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CERN-RRB-2006-109 23 rd October 2006 ATLAS Progress Report. Collaboration and management Construction status of the detector systems (Common Projects and installation: see Marzio Nessi’s presentation) Milestones and schedule Brief account on other activities

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CERN-RRB-2006-109 23rd October 2006

ATLAS Progress


Collaboration and management

Construction status of the detector systems

(Common Projects and installation:

see Marzio Nessi’s presentation)

Milestones and schedule

Brief account on other activities

Computing and physics preparation

Status of Completion Planning



Collaboration composition

Since the last RRB in April 2006 seven Expressions of Interests to join the ATLAS Collaboration

have been concluded with unanimous admission votes at the Collaboration Boards of 14th July and 6th October

For them the discussions and negotiations for their contributions have been constructive and

mutually beneficial

This means in particular that in each case necessary technical service tasks and contributions have been identified, besides involvements in physics

For a number of other groups we have encouraged them to join forces at this stage with existing ATLAS Institutions (in addition some other contacts have not been pursued)

There are no pending Expressions of Interest on the time scale of the April 2007 RRB

The Collaboration took also note of the withdrawal of Naruto University of Education, Tokushima, Japan, which has completed its initially expected contribution to ATLAS

(GEANT4 development work)


New Institutions unanimously admitted by the ATLAS Collaboration

Fachhochschule Wiener Neustadt (FHWN), Wiener Neustadt, Austria

(Technical expertize in system integrations, Grid computing)

University of Regina, Physics Department, Regina, Canada

(Software tools, LAr calibrations and commissioning)

DESY (Hamburg and Zeuthen), Germany

(HLT, Grid computing, shower simulations)

Humboldt University Berlin, Institute of Physics, Berlin, Germany

(HLT, commissioning, computing, working very closely with DESY)

Nagoya University, Department of Physics, Nagoya, Japan

(TGC trigger and DAQ)

New York University, Department of Physics, New York, U.S.A.

(HLT algorithms for level-2 and EF, commissioning, power systems for upgrades)

SLAC, Stanford, U.S.A.

(Pixels – hard and software, HLT, simulations, Grid computing)

The RRB is kindly requested to endorse the admission of these seven

new Institutions in the ATLAS Collaboration


ATLAS Collaboration

(As of the October 2006)

35 Countries

164 Institutions

1800 Scientific Authors total

(1470 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, Bologna, Bonn, Boston, Brandeis, Bratislava/SAS Kosice, Brookhaven NL, Buenos Aires, Bucharest, Cambridge, Carleton, Casablanca/Rabat, CERN, Chinese Cluster, Chicago, Clermont-Ferrand, Columbia, NBI Copenhagen, Cosenza, AGH UST Cracow, IFJ PAN Cracow, DESY, Dortmund, TU Dresden, JINR Dubna, Duke, Frascati, Freiburg, Geneva, Genoa, Giessen, Glasgow, 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, Mannheim, CPPM Marseille, Massachusetts, MIT, Melbourne, Michigan, Michigan SU, Milano, Minsk NAS, Minsk NCPHEP, Montreal, McGill Montreal, 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, 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, Rochester, 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, Uppsala, Urbana UI, Valencia, UBC Vancouver, Victoria, Washington, Weizmann Rehovot, FH Wiener Neustadt, Wisconsin, Wuppertal, Yale, Yerevan


Management and Collaboration Board

Following the standard procedures and schedule, the Collaboration Board has elected a new Deputy Collaboration Board Chairperson, who will then become CB Chair afterwards

Kerstin Jon-And (Stockholm University)

Deputy CB Chair 2007 (and 2010), CB Chair 2008 – 2009

She will replace Siegfried Bethke (MPI Munich) whose term of office finishes at the end of this year

The Collaboration Board has also endorsed the re-appointments for the term of office March 2007 to February 2009 for

Marzio Nessi Technical Coordinator

Markus Nordberg Resources Coordinator

The CERN Management has approved formally these appointments

Further appointments in managerial positions are included in the following organization chart


Collaboration Board

(Chair: C. Oram

Deputy: S. Bethke)


Plenary Meeting

Resources Review


CB Chair Advisory



(P. Jenni

Deputies: F. Gianotti

and S. Stapnes)

ATLAS Organization

October 2006



(M. Nessi)



(M. Nordberg)

Executive Board

Inner Detector

(L. Rossi,

K. Einsweiler

P. Wells, F. Dittus)

Tile Calorimeter

(B. Stanek)

Magnet System

(H. ten Kate)



(P. Farthouat)

Data Prep.


(C. Guyot)



(H. Gordon,

A. Zaitsev)

LAr Calorimeter

(H. Oberlack,

D. Fournier,

J. Parsons)

Muon Instrum.

(G. Mikenberg,

F. Taylor,

S. Palestini)


( N. Ellis,

L. Mapelli)



(D. Barberis,

D. Quarrie)



(I. Hinchliffe)


Construction progress of the detector systems

(The Common Projects and installation will be covered by M Nessi)

ATLAS superimposed to

the 5 floors of building 40

Diameter 25 m

Barrel toroid length 26 m

End-cap end-wall chamber span 46 m

Overall weight 7000 Tons


The Underground

Cavern at Pit-1 for

the ATLAS Detector

Side C

Side A

Length = 55 m

Width = 32 m

Height = 35 m


Inner Detector (ID)

The Inner Detector (ID) is organized

into four sub-systems:

Pixels (0.8 108 channels)

Silicon Tracker (SCT)

(6 106 channels)

Transition Radiation

Tracker (TRT)

(4 105 channels)

Common ID items

inner detector progress summary
Inner Detector progress summary
  • Pixels:Barrel layer-2 has been integrated
      • Low mass Al cables (from modules to first patch panel) had low yield (broken insulator). Solved with new production. Integration schedule tight, but speed is now higher than planned.
  • Barrel:SCT and TRT barrel integrated in SR1. Tested with cosmics (no x-talk
  • observed). Installed in the pit. Weighing
  • demonstrates good understanding of
  • material.
  • EC:SCT ECC has been integrated very
  • recently with TRT ECC after all tests were done on sub-assemblies. SCT ECA is dressing its thermal enclosures and will be ready for integration with TRT by mid November. The schedule is driven by SCT ECA.
  • The schedule for the Inner Detector remains very tight, without any float left (critical path: Installation and “sign-off” in the pit)

Barrel TRT

TRT+SCT barrel completed in SR1

id trt sct barrel tested in sr1
ID TRT + SCT barrel tested in SR1

One-eighth of the TRT and one-quarter of the SCT were equipped with complete readout chains

Dead channels: 0.2% SCT, 1.5% TRT

Noise level as for the individual parts and below specs (e.g. SCT random noise prob. is 4.5 10-5, spec = 5 10-4)

No cross talk measured (many trials done)

4 105 cosmics trigger taken

TRT %noise occupancy before-after insertion

Side view of a cosmic track trough TRT and SCT, noise is small

id barrel travels to the pit 24 th aug 2006
ID barrel travels to the pit, 24th Aug 2006

A tight fit between BT and EC Calorimeter

Through the parking area

From the trolley to the support rails

Inside cryostat

id end caps

TRT + SCT integration of EC-C was done end of September,

the A side will follow in November

ID End-Caps

EC-C integration TRT + SCT

SCT ECC, in front of its

outer thermal enclosure



All modules have been delivered with

good yield

Both EC have been integrated, delivered

to CERN and acceptance-tested

One EC will now go through cosmics tests

Barrel stave production did finish mid September

(including corrosion leak repairs)

Layer-2 has been fully integrated, the two Layer-1

half-shells are finished, and about 1/3 of the B-layer

bi-staves assembled

The best staves (least dead channels, best

thermal performance) are reserved for the


A new potential issue under investigation are

failing opto-boards (integrated in service panels)

Pixel ECC at CERN, 3 disks visible


Pixel Layer-2 – half shell

Pixel Layer2, once clamped, outside

Ready for installation date is 1st April 2007

Pixel Layer2, once clamped, inside


LAr and Tile Calorimeters

Tile barrel

Tile extended barrel

LAr hadronic

end-cap (HEC)

LAr EM end-cap (EMEC)

LAr EM barrel

LAr forward calorimeter (FCAL)


Barrel LAr and Tile Calorimeters

The barrel calorimeters are in their final position at the centre of the detector since

November 2005

The final cool-down of the LAr cryostat took place over April and May 2006

Calorimeter barrel after its move

into the center of the detector

(4th November 2005)


LAr barrel history over the past months

  • June: Barrel filled with LAr
    • Tried burning of a few shorts in the barrel calorimeter in some modules
    • Results positive on Presampler, essentially no difference on Calorimeter
  • July: Decide to empty / refill by condensation  Refilling operation took 20 days
  • HV status (at an early stage of commissioning…)
    • 1600 V on Calorimeter, 2000 V on Presampler, leaving out known problematic channels:
      • Status on Calorimeter: 2 sectors HV shorts, 10 sectors working with half of the
      • signal, out of 448 independent sectors
      • Status on presampler: 7 problems, will try to burn them
      • Problematic channels: will be dealt with separately
  • Plans: Leave calorimeter off when not needed,
  • put 1600 V on 6 – 8 modules needed for cosmics running

Stable pressure in expansion vessel

Impurity level:

Measured with four purity cells:

(0.20 +- 0.05) ppm O2

Temperature stability:

Tmin = 88.2 K

Tmax = 88.6 K

Detector sub-cooled between 5.8 K and 8.6 K


End-Cap LAr and Tile Calorimeters

The end-cap calorimeters on side C were assembled in the cavern by end of January 2006, and

then the end-cap on side A followed in May 2006

Main LAr activities and plans for

the end-caps


- Since August installation of FE

electronics (no LVPS yet)

- November 2006 start cool down

- February 2007 start cold operation


- Since April installation of FE

electronics, then switched to EC-A

- February 2007 start cool down

- April 2007 start cold operation

Completed end-cap calorimeter side C,

just before insertion into the detector

calorimeter electronics
Calorimeter electronics

LAr FE crate

The installation of the LAr Front End (FE) electronics on

the detector, as well as of the Back End (BE) read-out

electronics in the control room, is proceeding to plans

(all production is very close to be finished)

A major concern are still the in-time availability, and the

reliability of the low and (to a lesser extent) the high

voltage LAr power supplies

For the Tile Calorimeter, a control problem for the low

voltage supplies has been understood, and a corrective

action is being implemented (but impact commissioning)

 Both addressed in detail with the LHCC referees

LAr barrel ROD system in USA15


Detailed commissioning work has started… some examples

Calibration pulse studies…

0.1-0.2 % amplitude

stability over one


Muons in cosmics…

First high energy

ionization signal

Noise studies…… day to day work to track coherent noise

S/B =11

No increase of coherent noise when solenoid field is on


Event display from the first LAr + Tile Calorimeter barrel cosmics run

Correlation between

LAr Middle & Front layer


Muon Spectrometer Instrumentation

The Muon Spectrometer is instrumented with precision chambers and fast trigger chambers

A crucial component to reach the required accuracy is the sophisticated alignment measurement and monitoring system

Precision chambers:

- MDTs in the barrel and end-caps

- CSCs at large rapidity for the

innermost end-cap stations

Trigger chambers:

- RPCs in the barrel

- TGCs in the end-caps

At the end of February 2006 the huge and long effort of series chamber production in many sites

was completed for all chamber types


Barrel Muon Chamber


Almost 80 % installed today

Extrapolation assumes 3.7 chambers per day.

The main problem has been access and

crane availability, more than chamber

availability or the actual installation of the

chambers on the rails

Lots of detailed small problems need to be

solved inside the detector when moving

the chambers to their final positions:

services out of envelope, poor access,

scaffolding in front of the chambers, etc.


August 2006 saw the first

combined MDT + RPC

+ Tile Calorimeter

cosmic ray muon run

RPC trigger on sector-13

assembly of end cap big wheel sectors in hall 180
Assembly of End-Cap Big Wheel sectors in Hall 180

Assembly progress in 2006:

  • Sectors for TGC-1-C: completed by April 7 (~10 days/sector in 2006)
  • Sectors for MDT-C: completed by May 23 (~12 days/sector in 2006)
  • Sectors for TGC-2-C: completed between May 1 and Aug 29 (7 days/sector over most of the assembly period)
  • Sectors for MDT-A finished within few weeks,

TGC-3-C well advanced

There are in total for both sides 6 TGC and 2 MDT

Big Wheels, requiring 72 TGC and 32 MDT sectors



dual-CPU nodes







~ 500
















Event rate

~ 200 Hz











Network switches




Event data


partial events

@ ≤ 100 kHz,

full events

@ ~ 3 kHz

ATLAS Trigger / DAQ Data Flow









Event data requests

Delete commands

Gigabit Ethernet

Requested event data


Regions Of Interest


Data of events accepted

by first-level trigger









Dedicated links
















Timing Trigger Control (TTC)

Event data pushed @ ≤ 100 kHz,

1600 fragments of ~ 1 kByte each



The level-1 system (calorimeter, muon and central trigger logics) is in the

production and installation phases for both the hardware and software

The muon trigger sub-system faces a very tight schedule for the on-chamber

components as reported before, but is proceeding satisfactorily

lvl1 calorimeter trigger
Installation in the underground counting

room is in progress

Cabling, patch panels, tests with test-pulse signals from calorimeters, etc.

Also integration with DAQ, HLT and LVL1 CTP

Full-crate tests of pre-production modules

are almost completed

Preprocessor & ROD modules are the most schedule-critical items

Most modules now in production

Pre-Processor 1/8

Analogue signalcables in USA15

Cluster Processor 1/4

Tile calorimeter test-pulse signal recorded through LVL1 Pre-processor

LVL1 calorimeter trigger
lvl1 muon trigger

Barrel Trigger Sector 13:Extrapolation of RPC cosmic-ray tracks to ground level

ATLAS shafts

TGC detectors with on-detectortrigger electronics in cavern

LVL1 muon trigger

Trigger rate ~60 Hz consistentwith simulation of cosmic rays incorresponding configuration



The High Level Trigger (HLT), Data Acquisition (DAQ) and Detector Control System (DCS)

activities have continued to proceed according to plans

Large scale system tests, involving up to 800 nodes, have further demonstrated the required

system performance and scalability

Scalability is particularly important for staging needs during the initial running of ATLAS

A major emphasis was put on all aspects of the HLT and DAQ software developments

Example of performance optimization

Components of the DCS are in fabrication or already finished (ELMB), and are already widely used, and the s/w components are available

The DCS is one of the first systems already in operation at Pit-1

installation commissioning read out system
Installation & commissioning - Read-Out System

All 153 ROSs installed and standalone


  • Each ROS PC is equipped with the final number of ROBIN cards (700 in total including spares)


44 of them connected to RODs

and fully commissioned

  • These are the full LAr-barrel, 1/2 of Tile and the CTP
  • Taking data regularly with final DAQ
    • Event building at the ROS level using the control network

Commissioning of other detector read-outs driven by RODs installation

  • Expect to complete most of it by end 2006
daq hlt pre series system
DAQ/HLT pre-series system
  • Pre-series system at Point-1 continues to be extensively used
    • For measurements, assessment and validation
  • HLT algorithms started to be used as well
    • Thanks to substantial progress in complex software integration process
    • Using physics data-sets pre-loaded in ROSs
    • Egamma, muon, tau and jet algorithms have been integrated for the first time online (release 11.0.6)
  • “24-hr” DAQ/HLT-runs regularly organised
    • Use full chain as if it was an ATLAS run
    • Force to focus on operational issues
    • Increase expertise
    • Reveal problems not seen on sub-system testing

 Extremely valuable!


Installation & commissioning - SDX1 (surface HLT/DAQ room)

A total of ~100 racks / 2500 highest-performance multi-core PCs in final system- First 50 machines of Event Builder and HLT infrastructure are being installed

- First 4 HLT racks (~120 computing nodes) follow in early 2007


LHCC milestones evolution

  • Construction issues and risks (‘Top-Watch List’)
  • A list of these issues is monitored monthly by the TMB and EB, and it is publicly visible
  • on the Web, including a description of the corrective actions undertaken:

ATLAS Installation Activities (Working Schedule)

- Beam pipe in place end of August 2007

- Restricted access to complete end-wall muon chambers and global commissioning until Nov 2007

- Ready for collisions from Nov 2007

commissioning plans overview
Commissioning plans (overview)
  • Integration of experiment
  • Global aim:ATLAS operational in summer 2007
  • First milestone: initial ATLAS core operational in fall 2006
    • Participants
      • Barrel calorimeters (with at least a minimal geometry)
      • DAQ
      • Central DCS
      • Online DataBases
      • Control room
      • Common trigger using TTC, LTP, CTP
    • Additional “ingredients”
      • Monitoring system, “combined” monitoring
      • A cosmic trigger for real particles in the detector
        • Offline analysis

ATLAS forward detectors

Being developed since the encouragements

after the LHCC LoI CERN/LHCC/2004-010:

Roman Pots: Absolute luminosity measurement

LUCID: Cherenkov light luminosity monitor

LoI to be submitted to the LHCC after the

internal review is concluded

(aim for February 2007):

Zero Degree Calorimeter (ZDC) Instrumentation of the TAN for HI physics

and beam tuning

(Working contacts with LHCf)

Future evolutions, to pass through ATLAS first, and then LHCC:

Integration of so-called ‘FP420’ (the ATLAS participants) into the ATLAS forward detector and

physics programme

Note: ATLAS forward detector and physics efforts are treated as an integral

part of ATLAS in all aspects


ATLAS organization to steer R&D for upgrades

ATLAS has put in place a structure to steer its planning for future upgrades, in particular for

R&D activities needed for possible luminosity upgrades of the LHC (‘SLHC’)

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 less attractive (but essential) aspects right from the beginning

The organization has two major coordination bodies

Upgrade Steering Group (USG)

(Existing since June 2004, with representatives from systems, software, physics,

and relevant Technical Coordination areas)

Project Office (UPO)

(New body, fully embedded within the Technical Coordination)


Areas to be addressed by Upgrade Project Office

  • overall mechanical design, drawings and layout control
  • Reviews and R&D follow-up
  • planning of services
  • electronics coordination
  • installation scenarios, scheduling
  • radiation, shielding, activation
  • interface to machine

Engineers/technicians in project office are expected to be part-time active in ATLAS operations

Define work packages to be taken up by groups outside of CERN (under project office coordination)

ATLAS SLHC R&D projects

There is a reviewing and approval procedure in place, and first proposals have been internally approved, and others are in the pipe-line

There is good communication with CMS upgrade studies to benefit from common approaches

However, there is no ambiguity, ATLAS’ priority is to

complete, commission and exploit the TDR detector !

atlas computing timeline


  • POOL/SEAL release (done)
  • ATLAS release 7 (with POOL persistency) (done)
  • LCG-1 deployment (done)
  • ATLAS complete Geant4 validation (done)
  • ATLAS release 8 (done)
  • DC2 Phase 1: simulation production (done)
  • DC2 Phase 2: intensive reconstruction (done)
  • Combined test beams (barrel wedge) (done)
  • Computing Model paper (done)
  • Computing Memorandum of Understanding (done)
  • ATLAS Computing TDR and LCG TDR (done)
  • Start of Computing System Commissioning (in progress)
  • Physics Readiness Documents (re-scheduled: early 2007)
  • Start cosmic ray run
  • GO!





ATLAS Computing Timeline

The computing and software suite has progressed on a very broad front, with a

  • particular emphasis to make it as accessible as possible to the user community
  • Examples: GRID production tools
  • Software infrastructure
  • Detector Description and graphics
  • Framework and Event Data Model
  • Simulation
  • Tracking (ID and Muons) and calorimeters (LAr and Tiles)
  • Database and data management
  • Reconstruction and Physics Analysis tools
  • Distributed analysis
  • Computing System Commissioning (CSC) along sub-system tests with
  • well-defined goals, preconditions, clients and quantifiable acceptance tests
  • Examples: Full Software Chain
    • From generators to physics analysis
  • Tier-0 Scaling
  • Calibration & Alignment
  • Trigger Chain & Monitoring
  • Distributed Data Management
  • Distributed Production (Simulation & Re-processing)
  • (Distributed) Physics Analysis
  • General ‘rehearsal’ of TDAQ/Offline data flow and analysis
  • ATLAS computing is fully embedded in, and committed to, the WLCG framework
  • Special issues have been addressed in task forces
  • Examples Luminosity block structure
  • Data Streaming Model
example 1 daily production jobs over the past couple of months
Example 1: daily production jobs over the past couple of months

Production for software validation and CSC physics samples

Some statistics June  now:

Over 50 Million events produced EGEE grid 59 %

NorduGrid 13 %

OSG 28 %

ddm operations t0 t1 s

Example 2: data flow tests over the past few months

DDM Operations: T0->T1’s

Data flow to 9 Tier-1’s

No direct data flow from T0 to Tier-2’s (ATLAS Computing Model)

NorduGrid to be integrated into Distributed Data Management (DDM) system

Total data copied so far: 1.6 PB (1 PB = 10^15 Bytes)

DDM is critical, and needs full functionality urgently







ATLAS management: SP, Deputy SP, RC, TC

Collaboration Management, experiment execution, strategy, publications, resources, upgrades, etc.


Executive Board


(Physics Coordinator)

optimization of algorithms for physics objects, physics channels

Detector Operation

(Run Coordinator)

Detector operation during data taking, online data quality, …

Data Preparation

(Data Preparation Coordinator)

Offline data quality,

first reconstruction of physics objects,

calibration, alignment

(e.g. with Zll data)


(Computing Coordinator)

Core Software, operation of offline computing, …


(Trigger Coordinator)

Trigger data quality,

performance, menu tables, new triggers, ..


Responsible for operation and calibration of their sub-detector and for sub-system specific software

Figure 2

Operation Model (Organization for LHC Exploitation)

(Details can be found at )

The DP activity is

now starting within

the context of the

Operation Model


In Release 12.0.3


Example of preparations towards the physics exploitation:

Calibration Data Challenge (CDC)

G4-simulation of

calibration samples

[O(10M) events,

e.g. Z  ll]

Geometry of




Reconstruction pass N

(Release 13, Feb. 07)




from pass N-1



pass N

Pass 1 assumes perfect


and nominal material

Condition DataBase

  • Obtain final set of corrections, alignment and calibration constants
  • Compare performance of “as-installed mis-aligned” detector after calibration and alignment to nominal (TDR) performance
  • Exercise (distributed) infrastructure: Condition DB, bookkeeping, etc.
  • A blind test: learn how to do analysis w/o a priori information
  • 24h latency test: calibration constants for 1st pass data reconstruction at Tier0

Looking further ahead: ‘The Dress Rehearsal’

A complete exercise of the full chain from trigger to (distributed) analysis, to be performed in 2007, a few months before data taking starts

Some details for experts:

  • Generate O(107) evts: few days of data taking, ~1 pb-1 at L = 1031 cm-2 s-1
  • Filter events at MC generator level to get physics spectrum expected at HLT output
  • Pass events through G4 simulation (realistic “as installed” detector geometry)
  • Mix events from various physics channels to reproduce HLT physics output
  • Run LVL1 simulation (flag mode)
  • Produce byte streams  emulate the raw data
  • Send raw data to Point 1, pass through HLT nodes (flag mode) and SFO, write out events by streams, closing files at boundary of luminosity blocks.
  • Send events from Point 1 to Tier0
  • Perform calibration & alignment at Tier0 (also outside ?)
  • Run reconstruction at Tier0 (and maybe Tier1s ?)  produce ESD, AOD, TAGs
  • Distribute ESD, AOD, TAGs to Tier1s and Tier2s
  • Perform distributed analysis (possibly at Tier2s) using TAGs
  • MCTruth propagated down to ESD only (no truth in AOD or TAGs)

Ambitious goals… need to plan it carefully (both in terms of effort needed and of

technical issues and implications)


Physics Coordination started to

address goals of the 2007 run

Interaction rate ~10kHz

s =900 GeV, L = 1029 cm-2 s-1

Jets pT > 15 GeV

(b-jets: ~1.5%)

Jets pT > 50 GeV

Jets pT > 70 GeV

 


W  e, 

Z  ee, 

30 nb-1

100 nb-1

+ 1 million minimum-bias/day

30% data taking

efficiency included

(machine plus detector)

Trigger and analysis

efficiencies included

  • Start to commission triggers and detectors with LHC collision data (minimum bias, jets, ..)
  • Maybe first physics measurements (minimum-bias, underlying event, QCD jets, …) ?
  • Observe a few W l,  , J/   ?

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-2002-114rev.):

CtC 68.2 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


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 previously

It had to be 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


Updated Cost to Completion estimates

The RRB was informed in the April 2006 meeting that the ATLAS management is re-evaluating the

financial situation and evolution since the CtC estimates accepted in October 2002

The situation is that there are new overcosts projected at the level of 4.4 MCHF for the completion,

over the 68 MCHF estimated in 2002

Further delays in installation work beyond August 2007 would require additional resources for

manpower to be paid (order 200 – 400 kCHF per month)

Some corrections to the initial CtC estimates are required in the areas of the magnet system, the

LAr cryogenics, and the infrastructure and installation activities (manpower to meet the schedule)

Largely due to the

engineering contracts

Not initially part of TCn

Workforce not

available from CERN

and Institutes


Main funding issues today

There are outstanding contributions to the baseline & Common Fund at risk 9 MCHF

Furthermore, not all the calculated 2002 CtC (CC and C&I) shares have been pledged,

in fact the situation only looks quite good because CERN has committed 5 MCHF

more than its calculated share 11 MCHF

The following table shows the details

Strategy proposed to the RRB to cover the remaining funding gap,

including the new CtC

1) Expect all outstanding baseline and Common Fund contributions according to the

Construction MoU

2) Urge all FAs to pledge their full CtC share as determined in October 2002

As CERN has committed 5 MCHF above its calculated share, this would cover the

new 4.4 MCHF additional CtC costs

3) As a fallback, extend the annual member fee for one or two years more (2007 and 2008)

The present budget request for 2007 includes this as an option, to be decided by the

RRB in its April 2007 meeting, should it become necessary

Clearly, a strong solidarity from all funding partners is needed to overcome this last

financial hurdle!


Financial Overview

Financial framework

Initial Construction MoU 1995 475 MCHF

Updated construction baseline 468.5 MCHF

Additional Cost to Completion (accepted in RRB October 2002) 68.2 MCHF

based on the Completion Plan (CERN-RRB-2002-114)

Additional CtC identified (mentioned at the last RRB, and now

announced in CERN-RRB-2006-069) 4.4 MCHF

Total costs for the initial detector 541.1 MCHF

Note that not included are:

- This assumes beam pipe closure end August 2007, later dates would imply

additional manpower costs of 200-400 kCHF per month

- No provision for future ‘force majeure’ cost overruns

- Restoration of the design-luminosity detector, estimated material costs

of parts not included in present initial detector (CERN-RRB-2002-114) 20 MCHF

- Forward detectors parts (luminosity) not funded yet 1 MCHF

Missing funding at this stage

Baseline Construction MoU, mainly Common Fund 9 MCHF

2002 Cost to Completion (CC and C&I) calculated shares 11 MCHF

Not established funding mechanism yet for the new CtC 2006 4.4 MCHF

(proposed at this RRB to be covered by the + 5 MCHF CERN CtC pledged

in 2002, or by extending ATLAS member fee by 2 more years)



The ATLAS project is proceeding within the framework of the accepted 2002 Completion Plan,

and all the resources requested in that framework are needed now to complete the initial detector

Many important milestones have been passed in the construction, pre-assembly, integration and

installation of the ATLAS detector components

The most critical construction issue is the delay in the ECT integration (as will be presented by

Marzio Nessi), which has an impact on the overall installation completion (other issues remain

the schedules for the ID and Muon end-cap chamber installations, and the calorimeter power


Very major software, computing and physics preparation activities are underway as well, using the

Worldwide LHC Computing Grid (WLCG) for distributed computing resources

Commissioning and planning for the early physics phases have started strongly

ATLAS is highly motivated, and on track, for first

collisions in 2007 and finally LHC physics in 2008

(ATLAS expects to remain at the energy frontier of HEP for the next 10 – 15 years, and the

Collaboration has already set in place a coherent organization to evaluate and plan for future

upgrades in order to exploit future LHC machine high-luminosity upgrades)

(Informal news on ATLAS is available in the ATLAS eNews letter at