1. CERN-RRB-2008-083 10th November 2008
ATLAS Progress
Report (part II)
(For the installation completion and hardware commissioning of the detector systems, as well
as the LHC shutdown planning: see Marzio Nessi in part I)
Trigger, computing, and data preparation
Brief account on other matters
- Forward detectors
- Operation tasks
sLHC upgrade organization and planning
Collaboration and management
Status of completion planning
Examples of early LHC physics goals
10-Nov-2008 ATLAS RRB
CERN-RRB

2. CB Executive Board TMB (Sub)-systems:
ATLAS management: SP, Deputy SPs, RC, TC
Collaboration Management, experiment execution, strategy, publications, resources, upgrades, etc.
Publications
Committee,
Speakers
Committee CB
TMB
Detector Operation
(Run Coordinator)
Detector operation during data taking, online data quality, …
Trigger
(Trigger Coordinator)
Trigger data quality,
performance, menu tables, new triggers, ..
Computing
(Computing Coordinator)
SW infrastructure, GRID,
data distribution, …
Data Preparation
(Data Preparation Coordinator)
Offline data quality,
first reconstruction of physics objects,
calibration, alignment
(e.g. with Zll data)
Physics
(Physics Coordinator)
optimization of algorithms for physics objects, physics channels
(Sub)-systems:
Responsible for operation and calibration of their sub-detector and for sub-system specific software …
10-Nov-2008 ATLAS RRB
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3. ATLAS Trigger / DAQ Data Flow
LVL2
Super-
visor
SDX1
CERN
computer
centre
DataFlow
Manager
Event
Filter
(EF)
pROS
~ 500
~1600
stores
output
dual-CPU nodes
~100
~30
Network
switches
Event data
pulled:
partial events
@ ≤ 100 kHz,
full events
@ ~ 3 kHz
Event rate
~ 200 Hz
Data
storage
Local
Storage
SubFarm
Outputs
(SFOs)
farm
Network switches
Builder
Inputs
(SFIs)
Second-
level
trigger
SDX1
pROS
stores
LVL2
output
Event data requests
Delete commands
Gigabit Ethernet
Requested event data
USA15
Regions Of Interest
USA15
Data of events accepted
by first-level trigger
1600
Read-
Out
Links
~150
PCs
UX15
VME
Dedicated links
Read-Out
Subsystems
(ROSs)
Read-
Out
Drivers
(RODs)
ATLAS
detector
RoI
Builder
First-
level
trigger
UX15
Timing Trigger Control (TTC)
Event data ≤ 100 kHz,
1600 fragments of ~ 1 kByte each
10-Nov-2008 ATLAS RRB
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4. (February and June-July)‏
ATLAS output disk (point-1)‏
Full Dress Rehearsal (FDR)‏
Played data through the computing system just as for real data from the LHC
started at point 1, like the real data
processed data at CERN Tier-0, various calibration & data quality steps
shipped out to the Tier-1s and Tier-2s for physics analysis
Complementary to “milestone runs” which test the real detector, but only with cosmic rays
Two “FDR runs”
(February and June-July)‏
Were a vital preparation for processing and analysing the first LHC data
Tier-0 and CAF
Tier-1 and Tier-2 sites
CERN-RRB
10-Nov-2008 ATLAS RRB

5. wLCG Grid: Tier-0 and the 10 ATLAS Tier-1s
8/3/2018
wLCG Grid: Tier-0 and the 10 ATLAS Tier-1s
10-Nov-2008 ATLAS RRB
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6. ATLAS during the Common Computing Readiness Challenge CCRC Phase 2
8/3/2018
ATLAS during the Common Computing Readiness Challenge
CCRC Phase 2
Data transfer Tier0--> Tiers-1
Nominal peak level (~1 GB/s) sustained over 3 days
10-Nov-2008 ATLAS RRB
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7. Number of world-wide ATLAS production jobs per day
8/3/2018
Number of world-wide ATLAS production jobs per day
from 1 May to 5 September 2008
10-Nov-2008 ATLAS RRB
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8. Excitement in the ATLAS Detector Control Room:
8/3/2018
Excitement in the ATLAS Detector Control Room:
The first LHC event on 10th September 2008
10-Nov-2008 ATLAS RRB

9. … as well as in the ATLAS Tier-0 and Data Quality Control Rooms:
8/3/2018
… as well as in the ATLAS Tier-0 and Data Quality Control Rooms:
Reconstruction follow-up and analysis of the first LHC events
CERN-RRB
10-Nov-2008 ATLAS RRB

10. The very first beam-splash event from the LHC in ATLAS
8/3/2018
The very first beam-splash
event from the LHC in ATLAS
on 10:19, 10th September 2008
Online display
Offline display
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11. A busy beam-halo event with tracks bent in
the Toroids from the start-up day (offline)

12. LVL1 System System is fully installed
Still large programme of work to be done to commission it with beam
Much work done with cosmic rays, test pulses, etc
Already made good start with single beam, starting on 10th September
Some aspects of commissioning can only be done with collision data
E.g. detailed time alignment of barrel muon trigger
Beam pickups
Minimum-bias (MBTS)
LUCID, BCM, etc
CERN-RRB

13. Timing-in the trigger 10 September
Experiment timing currently based on beam-pickup (“BPTX”) reference
First task of LVL1 central trigger team on 10th September was to commission the beam pickups
Times of arrival of other triggers are being adjusted to match
Plots show evolution from 10 to 12 September
Timing-in for down-stream side for single beam to have similar timing to collisions
Each LVL1 sub-system also needs to be timed in internally
L1-calo, L1-RPC, L1-TGC, MBTS, etc
12 September
(note different
scale, also RPC
not adjusted)
Note change of scale!
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14. High-Level Trigger LVL2 and Event Filter processor system installed
Full processing power will be added later
HLT has been used routinely online
Cosmic-ray selection to enhance purity of data samples for detector studies
E.g. data with TRT tracks
“Dummy” algorithms performed data streaming from 10th September
Based on HLT examination of LVL1 trigger type
Full set of algorithms available for collision running
Muon, electron, photon, tau, jet, MET, B-physics, etc
Very extensive studies performed on simulated raw-data events
Rate, efficiency and timing performance consistent with computing resources for initial running
Also have HLT menu for commissioning LVL2 and EF in single-beam and
900 GeV collisions operations
Raw data collected in the morning of 10th September were passed, offline, through some algorithms during the same day
Studies, tuning, etc. continue since then
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15. A nice cosmic muon through the whole detector…
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16. ray triggers are recorded, in total (left) as well as
A huge amount of cosmic
ray triggers are recorded,
in total (left) as well as
giving tracks also in the
smallest-volume detector,
the Pixels (below)
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17. Cosmic ray data-taking with HLT L2 ID algorithms
HLT has been deployed for the first time, running different L2 tracking algorithms,
running full ID reconstruction on L2
Overall efficiency ~ 97%
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18. Examples of ID commissioning analyses
Turn-on of transition radiation
produced from cosmic muons
(mm)
Mean x residuals (mm) of pixel barrel layer 0 (after various alignment steps)
SCT residuals
(will improve with better alignment and calibration)
10-Nov-2008 ATLAS RRB
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19. Examples of calorimeter commissioning analyses
EM cells
1 MeV
Pedestal stability: LAr EM (5 month period)
LAr wave 15GeV cosmics
Measured
Predicted
Difference
Precise knowledge is very important
for an accurate calibration
CERN-RRB

20. Examples of muon spectrometer commissioning analyses
RPC-MDT Correlation
8 inner +
6 middle +
6 outer hits
Good correlation between MDT
and RPC
Correlation between the momentum
measurement in the muon system
and in the Inner detector
10-Nov-2008 ATLAS RRB
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21. Zero Degree Calorimeter
Forward Detectors
LUCID at 17 m
ALFA at 240 m
ZDC at 140 m
Luminosity Cerenkov
Integrating Detector
Zero Degree Calorimeter
(Phase I detector
is operational)
(Plus an internal LoI for future Forward Proton detectors at 220 and 420 m
which is currently under internal review in the Collaboration)
Absolute Luminosity
for ATLAS 21 21

22. First hits in the LUCID detectors on Sep. 10th !
LV1C
MBTS
LUCID with beam 2
Lucid with beam 1
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23. Operation Task sharing is being put in place
A reminder of the framework:
The operation of the ATLAS experiment, spanning from detector operation to computing and data
preparation, will require a very large effort across the full Collaboration
(initially estimated at ~600 FTE effort per year, of which some 60% require presence at CERN)
The framework that has been approved by the Collaboration Board in February 2007 aiming at a fair
sharing of these duty tasks (‘Operation Tasks’, OTs) is now being implemented and the systems and
activity areas are using a dedicated Web tool for the planning and documentation
The main elements are:
- OTs needs and accounting are reviewed and updated annually
- OTs are defined under the auspices of the sub-system and activity managements
- Allocations are made in two steps, expert tasks first, and then non-expert tasks
- The ‘fair share’ is proportional to the number of ATLAS authors (per Institution or Country)
- Students are ‘favoured’ by a weight factor 0.75
- New Institutions will have to contribute more in the first two years (weight factors 1.5 and 1.25)
Note that physics analysis tasks, and other privileged tasks, are not OTs, of course
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24. Works well for shift planning – but some improvements needed for 2009
Fractional contributions of all Funding
Agencies as compared to expectation
(ideally should peak around 1.0)
Early experiences:
Works well for shift planning –
but some improvements needed
for 2009
Need to discuss/learn detailed
assessment for all other tasks
There are many tasks on the borderline between of duties and physics
Note that the example plots are
based on still incomplete data
FTEs per month entered in the OT data
base as a function of the month
10-Nov-2008 ATLAS RRB
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25. ATLAS organization to steer R&D for upgrades
(recalling from earlier RRBs)
ATLAS has, in place and operational, a structure to steer its planning for future upgrades, in
particular for R&D activities needed for possible luminosity upgrades of the LHC (‘sLHC’)
This is already a rather large and broad activity…
The main goals are to
- Develop a realistic and coherent upgrade plan addressing the physics potential
- Retain detector experts in ATLAS with challenging developments besides detector
commissioning and running
- Cover also less attractive (but essential) aspects right from the beginning
The organization has two major coordination bodies
Upgrade Steering Group (USG)
(With representatives from systems, software, physics, and relevant Technical
Coordination areas)
Project Office (UPO)
(Fully embedded within the Technical Coordination)
Upgrade R&D proposals are reviewed and handled in a transparent way within the Collaboration
There is a good and constructive synergy from common activities with CMS where appropriate
Detailed organization charts are
given in the Appendix of the slides
10-Nov-2008 ATLAS RRB
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26. Anticipated Peak and Integrated Luminosity
LHC, ATLAS and CMS have agreed to use this as a basis for planning as discussed at a LHCC meeting 1 July 2008
Sets the conditions and timescale
Phase 1 starts with 6 – 8 month shutdown end 2012
Peak luminosity 3 x cm-2 s-1 at end of phase 1
Phase 2 will start with an 18 month shutdown at end of 2016
Peak 10 x cm-2 s-1 in phase 2
3000 fb-1 integrated luminosity lifetime of detectors minimum in phase 2
Note that this was of
course before the LHC
incident, consequences
have not yet been
discussed
10-Nov-2008 ATLAS RRB
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27. Overview of Upgrade
10-Nov-2008 ATLAS RRB
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28. Upgrade milestones and schedule
(IBL means new
insertable pixel b-layer)
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29. At this stage the upgrade work and planning have grown already to a
substantial activity in the Collaboration
Major workshops, two recent examples:
- 4th Tracker upgrade workshop at Nikhef 5-7 Nov, more than 150 participants
- Joint LAr – Tile – Level1 calorimeter workshop November
- Two global upgrade weeks are planned for 2009 for converging to
an ATLAS sLHC LoI
Many ATLAS upgrade R&D projects are underway, within the internal review
framework already mentioned before:
- 15 approved projects
in the process of evaluation
- 11 at the stage of submitted Expressions of Interests
not approved (not relevant for ATLAS)
ATLAS is glad that the LHCC has also taken ‘on-board’ the task to overview sLHC
activities, in order to foster a coherent planning for machine and experiments
One issue to be addressed very soon is a dedicated budget line for
upgrade R&D steering, and preparing centrally for the upgrade design
A list of these ATLAS upgrade R&D
projects is given in the Appendix of
the slides
10-Nov-2008 ATLAS RRB
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30. Collaboration composition
Since the RRB in April 2008 there were three formal admissions of new Institutions in the Collaboration, following the standard procedures defined in the initial Construction MoU
The Collaboration Board welcomed with unanimous votes in its July 2008 meeting the
Julius-Maximilians-University of Würzburg, Germany
(Muon software, computing, sLHC R&D, outreach)
Palacký University in Olomouc, Czech Republic
(Fibre tracking in the forward Roman Pots)
University of Texas at Dallas, U.S.A.
(Pixels, computing)
In all three cases people have already been involved in ATLAS activities for a few years
The RRB is now invited to formally endorse these new collaborating Institutions
10-Nov-2008 ATLAS RRB
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31. ATLAS Collaboration 37 Countries 169 Institutions
(Status October 2008)
37 Countries
169 Institutions
2800 Scientific participants total
(1850 with a PhD, for M&O share)
Albany, Alberta, NIKHEF Amsterdam, Ankara, LAPP Annecy, Argonne NL, Arizona, UT Arlington, Athens, NTU Athens, Baku, IFAE Barcelona, Belgrade, Bergen, Berkeley LBL and UC, HU Berlin, Bern, Birmingham, UAN Bogota, Bologna, Bonn, Boston, Brandeis, Bratislava/SAS Kosice, Brookhaven NL, Buenos Aires, Bucharest, Cambridge, Carleton, CERN, Chinese Cluster, Chicago, Chile, Clermont-Ferrand, Columbia, NBI Copenhagen, Cosenza, AGH UST Cracow, IFJ PAN Cracow, UT Dallas, DESY, Dortmund, TU Dresden, JINR Dubna, Duke, Frascati, Freiburg, Geneva, Genoa, Giessen, Glasgow, Göttingen, LPSC Grenoble, Technion Haifa, Hampton, Harvard, Heidelberg, Hiroshima, Hiroshima IT, Indiana, Innsbruck, Iowa SU, Irvine UC, Istanbul Bogazici, KEK, Kobe, Kyoto, Kyoto UE, Lancaster, UN La Plata, Lecce, Lisbon LIP, Liverpool, Ljubljana, QMW London, RHBNC London, UC London, Lund, UA Madrid, Mainz, Manchester, CPPM Marseille, Massachusetts, MIT, Melbourne, Michigan, Michigan SU, Milano, Minsk NAS, Minsk NCPHEP, Montreal, McGill Montreal, RUPHE Morocco, FIAN Moscow, ITEP Moscow, MEPhI Moscow, MSU Moscow,
Munich LMU, MPI Munich, Nagasaki IAS, Nagoya, Naples, New Mexico, New York, Nijmegen, BINP Novosibirsk, Ohio SU, Okayama, Oklahoma, Oklahoma SU, Olomouc, Oregon, LAL Orsay, Osaka, Oslo, Oxford, Paris VI and VII, Pavia, Pennsylvania, Pisa, Pittsburgh, CAS Prague, CU Prague, TU Prague, IHEP Protvino, Regina, Ritsumeikan, UFRJ Rio de Janeiro, Rome I, Rome II, Rome III, Rutherford Appleton Laboratory, DAPNIA Saclay, Santa Cruz UC, Sheffield, Shinshu, Siegen, Simon Fraser Burnaby, SLAC, Southern Methodist Dallas, NPI Petersburg, Stockholm, KTH Stockholm, Stony Brook, Sydney, AS Taipei, Tbilisi, Tel Aviv, Thessaloniki, Tokyo ICEPP, Tokyo MU, Toronto, TRIUMF, Tsukuba, Tufts, Udine/ICTP, Uppsala, Urbana UI, Valencia,
UBC Vancouver, Victoria, Washington, Weizmann Rehovot, FH Wiener Neustadt, Wisconsin, Wuppertal, Würzburg, Yale, Yerevan

32. ATLAS Organization October 2008
Collaboration Board
(Chair: K. Jon-And
Deputy: C. Oram)
ATLAS
Plenary Meeting
Resources Review
Board
CB Chair Advisory
Group
Spokesperson
(P. Jenni
Deputies: F. Gianotti
and S. Stapnes)
ATLAS Organization
October 2008
Technical
Coordinator
(M. Nessi)
Resources
Coordinator
(M. Nordberg)
Executive Board
Inner Detector
(L. Rossi)
Tile Calorimeter
(B. Stanek)
Magnet System
(H. ten Kate)
Electronics
Coordination
(P. Farthouat)
Trigger
Coordination
(N. Ellis)
Data Prep.
Coordination
(C. Guyot)
Additional
Members
(T. Kobayashi,
M. Tuts, A. Zaitsev)
LAr Calorimeter
(I. Wingerter-Seez)
Muon
Instrumentation
(L. Pontecorvo)
Trigger/DAQ
( C. Bee,
L. Mapelli)
Commissioning/
Run Coordinator
(T. Wengler)
Computing
Coordination
(D. Barberis,
D. Quarrie)
Physics
Coordination
(D. Charlton)

33. ATLAS will undergo important leadership changes early next year
(Based on elections and appointments during the last two Collaboration Board meetings)
Management as from 1st March 2009:
Spokesperson Fabiola Gianotti (CERN)
Deputy Spokespersons Dave Charlton (Birmingham)
Andy Lankford (UC Irvine)
Technical Coordinator Marzio Nessi (CERN)
Resources Coordinator Markus Nordberg (CERN)
Collaboration Board as from 1st January 2009:
CB Chairperson Kerstin Jon-And (Stockholm)
CB Deputy Chairperson Gregor Herten (Freiburg)
10-Nov-2008 ATLAS RRB
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34. Updated Financial Overview
Financial framework
Initial Construction MoU MCHF
Updated construction baseline MCHF
Additional Cost to Completion (accepted in RRB October 2002) MCHF
based on the Completion Plan (CERN-RRB )
Additional CtC identified in 2006 and detailed in CERN-RRB ) MCHF
Total costs for the initial detector MCHF
Missing funding at this stage for the initial detector:
Baseline Construction MoU, mainly Common Fund MCHF
(of which 4.0 MCHF are in progress of being paid, and 3.2 MCHF remain at risk)
2002 Cost to Completion (CC and C&I) calculated shares MCHF
(of which 2.8 MCHF are in progress of being paid, and assuming that the
U.S. will provide their remaining 4.5 MCHF on a best effort basis,
1.9 MCHF remain at risk)
Note for planning purposes that the following items are not included:
- There occurred almost 2 MCHF additional manpower costs because of the delays in the
LHC start-up; as already mentioned previously, these were partially covered elsewhere,
not all CtC against HLT deferrals
- No provisions against future ‘force majeure’ costs
- Re-scoping of the design-luminosity detector, estimated material costs
of parts not included in present initial detector (CERN-RRB ) MCHF
- Forward detectors parts (luminosity) not fully funded yet MCHF
ATLAS gratefully appreciates that CERN has already secured its contribution to
re-scope the detector for its TDR design-luminosity capabilities in the coming 2 years

35. Cost to Completion, and initial staged detector configuration
As a reminder from previous RRB meetings:
The Cost to Completion (CtC) is defined as the sum of Commissioning and Integration (C&I)
pre-operation costs plus the Construction Completion (CC) cost in addition to the deliverables
The following framework was accepted at the October 2002 RRB
(ATLAS Completion Plan, CERN-RRB rev.):
CtC MCHF (sum of CC = 47.3 MCHF and C&I = 20.9 MCHF)
Commitments from Funding Agencies for fresh resources (category 1) 46.5 MCHF
Further prospects, but without commitments at this stage (category 2) 13.6 MCHF
The missing resources, 21.7 MCHF, have to be covered by redirecting resources from staging and
deferrals
The funding situation will be reviewed regularly at each RRB, and is expected to evolve as soon
as further resources commitments will become available
The physics impact of the staging and deferrals was discussed in detail with the LHCC
It was clearly understood that the full potential of the ATLAS detector will need to be restored
for the high luminosity running, which is expected to start only very few years after turn-on of
the LHC, and to last for at least a decade
10-Nov-2008 ATLAS RRB
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36. Cost to Completion Funding (kCHF) All CtC contributions
(Status CERN-RRB
31st October 2008)
All CtC contributions
as requested in 2002
are needed to complete
the payments for the
initial detector
configuration
(And in that case ATLAS
will also manage to cover
the CtC – 2 reported
in 2006 thanks to the
larger share contributed
by CERN)
10-Nov-2008 ATLAS RRB

37. Example of early physics: Top without / with b-tagging
Large cross section: ~ 830 pb
Reconstructed mass distribution after simple selection of tt  Wb Wb  ℓb qqb decays:
ATLAS 100 pb-1
after b-tag and
W-mass selection
ATLAS 100 pb-1
Cross section measurement (test of perturbative
QCD) with data corresponding to 100 pb-1 possible
with an accuracy of ±10-15%
Errors are dominated by systematics
(jet energy scale, Monte Carlo modeling (ISR, FSR),…)
Ultimate reach (100 fb-1): ± 3-5%
(limited by uncertainty on the luminosity)

38. Example of an early surprise:
Z’ → e+e- with SM-like couplings (ZSSM)
1 fb-1
m(ll) GeV
Mass Events / fb-1 Luminosity needed
(TeV) (after cuts) for a 5s discovery
+ (10 obs. events)
1 ~160 ~ pb-1
~ ~300 pb-1
2 ~7 ~ fb-1
ATLAS Preliminary
Discovery reach above Tevatron limits
m ~ 1 TeV perhaps already in (?)
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39. Search for Higgs Bosons
Standard Model
H → ZZ(*) → ℓℓ ℓℓ
Charged Higgs boson in
Supersymmetry (MSSM)
gb  t H+  jjb tn
ATLAS
L = 10 fb-1
L = 30 fb-1
tan b = 35
10-Nov-2008 ATLAS RRB
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40. Search for Supersymmetric Particles
L = 1 fb-1
ATLAS reach for (equal) Squark- and
Gluino masses:
0.1 fb  M ~ GeV
1 fb  M ~ GeV
10 fb  M ~ GeV
Deviations from the Standard Model
due to SUSY at the TeV scale can be
detected fast !
(Tevatron reach typically 400 GeV)
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41. Conclusions ATLAS is on track for the eagerly awaited LHC physics
The project proceeded within the framework of the accepted 2002 Completion Plan
All the resources requested in that framework are needed to cover the costs of the initial detector now installed (this will also cover the additional CtC costs as reported in 2006)
The experiment (detector hardware, trigger and DAQ, data distribution for distributed
analyses, data preparation which includes quality monitoring, calibrations and alignments …) was ready for the LHC start-up in September
With the first LHC beam-induced events, and the long cosmic ray data taking period,
ATLAS has demonstrated readiness for exploiting the LHC data
The worldwide LHC Computing Grid (WLCG) is the essential backbone for the ATLAS
distributed computing resources needed for the Analysis Model
ATLAS is on track for the eagerly awaited LHC physics
(ATLAS expects to remain at the energy frontier of HEP for the next years, and the Collaboration has
set in place a coherent organization to evaluate and plan for upgrades in order to exploit future LHC machine
high-luminosity upgrades)
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42. Appendices Upgrade organization charts List of upgrade R&D projects
Initial physics reach comparison for 10 vs 14 TeV
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43. Upgrade Organisation - overall
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44. Organisation - Steering Group
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45. Organisation - Project office and review office
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46. Updated list of ATLAS sLHC R&D proposals (3 slides for reference)
CERN-RRB

47. 10-Nov-2008 ATLAS RRB
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48. 10-Nov-2008 ATLAS RRB
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49. Appendix: Physics reach for 10 vs 14 TeV
At 10 TeV, more difficult to create high mass objects...
Below about 200 GeV, this suppression is <50%
(process dependent )
e.g. tt ~ factor 2 lower cross-section
Above ~2-3 TeV the effect is more marked
The plots of the talk are for √s=14 TeV
James Stirling
10-Nov-2008 ATLAS RRB
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