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Your search keyword '"GRECO, V."' showing total 3 results
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3 results on '"GRECO, V."'

1. Elliptic flow and shear viscosity within a transport approach from RHIC to LHC energy.

Author

Plumari, S. and Greco, V.

Subjects
*FLUID dynamics, *SHEAR (Mechanics), *RELATIVISTIC Heavy Ion Collider, *LARGE Hadron Collider, *HEAVY ion collisions, *ENTROPY
Abstract

We have investigated the build up of anisotropic flows within a parton cascade approach at fixed shear viscosity to entropy density η/s to study the generation of collective flows in ultrarelativistic heavy ion collisions. We present a study of the impact of a temperature dependent η/s(T) on the generation of the elliptic flow at both RHIC and LHC. Finally we show that the transport approach, thanks to its wide validity range, is able to describe naturally the rise-fall and saturation of the ν2(pT) observed at LHC. [ABSTRACT FROM AUTHOR]

Published
2012
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2. The TOTEM modular trigger system

Author

Bagliesi, M.G., Berretti, M., Cecchi, R., Greco, V., Lami, S., Latino, G., Oliveri, E., Pedreschi, E., Scribano, A., Spinella, F., and Turini, N.

Subjects
*MODULAR design, *NUCLEAR counters, *NUCLEAR cross sections, *LUMINESCENCE, *ELASTIC scattering, *PROGRAMMABLE array logic, *LARGE Hadron Collider, *SOLENOIDS
Abstract

Abstract: The TOTEM experiment will measure the total cross-section with the luminosity independent method and study elastic and diffractive scattering at the LHC. We are developing a modular trigger system, based on programmable logic, that will select meaningful events within . The trigger algorithm is based on a tree structure in order to obtain information compression. The trigger primitive is generated directly on the readout chip, VFAT, that has a specific fast output that gives low resolution hits information. In two of the TOTEM detectors, Roman Pots and T2, a coincidence chip will perform track recognition directly on the detector readout boards, while for T1 the hits are transferred from the VFATs to the trigger hardware. Starting from more than 2000 bits delivered by the detector electronics, we extract, in a first step, six trigger patterns of 32 LVDS signals each; we build, then, on a dedicated board, a 1-bit (L1) trigger signal for the TOTEM experiment and 16 trigger bits to the CMS experiment global trigger system for future common data taking. [Copyright &y& Elsevier]

Published
2010
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3. The TOTEM GEM Telescope (T2) at the LHC

Author

Quinto, M., Berretti, M., David, E., Garcia, F., Greco, V., Heino, J., Hilden, T., Kurvinen, K., Lami, S., Latino, G., Lauhakangas, R., Oliveri, E., Ropelewski, L., Scribano, A., Turini, N., and van Stenis, M.

Subjects
*LARGE Hadron Collider, *TELESCOPES, *POSITION sensitive particle detectors, *PARTICLES (Nuclear physics), *RADIATION, *MATHEMATICAL optimization
Abstract

The TOTEM T2 telescope will measure inelastically produced charged particles in the forward region of the LHC Interaction Point 5. Each arm of the telescope consists in a set of 20 triple-GEM (Gas Electron Multiplier) detectors with tracking and trigger capabilities. The GEM technology has been considered for the design of TOTEM very forward T2 telescopes thanks to its characteristics: large active areas, good position and timing resolution, excellent rate capability and radiation hardness. Each of the four T2 half arms has been fully assembled and equipped with electronics at CERN and systematically tested in the SPS beam line H8 in 2008/09. After some optimization, the operation of the GEM chambers was fully satisfactory and the T2 telescopes were installed and commissioned in their final positions at the LHC interaction point. During the first LHC run (December 2009) the T2 telescopes have collected data, at 900 GeV and 2.36 TeV. We will present here the performances of the detector and the preliminary results obtained using the data collected. [ABSTRACT FROM AUTHOR]

Published
2011
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