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First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. Display of a candidate collision event showing tracks in the Inner Detector. Photo #: atlas2009-collision-atlantis-140541-171897-new |
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First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. 3D display of the previous candidate collision event. Photo #: atlas2009-collision-vp1-140541-171897-new |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Event display of a muon candidate, measured in the ATLAS muon spectrometer. Note that the toroidal magnetic field, bending the muon tracks in the z projection, is turned off for this run so that the muons follow a straight line path. Photo #: atlas2009-collision-vp1-141749-171059-muon-web |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Display of event showing the electromagnetic and hadronic calorimeters. Only hits on tracks are displayed here. Photo #: atlas2009-collision-atlantis-141749-406601-web |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Display of a collision event showing tracks in the Inner Detector system. Photo #: atlas2009-collision-atlantis-141749-405315-hits-web |
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First 2.36 TeV Collision Events recorded, December 8th, 2009
On Tuesday evening, December 8th, 2009, the LHC achieved for the first time 2.36 TeV collisions and ATLAS recorded their first events at this record energy. Display of a 2-jet event recorded at 2.36 TeV. The jets have ET of 23.2 GeV and 16.2 GeV, their eta is 2.06 and 1.43, respectively. Photo #: JiveXML_142065_116969-RZ-LegoPlot-YX-2009-12-08-22-52-41-web |
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First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. 3D display of the same candidate collision event, showing the measured energies in the calorimeter. Photo #: atlas2009-collision-vp1-140541-171897-new-lego |
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First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. Display of a another candidate collision event showing tracks in the Inner Detector. Photo #: atlas2009-atlantis-140541-184417-web |
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First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. 3D display of a candidate 2 jet event. Photo #: atlas2009-vp1-140541-416712-2jet-web |
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First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. Display of the same candidate 2 jet event, showing the measured energies in the calorimeter. Photo #: atlas2009-atlantis-140541-416712-2jet-web |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Another display of the same 2 jet event showing different projections. Photo #: JiveXML_141994_566308-RZ-LegoPlot-YX-2009-12-09-15-00-30-web |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. A display of a 2 jet event take a few days later with uncalibrated transverse energies of 54 GeV and 55 GeV, and pseudo-rapidities of -0.2 and -0.2, respectively. Photo #: atlas2009-collision-vp1-141994-566308-2jet-web |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. A display of an event with 2 reconstructed muons in the forward region. Photo #: atlas2009-collision-vp1-141749-133538-2muons-web |
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First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. A display of a reconstructed secondary vertex from a Ks candidate decaying into 2 pions. Photo #: atlas2009-collision-atlantis-141749-460665-kshort-cand-web |
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First 2.36 TeV Collision Events recorded, December 14th, 2009
On Tuesday evening, December 8th, 2009, the LHC achieved for the first time 2.36 TeV collisions and ATLAS recorded their first events at this record energy. More events at this energy were taken on December 14th in the early morning. Display of an event with jets, taken on December 14th at 2.36 TeV. Photo #: atlas2009-collision-atlantis-142308-482137-web |
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First 2.36 TeV Collision Events recorded, December 8th, 2009
On Tuesday evening, December 8th, 2009, the LHC achieved for the first time 2.36 TeV collisions and ATLAS recorded their first events at this record energy. More events at this energy were taken on December 14th in the early morning. A view of an event taken on December 14th. Photo #: atlas2009-collision-vp1-142308-482137-web |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a jet event at 7 TeV recorded by ATLAS.
Photo #: JiveXML_152166_347262 |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a 7 TeV event... with to two inelastic proton-proton collisions (pile up).
Photo #: JiveXML_152166_467774-Pileup-improved |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Event display of a 7 TeV proton collision recorded by ATLAS.
Photo #: JiveXML_152166_316199-link |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a 2 jet event at 7 TeV.
Photo #: atlas2010-vp1-152166-399473 |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Another display of an event at 7 TeV with a muon candidate.
Photo #: atlas2010-vp1-152166-639756 |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Display of an event at 7 TeV with Pixel detector fully on.
Photo #: JiveXML_152166_451982 |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Display of an event at 7 TeV with a muon candidate.
Photo #: atlas2010-vp1-152166-322215 |
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On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a 7 TeV proton collision event.
Photo #: atlas2010-vp1-152166-316199 |
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First candidate event for W boson to electron + neutrino seen in 7 TeV collision data.
Photo #: Atlantis-Wenu-lego-rz |
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First W boson candidate event recorded by ATLAS in 2010.
Photo #: VP1-W-mune |
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W boson candidate event recorded by ATLAS in 2010.
Photo #: VP1-W-munu-2 |
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W boson candidate event recorded by ATLAS in 2010.
Photo #: Atlantis-Wenu-lego-rz-2 |
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First candidate for an event with a Z boson decaying to two muons seen in 7 TeV collision data. 2010.
Photo #: atlas2010_vp1_run154822_evt14321500 |
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First candidate for an event with a Z boson decaying to two electrons seen in 7 TeV collision data. 2010.
Photo #: Atlantis_154817_968871-3d |
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A Multi-Jet Event from a 7 TeV Collision
Photo #: JiveXML_158548_2486978 |
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Early heavy ion events in first heavy-ion fill with stable beam collisions seen in the ATLAS Experiment, 8 November 2010.
Photo #: 1011255_01 |
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Early heavy ion events in first heavy-ion fill with stable beam collisions seen in the ATLAS Experiment, 8 November 2010.
Photo #: 1011255_02 |
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Candidate event with a Z decay to muon pairs, recoiling against missing-ET. The muon candidates have transverse momenta of 50 and 126 GeV and a dimuon invariant mass of 94 GeV; the missing ET is measured to be 161 GeV.
Photo #: atlas2010_ZmumuMet-candidate_run167776_evt129360643 |
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An event with asymmetric jets.
Photo #: run169136_evt1395684_v5 |
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An event with asymmetric jets.
Photo #: run169045_evt1914004_v5 |
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An event with asymmetric jets.
Photo #: run169045_evt1914004_v5 |
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A highly asymmetric dijet event, with one jet with ET > 100 GeV and no evident recoiling jet, and with high energy calorimeter cell deposits distributed over a wide azimuthal region.
Only tracks with pT > 2.6 GeV are shown, and only calorimeter energy deposits with cell energy ET > 700 MeV in the electromagnetic calorimeter, and E > 1 GeV in the
hadronic calorimeter.
Photo #: HI-asyjet-paper |