# Posters

უკანასკნელი დამატებები:
2015-02-12
13:19
Indico
 Reference: Poster-2015-466 Created: 2012. -1 p Creator(s): Ferreira, Pedro Indico was born as a European project. In 2004, CERN became the sole owner of the project and decided to further extend its capabilities, enabling CERN users to manage lectures and meetings as well. This allowed Indico to replace the 'CERN Agenda' application. In 2007, a Room Booking module was added, thus allowing CERN users to book their rooms on-line. Indico became, in 2009, CERN's hub for collaborative tools, empowering collaborations such as the LHC and its experiments with video conferencing and chatting capabilities. Since then, several other features have been developed, such as a full-fledged paper reviewing module for conferences and a powerful HTTP API. © CERN Geneva Access to files

2015-02-11
16:02
The keys to CERN conference rooms - Managing local collaboration facilities in large organisations
 Reference: Poster-2015-465 Created: 2013. -1 p Creator(s): Baron, T; Domaracky, M; Duran, G; Correia Fernandes, J; Ferreira, P [...] For a long time HEP has been ahead of the curve in its usage of remote collaboration tools, like videoconference and webcast, while the local CERN collaboration facilities were somewhat behind the expected quality standards for various reasons. This time is now over with the creation by the CERN IT department in 2012 of an integrated conference room service which provides guidance and installation services for new rooms (either equipped for video-conference or not), as well as maintenance and local support. Managing now nearly half of the 250 meeting rooms available on the CERN sites, this service has been built to cope with the management of all CERN rooms with limited human resources. This has been made possible by the intensive use of professional software to manage and monitor all the room equipment, maintenance and activity. This paper will focus on presenting these packages, either off-the-shelf commercial products (asset and maintenance management tool, remote audiovisual equipment monitoring systems, local automation devices, new generation touch screen interfaces for interacting with the room) when available or locally developed integration and operational layers (generic audiovisual control and monitoring framework) and how they help overcoming the challenges presented by such a service. The aim is to minimise local human interventions while preserving the highest service quality and placing the end user back to the center of this collaboration platform. © CERN Geneva Access to files

2015-01-28
17:01
Multimedia and Document Services
 Reference: Poster-2015-464 Keywords:  CERN Document Server  CDS  Invenio  Digital Library  Multimedia  Institutional Repository Created: 2013. -1 p Creator(s): Marian, Ludmila; Caffaro, Jérôme; Le Meur, Jean-Yves Enabling access to articles, reports and multimedia content produced by CERN, using the Invenio digital library and repository software. © CERN Geneva Access to files

2015-01-05
15:32
Benchmarking Microwave Cavity Dark Matter Searches using a Radioactive Source
 Reference: Poster-2015-463 Created: 2014. -1 p Creator(s): Caspers, F; Betz, M A radioactive source is proposed as a calibration device to verify the sensitivity of a microwave dark matter search experiment. The interaction of e.g., electrons travelling in an arbitrary direction and velocity through an electromagnetically “empty” microwave cavity can be calculated numerically. We give an estimation of the energy deposited by a charged particle into a particular mode. Numerical examples are given for beta emitters and two particular cases: interaction with a field free cavity and interaction with a cavity which already contains an electromagnetic field. Each particle delivers a certain amount of energy related to the modal R/Q value of the cavity. The transferred energy is a function of the particles trajectory and its velocity. It results in a resonant response of the cavity, which can be observed using a sensitive microwave receiver, provided that the deposited energy is significantly above the single photon threshold. © CERN Geneva Access to files

2014-11-27
09:35
LHCb : A generic firmware core to drive the Front-End GBT-SCAs for the LHCb ugprade
 Reference: Poster-2014-462 Keywords:  LHCb  LHC  Upgrade  trigger-less electronics  GBT  GBT-SCA  TFC  ECS Created: 2014. -1 p Creator(s): Alessio, Federico; Caplan, Cairo; Gaspar, Clara; Jacobsson, Richard; Wyllie, Ken The LHCb experiment has proposed an upgrade towards a full 40 MHz readout system in order to run between five and ten times its initial design luminosity. The entire Front-End electronics will be upgraded in order to cope with higher sub-detector occupancy, higher data rate and to work in a complete trigger-less fashion. In this paper, we describe a novel way to transmit slow control information to the Front-End electronics, by profiting from bidirectional optical connections and the GBT and GBT-SCA chipset capabilities. The implementation and preliminary validation tests are shown as well Related links:LHCb conference © CERN Geneva Access to files

2014-11-27
09:25
LHCb : Clock and timing distribution in the LHCb upgraded detector and readout system
 Reference: Poster-2014-461 Keywords:  LHCb  LHC  Upgrade  trigger-less electronics  TFC  clock  timing Created: 2014. -1 p Creator(s): Alessio, Federico; Baron, S; Barros Marin, M; Cachemiche, JP; Hachon, F [...] The LHCb experiment is upgrading part of its detector and the entire readout system towards a full 40 MHz readout system in order to run between five and ten times its initial design luminosity and increase its trigger efficiency. In this paper, the new timing, trigger and control distribution system for such an upgrade is reviewed with particular attention given to the distribution of the clock and timing information across the entire readout system, up to the FE and the on-detector electronics. Current ideas are here presented in terms of reliability, jitter, complexity and implementation. Related links:Conference poster © CERN Geneva Access to files

2014-11-26
15:11
ALICE Detector Control System
 Reference: Poster-2014-460 Keywords:  ALICE  Detector Control System  LHC Created: 2014. -1 p Creator(s): Chochula, P The Detector Control System (DCS) is responsible for SAFE and STABLE operation of the ALICE experiment. The DCS interacts with ALICE Online and Offline systems as well as with external services. © CERN Geneva Access to files

2014-11-24
14:02
LHCb : A Scintillating Fibre Trackind Detector for the LHCb Upgrade
 Reference: Poster-2014-459 Keywords:  LHCb Created: 2014. -1 p Creator(s): Lindner, Rolf LHCb is preparing the upgrade which is scheduled to be installed in 2018/19. The Scintillating Fibre (SciFi) Tracker will be designed to replace the current tracking system downstream of the magnet, required to run at an increased luminosity of 1 - 2 10$^{33}$ cm$^{-2}$s$^{-1}$ and to collect a total of 50fb$^{-1}$ of data. The readout of the detector will be at 40MHz, applying a full software based trigger for every single bunch crossing. The SciFi Tracker consists of 12 planes covering a total surface of 350 m2. Modules are based on 2.5 m long multilayer ribbons made of 250 um diameter scintillating fibres as the active medium and signal transport. Silicon photomultiplier (SiPM) arrays with 128 channels at a width of 250 um are used for the readout. The signals from the SiPMS are digitized on an ASIC chip before reconstructing the track hit position within an FPGA on the front-end board. Several challenges facing this detector and the significant progress over the last year will be presented regarding the precision construction of the large active detector components, the radiation hardness of the scintillating fibers and the SiPMs, the high density readout electronics, and the necessary cooling system Related links:IEEE 2014 Conference © CERN Geneva Access to files

2014-11-21
15:40
First evidence for the rare decay $B^0_S\rightarrow\mu^+\mu^-$
 Reference: Poster-2014-458 Created: 2014. -1 p Creator(s): Tolk, Siim; Blake, Thomas LHCb observed evidence for a very rare decay of a neutral $B_S$ meson into a pair of muons[1]. The probability that the background could produce such an excess or larger is mere 5.3 x $10^{-4}$. This corresponds to signal significance of 3.5 standard deviations in the combined 1.0fb$^{-1}$ of 2011 (√s=7TeV) and 1.11f$^{-1}$ of 2012 (√s=8TeV) data. Related links:Conference LHCP 2014 © CERN Geneva Access to files

2014-11-21
15:24
LHCb Observation of photon polarization in the $b\rightarrow s\gamma$ transition
 Reference: Poster-2014-457 Created: 2014. -1 p Creator(s): Veneziano, Giovanni; Blake, Thomas The Standard Model (SM) predicts that the photon emitted in $b\rightarrow s\gamma$ transitions is predominantly left-handed. While the measured inclusive $b\rightarrow s\gamma$ rate agrees with the SM calculations, no direct evidence exists for a nonzero photon polarization $\lambda_\gamma$ in this type of decays. Several extensions of the SM, compatible with all current measurements, predict that the photon acquires a significant right-handed component. Related links:Conference LHCP 2014 © CERN Geneva Access to file

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