Andrew York
(Unknown)
28/07/2009, 14:00
First Results from LHC
The Compact Muon Solenoid (CMS) is one of two general purpose experiments at
the Large Hadron Collider. The CMS experiment prides itself on an ambitious,
all silicon based, tracking system. After almost 20 years of design and
construction the CMS tracker detector has been installed and commissioned.
The tracker detector consists of ten layers of silicon microstrip detectors
while...
Dr
Galyaev Evgeny
(University of Texas at Dallas)
28/07/2009, 14:25
First Results from LHC
The ATLAS Pixel Detector is the innermost detector of the ATLAS experiment at the Large Hadron Collider at CERN. Approximately 80M electronic channels of the detector, made of silicon, allow detecting particle tracks and secondary vertices with very high precision.
After connection of all of the cooling components and services, and verification of their operation the ATLAS Pixel Detector...
Zijin Guo
(Johns Hopkins University-Unknown-Unknown)
28/07/2009, 14:50
First Results from LHC
We present the first results of the full CMS Silicon Tracker alignment based
on several million reconstructed tracks from the cosmic data taken during
the commissioning runs with the detector in its final position. Implication
for CMS physics performance is discussed. The all-silicon design of the
tracking system of the CMS experiment is expected to provide 1-2% resolution
for 100...
Grant Gorfine
(Bergische Universitaet Wuppertal)
28/07/2009, 15:15
First Results from LHC
Alignment of the ATLAS Inner Detector tracking system
The Large Hadron Collider (LHC) at CERN is the world's largest particle accelerator. It will collide two
proton beams at an unprecedented centre of mass energy of 14 TeV. ATLAS is equipped with a
charged-particle tracking system built on two technologies: silicon and drift-tube based detectors,
constituting the ATLAS Inner...
Ashfaq Ahmad
(Stony Brook University)
28/07/2009, 15:40
First Results from LHC
For particle and jet energies above a few GeV, calorimeters provide the most precise measurements. Thus, calibration of the calorimeters is crucial to achieve those physics goals that are dependent on the energy resolution and scale. For the ATLAS EM calorimeter, the strategy is to obtain a global constant term that is less than 0.7\%. Information from test beams and the hardware calibration...
Mr
Phillip Killewald
(The Ohio State University)
28/07/2009, 16:30
First Results from LHC
The CMS detector is a general-purpose particle detector centered on one of the interaction points at the LHC. On the endcaps of the detector, interspersed between iron disks that serve as a return yoke for the detector's solenoidal magnetic field, are mounted 468 cathode strip chambers (CSCs). These chambers will serve as a trigger and spectrometer for muons generated in high-energy...
Dr
Jim Pivarski
(Texas A&M University)
28/07/2009, 16:55
First Results from LHC
As its name suggests, the Compact Muon Solenoid (CMS) features a full tracking spectrometer for identifying and measuring the momenta of muons. Every muon passes through 18-44 layers, providing a highly redundant track capable of validating and improving the momentum measurement from the inner tracker. But like any tracking system, its performance depends on precise knowledge of the positions...
Dr
Edward Diehl
(University of Michigan)
28/07/2009, 17:20
First Results from LHC
The ATLAS muon spectrometer consists of several major components: Monitored Drift Tubes (MDTs) for precision measurements in the bending plane of the muons, supplemented by Cathode Strip Chambers (CSC) in the high $\eta$ region; Resistive Plate Chambers (RPCs) and Thin Gap Chambers (TGCs) for trigger and second coordinate measurement in the barrel and endcap regions, respectively; an optical...
Chang Liu
(Purdue University)
28/07/2009, 17:45
First Results from LHC
Despite of the delay of physics collisions at the Large Hadron Collider
(LHC), induced by the incidence in September 2008, the CMS collaboration is
utilizing the commissioned detector to take large amounts of cosmic data.
About 300 million cosmic events were recorded with the full detector and a
magnetic field of 3.8~T turned on. The effort has provided significant
statistics to...