.createBranch( tree, "dummyForTest" , &dummyForTest, "/I“ );

before: branchCreator.createBranch( tree, "eventNumber" , &eventNumber, "/I" ); Add line: dummyForTest = 1;

before: runNumber = eventInfo.runNumber();

Build the Code~daits/public/scripts/installProdMuonRec 14.5.0.1 -checkout no -compile

MuonSpectrometer/MuonCalib/MuonCalibNtuple

Run the Code../job/run_using_local_disk

Take a Quick Look at the N-Tuple to See if it Worked~daits/public/scripts/generator_cppfile_for_calibNtuple CalibrationNtuple.root mytest

more mytest.h

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 16

Adding Content to the Calibration N-TupleAdding Content to the Calibration N-Tuple

Here it is!Here it is!

Page 17: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

What To Use AANTP will NO LONGER be produced in central production Muon Calibration N-Tuple WILL be produced Tracking Contents

Moore Track Parameters in Calibration N-Tuple for 14.5.0.1 Muonboy Track Parameters in later releases (not yet segments)

Documentation Muon Calibration N-tuple

https://twiki.cern.ch/twiki/bin/view/Atlas/MuonCalibNtuple

Muon Spectrometer Nomenclaturehttps://hep.pa.msu.edu/twiki/pub/AGLT2/MuonReco/MS_Naming.ppt

Muon AANT for raw datahttps://twiki.cern.ch/twiki/bin/view/Atlas/MuonCommRawDataAna

Muon AANT for MOORE trackinghttps://twiki.cern.ch/twiki/bin/view/Atlas/MooreNtuple

Muon AANT for Muonboy trackinghttp://cern.ch/atlas-samusog/muonboy/DocNtuples/CBNT_Muon.html

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 17

More On the N-TuplesMore On the N-Tuples

Page 18: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

User Analysis Example: mytest Create a work area for analysis and run Tiesheng’s script

mkdir ~/work/p14.5.0.1/anal; cd ~/work/p14.5.0.1/anal

~daits/public/scripts/generate_cppfile_for_calibNtuple ../test/CalibrationNtuple.root mytest

Modify mytest.h to include more ntuple files: Replace mytest::mytest(TTree *tree) by

Or copy ~daits/public/muon_calib_ntup_demo/mytest.h

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 18

Analyzing The Calibration N-TupleAnalyzing The Calibration N-Tuple

root -lTFile *my = new TFile(“../test/calibrationNtuple.root")my->ls()my->cd("PatternNtupleMaker")Segments->MakeClass(“mytest").q

root -lTFile *my = new TFile(“../test/calibrationNtuple.root")my->ls()my->cd("PatternNtupleMaker")Segments->MakeClass(“mytest").q

Page 19: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

User Analysis Example: mytest (2) Add code to mytest.C

Here is an example from ~daits/public/muon_calib_ntup_demo/mytest.C

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 19

Analyzing The Calibration N-TupleAnalyzing The Calibration N-Tuple

Open new root file for outputOpen new root file for output

Write plots to root fileWrite plots to root file

Fill histogramsFill histograms

Book histogramsBook histograms

Make plotMake plot

Page 20: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

User Analysis Example: mytest (3) Perform the Analysis

~daits/public/scripts/run_cppfile mytest

Take a look at All_plots.pdf and mytest.root

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 20

Analyzing The Calibration N-TupleAnalyzing The Calibration N-Tuple

root -l.L mytest.Cmytest pp.Loop().q

root -l.L mytest.Cmytest pp.Loop().q

Page 21: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Some Expert Code Decoding the Identifiers:

~daits/public/scripts/muonfixedid.h

(Code from Ed Diehl to decode muonfixedid into type, station, eta, phi)

Checking and Merging N-Tuples:~daits/public/scripts/checknt.sh

(also from Ed)

Other examples out there from other experts

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 21

Useful Analysis Tools for Calibration N-TupleUseful Analysis Tools for Calibration N-Tuple

Page 22: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Similar to Calibration N-Tuple Create mytest.h and mytest.C

~daits/public/scripts/generate_cppfile_for_muonNtuple ../test/ntuple.root mytest

Modify the files as in Examples from Tiesheng for 14.5.0.1:~daits/public/muon_AA_ntup_demo/

Chaining AANT files:TChain *f = new TChain("CollectionTree");

Running the Analysis~daits/public/scripts/run_cppfile mytest

Note: N-Tuples are often Athena version-dependent!

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 22

Analysis of Muon AANTAnalysis of Muon AANT

Page 23: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Who To Ask When You Have Questions or Problems

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 23

ExpertsExperts

Topic Contact

Questions Specific to the Tutorial Tiesheng Dai, Steven Goldfarb

General Muon Software Issues [email protected], Stephane Willocq, Rosy Nikolaidou, Ed Moyse, Kevin Black

Finding the Data http://atlas-runquery.cern.ch, Tiesheng Dai

MOORE Reconstruction [email protected], Niels van Eldik

Muonboy Reconstruction [email protected], [email protected]

ATLAS Database Technical Issues [email protected], Vakho Tsulaia, Emil Obreshenkov

Muon COOL Database Monica Verducci

MDT Calibration Database Oliver Kortner, Domizia Orestano

Calibration N-Tuple & Software Felix Rauscher, Ed Diehl

MDT Alignment Christoph Amelung (Endcap), Pierre-Francois Giraud (Barrel)

MDT Alignment Software Rob Harrington

TGC Issues Masaya Ishino

CSC Issues Woochun Park, Michael Schernau

RPC Issues Gabriele Chodini

Page 24: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

What We Have Covered How to Find Raw Cosmic Muon Data How to Reconstruct that Data to Produce N-Tuples How to Add Information to those N-Tuples How to Analyze those N-Tuples

The Scripts Run them on the machine of your choice More Important: Copy them and use them as examples Available at CERN, BNL, AGLT2, BU

~daits/public/scripts/ ~daits/public/demo_for_14.5.0.1/ ~daits/public/muon_calib_ntup_demo/ ~daits/public/muon_AA_ntup_demo/

Enjoy!

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 24

SummarySummary

Page 25: Tiesheng Dai & Steven Goldfarb US–ATLAS Muon Alignment & Calibration Software Workshop Boston University – 18 Dec 2008 Tiesheng Dai & Steven Goldfarb US–ATLAS.

Merry Christmas and Happy New Year

Boston - 18 Dec 2008 T. Dai & S. Goldfarb - Univ of Michigan

MDT Config DB - Slide 25

Tiesheng’s Christmas CardTiesheng’s Christmas Card