1) Goal of the experiment
The goal of ATLAS is to fully exploit the enormous physics potential (Higgs boson, SUSY,
CP violation, SM violations etc..) that will be available with the construction of the Large
Hadron Collider that will provide proton-proton collisions at 14 TeV c.m. energy.
2) Physics achievements during the year 2002
None. The experiment will not start before 2007. Major achievements have been reached in
the construction of the Pixel detectors for the inner tracking detector, the Liquid Argon
electromagnetic calorimeter, Scintillator Tile hadronic calorimeter, Monitored Drift Tubes and
Resistive Plate Chambers for the muon spectrometer and Superconducting Magnets for the barrel
toroid. Major steps ahead have also been done in software development and in the use of Grid
tools in computing.
3) INFN contribution to the experiment in terms of manpower and financial support
140 f.t.e. physicists and engineers from 12 INFN Sections participate in the construction of
all the major components of the detector listed above. The financial support of INFN to the
construction of ATLAS is of 49 MCHF including cost increase with respect to original CORE
cost and corresponding to 9.5% of the total cost. Additional financial support has been given for
the construction of “deliverables” defined in the Construction MoU. In 2002 a MoU for
Maintenance and Operation costs has been signed and INFN has contributed with 260 kCHF for
this item. Travel expenses, consumables and computing are not quoted.
Funding foreseen in the 2003 budget: 5530 k€
4) Number of publications in refereed journals
24
5) Number of talks to conferences (from INFN)
~ 30
6) Number of undergraduate and doctoral thesis on the experiment
16
7) Leadership role in the experiment
L. Rossi
R. Santonico
L. Mandelli
L. Nisati
G. Susinno
S. Patricelli
D. Barberis
Member of the Executive Board and Pixel Project Leader
Member of the Executive Board and RPC Project Leader
Chairman of the LAr Calorimeter Institution Board
Chairman of the Trigger/DAQ Institution Board
Chairman of the Muon Institution Board
Member of the ATLAS Collaboration Board Advisory Committee
Computing Coordinator
8) Innovative Instruments
Very large scale superconducting magnet coils
Development of bump-bonding and flip-chip technique for large area pixel detectors
Accordion LAr calorimeters
Very large area precision measurement and trigger muon detectors
GRID technology for worldwide computing
9) Competing experiments
CMS for the full physic coverage, CDF and LHC-B for particular items.
10) International committees which have reviewed the experiment
LHCC and all others standard committees set up by CERN for large international
collaborations
11) List of milestones for INFN activities in 2003, analysis, running and constructions
The main milestones for ATLAS-INFN groups in 2003 are:
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Test of the first two Barrel Toroid coils.
Production of the Magnet system Run Down Unit.
Production of the final prototype of rad-hard electronic for the pixel detector.
Installation tools and local support for the pixel detector ready.
Insertion of the barrel electromagnetic Liquid Argon calorimeter in the Cryostat and
start of cooling.
Preliminary version of the HV control system for Liquid Argon calorimeters.
90% of the Hadronic Barrel and 100% of the Hadronic End Cap Tile calorimeter
calibrated on test beam.
Surface assembly and disassembly of Hadronic End Cap calorimeter.
70% of MDT chambers produced and 45% of chambers equipped with services.
60% of RPC Units tested and 10% mounted at CERN on MDT chambers.
Final design of the HV-LV and gas system for RPCs.
Final test and start of production of the electronic for the LV1 muon trigger.
Publication of the Technical Design Report on “High Level Trigger, DAQ e DCS”
Start of Data Challenge 2 for computing in the framework of the GRID project.
Most relevant publications with INFN contributions in 2001-2002
1) E. Acerbi, et al. “Analysis of the Discharge of the ATLAS Barrel Toroid and End Cap Toroids with Different
Configurations of the Protection Circuit”, IEEE Trans. on Appl. Supercond., 11, no.1 pp 2587-2590 (2001)
2) G. Volpini, et al. “Experimental Characterization of Resistive Joints for use inside ATLAS Toroids”, IEEE
Trans. on Appl. Supercond., 11, no.1 pp 2130-2133 (2001)
3) E. Acerbi, et al. “Construction of the ATLAS B0 model coil” IEEE Trans. on Appl. Supercond., 11, no.1 pp
1597-1600 (2001)
4) A. Foussat et al. “Mechanical Behaviour of the ATLAS B0 Model Coil”, IEEE Trans. on Appl.
Superconductivity, 12 , no. 1 pp 376-380 (March 2002)
5) P. Miele et al. “ATLAS B0 Toroid Model Coil Test at CERN”, IEEE Trans. on Appl. Superconductivity, 12 ,
no. 1 pp 411-415 (March 2002)
6) G. Baccaglioni et al. “Production and Qualification of 40 km of Al stabilized NbTi Cable for the ATLAS
Experiment at CERN”, IEEE Trans. on Appl. Superconductivity, 12 , no. 1 pp 1215-1218 (March 2002)
7) M. Aleppo et al. “A measurement of Lorentz Angle of radiation-hard Pixel Sensors” N.I.M. A465 (2001) 108111
8) C. Gemme et al. “Study of Indium bumping for the ATLAS Pixel Detector” N.I.M. A465 (2001) 200-203.
9) T. Lari. Et al.“Measurements of Spatial Resolution of ATLAS Pixel Detectors” N.I.M. A465 (2001) 112-114.
10) P. Morettini et al. “A track finding algorithm based on pixel detectors for the ATLAS second level trigger”
N.I.M. Phys. A465 (2001) 190-194.
11) P. Netchaeva et al. “Results on 0.7% X0 thick pixel modules for the Atlas detector” N.I.M. A465 (2001) 200203
12) M. Olcese et al.“Mechanics and cooling for pixel detectors” N.I.M. A465 (2001) 51-59.
13) A. Andreazza et al. “The ATLAS pixel detector” N.I.M.A461(2001)168-171.
14) G. Gagliardi “The ATLAS Pixel Detector electronics” N.I.M. A466 (2001) 275-281.
15) R. Beccherle et al. “MCC: the Module Controller Chip for the ATLAS Pixel Detector”, Nuclear Instruments
and Methods in Physics Research A 492 (2002) 117-133.
16) I. Gorelov et al. “Electrical characteristics of silicon pixel detectors”, Nuclear Instruments and Methods in
Physics Research A 489 (2002) 202-217
17) I. Gorelov et al.“A measurement of Lorentz angle and spatial resolution of radiation hard silicon pixel sensors”
Nuclear Instruments and Methods in Physics Research A 481 (2002) 204-221
18) Amaral et al.“A precise measurement of 180 GeV muon energy losses in Iron” Eur.Phys.J. C:20(2001) No.3
pag 487
19) G.Azuelos et al. “Search for Standard Model Higgs Boson using VBF at the LHC” ATLAS scientific note, to be
submitted to Nucl. Phys. B
20) A.Negri et al. “High Level Trigger in ATLAS, Design and Performance” IEEE Trans. Nucl. Sci. 49 (2002) no.2
21) G. Aielli et al. “RPC ageing studies", Nuclear Instruments and Methods in Physics Research A 478 (2002) 271276.
22) G.Aielli et al. “SF6 quenched gas mixtures for streamer mode operation of RPCs at very low voltage”, Nuclear
Instruments and Methods in Physics Research A 493 (2002) 137
23) R. Perrino et al. “Assembling facility of the ATLAS RPCs”, Proceedings of the VI Workshop on Resistive Plate
Chambers and Related Detectors, to be published on Nuclear Instruments and Methods in Physics Research A
24) G. Sehkniaidze et al. “Cosmic ray tests of RPCs for the ATLAS experiment”, Proceedings of the VI Workshop
on Resistive Plate Chambers and Related Detectors, to be published on Nuclear Instruments and Methods in
Physics Research A