7,022 Works

A facility and a web application for real-time monitoring of the TTC backbone status

M Joos, P Jurga & S Baron
The Timing Trigger and Control (TTC) system distributes timing signals from the LHC Radio Frequency (RF) source to the four experiments (ATLAS, ALICE, CMS and LHCb). A copy of these signals is also transmitted to a monitoring system, installed in the CERN Control Centre, which provides continuous measurement of selected parameters. A web application has been designed to ensure real time remote monitoring and post-mortem analysis of these data. The implemented system is aimed at...

Performance Reach in the LHC for 2012

G Arduini
Based on the 2011 experience and Machine Development study results the performance reach of the of the LHC with 25 and 50 ns beams will be addressed for operation at 3.5 and 4 TeV. The possible scrubbing scenarios and potential intensity limitations resulting from vacuum, heating will be taken into account wherever possible. The paper mainly covers the performance of the two high luminosity regions in IR1 and IR5.

LHC Beam Energy in 2012

K Dahlerup-Petersen, A Verweij, Z Charifoulline, R Denz, R Schmidt, A Siemko & E Ravaioli
The interconnections between the LHC main magnets are made of soldered joints (splices) of two superconducting cables stabilized by a copper bus bar. The measurements performed in 2009 in the whole machine, in particular in sector 3-4 during the repair after the 2008 accident, demonstrated that there is a significant fraction of defective copper bus bar joints in the machine. In this paper, the limiting factors for operating the LHC at higher energies with defective...

Review of 2011 LHC run from the experiments perspective

M Ferro-Luzzi
The 2011 LHC run is reviewed from the experiments' perspective. The LHC achievements directly related to physics production are summarized. This includes high luminosity p-p and Pb-Pb running, special activities (such as intermediate energy p-p physics, 90 m optics, luminosity calibrations) and other experiments (for example satellite-main bunch collisions in IP2, 25 ns stable beams tests, etc.).

Low energy beta-beams

Cristina Volpe
The main goal of a beta-beam facility is to determine the possible existence of CP violation in the lepton sector, the value of the third neutrino mixing angle and the mass hierarchy. Here we argue that a much broader physics case can be covered since the beta-beam concept can also be used to establish a low energy beta-beam facility. We discuss that the availability of neutrino beams in the 100 MeV energy range offers a...

Advances in Architectures and Tools for FPGAs and their Impact on the Design of Complex Systems for Particle Physics

Zaipeng Xie, Katherine Compton, William Plishker, Shuvra Bhattacharyya, Michael Schulte, Anthony Gregerson & Amin Farmahini-Farahani
The continual improvement of semiconductor technology has provided rapid advancements in device frequency and density. Designers of electronics systems for high-energy physics (HEP) have benefited from these advancements, transitioning many designs from fixed-function ASICs to more flexible FPGA-based platforms. Today’s FPGA devices provide a significantly higher amount of resources than those available during the initial Large Hadron Collider design phase. To take advantage of the capabilities of future FPGAs in the next generation of HEP...

A Zero Suppression Micro-Circuit for Binary Readout CMOS Monolithic Sensors

A Winter, C Hu-Guo, O Torheim, A Doziere & A Himmi
The EUDET-JRA1 beam telescope and the STAR vertex detector upgrade will be equipped with CMOS pixel sensors allowing to provide high density tracking adapted to intense particle beams. The EUDET sensor Mimosa26, is designed and fabricated in a CMOS-0.35μm Opto process. Its architecture is based on a matrix of 1152x576 pixels, 1152 column-level Analogue-to-Digital Conversion (ADC) by discriminators and a zero suppression circuitry. This paper focused on the data sparsification architecture, allowing a data compression...

High energy particle beams from the six metre synchrocyclotron and their utilization

V P Dmitrievski, Pontekorvo B, M S Kozodaev, V P Dzhelepov, A Y Chestnoi, M G Meshcheriakov & V S Katyshev

QPS upgrade and machine protection during LS1

R Denz
The presentation will explain all the proposed changes and discuss the impact on other shutdown activities. The upgrade of the LHC Quench Protection System QPS during LS1 with respect to radiation to electronics will concern the re-location of equipment and installation of new radiation tolerant hardware. The midterm plan for further R2E upgrades will be addressed. The protection systems for insertion region magnets and inner triplets will be equipped with a dedicated bus-bar splice supervision...

Beam-beam studies for the High-Energy LHC

K Ohmi, O Dominguez & F Zimmermann
LHC upgrades are being considered both towards higher luminosity (HL-LHC) and towards higher energy (HE-LHC). In this paper we report initial studies of the beam-beam effects in the HE-LHC [1]. The HE-LHC aims at beam energies of 16.5 TeV, where the transverse emittance decreases due to synchrotron radiation with a 2-hour damping time. As a result of this emittance, shrinkage the beam-beam parameter increases with time, during a physics store. The beam-beam limit in the...

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  • 2014

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  • CERN Publishing