Valentina Cairo
(CS)
25/05/2015, 10:00
S1 - Run II at LHC
Poster
Run-2 of the LHC will provide new challenges to track and vertex
reconstruction with higher energies, denser jets and higher rates. In
addition, the Insertable B-layer (IBL) is a fourth pixel layer, which has
been inserted at the centre of ATLAS during the shutdown of the LHC. We
will discuss improvements to track reconstruction developed during the two
year shutdown of the LHC. These...
Roberta Cardinale
(GE)
25/05/2015, 10:01
S1 - Run II at LHC
Poster
The LHCb experiment is designed to perform high-precision measurements of CP violation and search for New Physics using the enormous flux of beauty and charmed hadrons produced at the Large Hadron Collider (LHC). The two RICH detectors installed in LHCb have performed successfully during the 2010-2012 data taking period. The data from these detectors were essential to most of the physics...
Mrs
Leonor Cerda Alberich
(IFIC Valencia)
25/05/2015, 10:02
S1 - Run II at LHC
Poster
The Tile Calorimeter of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy.ย The performance of the calorimeter have been studied employing cosmic ray muons and the large sample of proton-proton collisions acquired during the run-1 of LHC (2010-2012).
Results on the calorimeter...
Dr
maximilien chefdeville
(CNRS/IN2P3/LAPP)
25/05/2015, 10:03
S1 - Run II at LHC
Poster
The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). It comprises a calorimeter system composed of four subdetectors: a Scintillating Pad Detector (SPD) and a Pre-Shower detector (PS) in front of an electromagnetic calorimeter (ECAL) which is followed by a hadron calorimeter (HCAL). They are...
Adam Davis
(LHCb, University of Cincinnati)
25/05/2015, 10:04
S1 - Run II at LHC
Poster
The LHCb tracking system consists of a Vertex Locator around the interaction point, a tracking station with four layers of silicon strip detectors in front of the magnet, and three tracking stations, using either straw-tubes or silicon strip detectors, behind the magnet. This system allows to reconstruct charged particles with a high efficiency (typically > 95% for particles with momentum > 5...
Dr
Daniel Dobos
(CERN)
25/05/2015, 10:05
S1 - Run II at LHC
Poster
The Pixel Detector of the ATLAS experiment has shown excellent performance during the whole Run-1 of LHC. Taking advantage of the long showdown, the detector was extracted from the experiment and brought to surface, to equip it with new service quarter panels, to repair modules and to ease installation of the Insertable B-Layer (IBL), a fourth layer of pixel detectors, installed in May 2014...
Dr
Claudio Ferretti
(University of Michigan)
25/05/2015, 10:06
S1 - Run II at LHC
Poster
The ATLAS muon reconstruction performance during the LHC
run I at $\sqrt(s)= 7$ and 8 TeV was recently measured
using samples of $J/\psi \rightarrow \mu\mu$,
$Z \rightarrow \mu\mu$ and
$\Upsilon \rightarrow \mu\mu$ decays. Reconstruction efficiency,
transverse momentum resolution and momentum scales are measured
in the various regions of the detector
and for muon momenta between...
Dr
Albert Puig
(EPFL)
25/05/2015, 10:07
S1 - Run II at LHC
Poster
The LHCb experiment will record an unprecedented dataset of beauty and charm hadron decays during Run II of the LHC, set to take place between 2015 and 2018. A key computing challenge is to store and process this data, which limits the maximum output rate of the LHCb trigger. So far, LHCb has written out a few kHz of events containing the full raw sub-detector data, which are passed through a...
Ms
Mari Hoffmann
(CEA Saclay)
25/05/2015, 10:08
S1 - Run II at LHC
Poster
The Minimum Bias Trigger Scintillators (MBTS) delivered the primary trigger for selecting events from low luminosity proton-proton, lead-lead and lead-proton collisions with the smallest possible bias during LHC Run 1 (2009-2013). Similarly, the MBTS will select events for the first Run 2 physics measurements, for instance charge multiplicity, proton-proton cross section, rapidity gap...
Mr
Martin Lipinski
(RWTH Aachen University, 1. Physikalisches Institut B)
25/05/2015, 10:09
S1 - Run II at LHC
Poster
The silicon pixel detector is the innermost component of the CMS tracking system, providing high precision space point measurements of charged particle trajectories. Before 2018 the instantaneous luminosity of the LHC is expected to reach about 2x10E34cmโ2sโ1, which will significantly increase the number of interactions per bunch crossing. To maintain a high tracking efficiency, CMS has...
Mr
Antonio Miucci
(University of Geneva)
25/05/2015, 10:10
S1 - Run II at LHC
Poster
The ATLAS experiment is ready to face the Run-2 with improved tracking performance thanks to the installation of a new Pixel layer, also called Insertable B-Layer (IBL).
The IBL has been installed in May 2014 being placed at only 3.3 cm radius from the beam axis.
The combination of the limited distance from the interaction point and the increase of Luminosity that LHC will face in Run-2...
Ms
Styliani Orfanelli
(CERN, NTUA)
25/05/2015, 10:11
S1 - Run II at LHC
Poster
A new detector to measure the machine induced background at larger radii
has been developed and installed in the CMS experiment at LHC. It
consists of 40 modules, each comprising a quartz bar read out by a
photo-multiplier. Since Cerenkov radiation is emitted in a forward cone
around the charged particle trajectory, these detectors can distinguish
the directions of the machine induced...
Ms
Styliani Orfanelli
(CERN, NTUA)
25/05/2015, 10:12
S1 - Run II at LHC
Poster
FLUKA and MARS radiation transport codes are used by the Beam Radiation Instrumentation and Luminosity project (BRIL) of CMS to simulate the radiation levels due to proton-proton collisions. Results are used by the CMS collaboration for various applications: Comparison with detector hit rates, pile-up studies, predictions of radiation damage based on various models (Dose, NIEL, DPA),...
Mr
Michael Rammensee
(CERN)
25/05/2015, 10:13
S1 - Run II at LHC
Poster
After its first shutdown, LHC will provide pp collisions with increased luminosity and energy. In the ATLAS experiment, the Trigger and Data Acquisition (TDAQ) system has been upgraded to deal with the increased event rates. The updated system is radically different from the previous implementation, both in terms of architecture and expected performance. The main architecture has been reshaped...
Fabian Spettel
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D))
25/05/2015, 10:14
S1 - Run II at LHC
Poster
The ATLAS detector was designed and built to study proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and at instantaneous luminosities up to $10^{34}~\mathrm{cm^{-2}s^{-1}}$. Liquid argon (LAr) sampling calorimeters are employed for all electromagnetic calorimetry in the pseudorapidity region $|\eta|<3.2$, and for hadronic calorimetry in the region from...
Ms
Maria Elena Stramaglia
(AEC-LHEP Bern University)
25/05/2015, 10:15
S1 - Run II at LHC
Poster
The calibration of the Pixel detector fullfills two main purposes: to
tune front-end registers for establishing the best operational settings
and to measure the tuning performance through a subset of scans.
An analysis framework has been set up in order to take actions on the
detector given the outcome of a calibration scan (e.g. to create a mask
for disabling noisy pixels).
The software...
Ms
Stefania Stucci
(Bern University)
25/05/2015, 10:16
S1 - Run II at LHC
Poster
Optical links are necessary to satisfy the high speed readout over long distances for advanced silicon detector systems. We report on the optical readout used in the newly installed central pixel layer (IBL) in the ATLAS experiment. The off detector readout employs commercial optical to analog converters, which were extensively tested for this application. Performance measurements during...
Prof.
Tomasz Szumlak
(AGH - University of Science and Technology)
25/05/2015, 10:17
S1 - Run II at LHC
Poster
The upgrade of the LHCb experiment will run at an instantaneous luminosity of 2x10^33 cm^-2 s^-1 with a fully software based trigger, allowing to read out the detector at a rate of 40MHz. For this purpose, the full tracking system will be newly developed: the vertex locator (VELO) will be replaced by a pixel-based detector, withstanding the high radiation dose and providing an excellent track...
Prof.
Tomasz Szumlak
(AGH - University of Science and Technology)
25/05/2015, 10:18
S1 - Run II at LHC
Poster
LHCb is a dedicated experiment to study New Physics in the decays of heavy hadrons at the Large Hadron Collider (LHC) at CERN. Heavy hadrons are identified through their flight distance in the Vertex Locator (VELO).
The VELO comprises 42 modules made of two n+-on-n 300 um thick half-disc silicon sensors with R-measuring and Phi-measuring micro-strips. In order to allow retracting the...
Dr
Mark Tobin
(LPHE-EPFL)
25/05/2015, 10:19
S1 - Run II at LHC
Poster
LHCb has introduced a novel real-time detector alignment and calibration strategy for LHC Run 2. Data collected at the start of the fill will be processed in a few minutes and used to update the alignment, while the calibration constants will be evaluated for each run. This procedure will improve the quality of the online alignment. For example, the vertex locator is retracted and reinserted...
Dr
Mark Tobin
(LPHE-EPFL)
25/05/2015, 10:20
S1 - Run II at LHC
Poster
The LHCb experiment is a single arm spectrometer, designed to
study CP violation in B-decays at the LHC. It is crucial to
accurately and efficiently detect the charged decay particles,
in the high-density particle environment of the LHC. For this,
the Outer Tracker (OT) was constructed, consisting of 54,000
straw tubes, covering in total an area of 360 m2 of double
layers. The detector...
Clara Troncon
(MI), Ms
Maria Elena Stramaglia
(AEC-LHEP Bern University)
25/05/2015, 10:21
S1 - Run II at LHC
Poster
In 2014, the Pixel Detector of the ATLAS experiment was extended by about 12 million pixels with the installation of the Insertable B-Layer (IBL). Data-taking and tuning procedures have been implemented by employing newly designed read-out hardware, which supports the full detector bandwidth even for calibration. The hardware is supported by an embedded software stack running on the read-out...
Mr
Marius Cornelis Van Woerden
(CERN)
25/05/2015, 10:22
S1 - Run II at LHC
Poster
We present in this contribution the new system for laser calibration of the ATLAS hadronic calorimeter TileCal. The laser system is a part of the three stage calibration apparatus designed to compute the calibration constants of the individual cells of TileCal. The laser system is mainly used to correct for short term (one month) drifts of the readout of the individual cells. A sub-percent...
Lorenzo Viliani
(FI)
25/05/2015, 10:23
S1 - Run II at LHC
Poster
We review the CMS Tracker performance during LHC Run I. We will then present the latest results of both pixel and strip detectors following the first LHC long shutdown (LS1). Results from detector calibration and commissioning, together with a description of operations and repairs done during LS1 will be shown.
Mr
Tibor Zenis
(CU Bratislava)
25/05/2015, 10:24
S1 - Run II at LHC
Poster
The Tile Calorimeter is the hadronic calorimeter covering the central region of the ATLAS detector at the LHC. It consists of thin steel plates and scintillating tiles. Wavelength shifting fibres coupled to the tiles collect the produced light and are read out by photomultiplier tubes.
The calibration scheme of the Tile Calorimeter comprises Cs radioactive source, laser and charge injection...
