CERN Accelerating science

CERN Published Articles

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2014-04-22
14:36
An OpenMP Parallelisation of Real-time Processing of CERN LHC Beam Position Monitor Data / Renshall, H (CERN) ; Deniau, L (CERN)
SUSSIX is a FORTRAN program for the post processing of turn-by-turn Beam Position Monitor (BPM) data, which computes the frequency, amplitude, and phase of tunes and resonant lines to a high degree of precision. For analysis of LHC BPM data a specific version run through a C steering code has been implemented in the CERN Control Centre to run on a server under the Linux operating system but became a real time computational bottleneck preventing truly online study of the BPM data. [...]
2012 Published version from JACoW: PDF;
In : 11th International Computational Accelerator Physics Conference, Rostock-Warnemünde, Germany, 19 - 24 Aug 2012, pp.THP06

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2014-04-22
14:30
Simulation of Multibunch Instabilities with the HEADTAIL Code / Mounet, N (Ecole Polytechnique, Lausanne ; CERN) ; Metral, E (CERN) ; Rumolo, G (CERN)
Multibunch instabilities due to beam-coupling impedance can be a critical limitation for synchrotrons operating with many bunches. To study these instabilities, the HEADTAIL code has been extended to simulate the motion of many bunches under the action of wake fields. [...]
2012 Published version from JACoW: PDF;
In : 11th International Computational Accelerator Physics Conference, Rostock-Warnemünde, Germany, 19 - 24 Aug 2012, pp.THSDI2

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2014-04-22
13:44
Automatic Computer Algorithms for Beam-based Setup of the LHC Collimators / Valentino, G (CERN ; Malta U.) ; (CERN ; U. Malta) ; Assmann, R W (CERN) ; Bruce, R (CERN) ; Redaelli, S (CERN) ; Salvachua, B (CERN) ; Wollmann, D (CERN)
Beam-based setup of the LHC collimators is necessary to establish the beam centers and beam sizes at the collimator locations and determine the operational settings during various stages of the LHC machine cycle..
2012 Fulltext: PDF;
In : 11th International Computational Accelerator Physics Conference, Rostock-Warnemünde, Germany, 19 - 24 Aug 2012, pp.MOSBI1

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2014-04-09
08:45
AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements / Mariazzi, Sebastiano (Stefan Meyer Inst. Subatomare Phys.) ; Aghion, Stefano (INFN, Milan ; Milan Polytechnic) ; Amsler, Claude (Bern U., LHEP) ; Ariga, Akitaka (Bern U., LHEP) ; Ariga, Tomoko (Bern U., LHEP) ; Belov, Alexandre S (Moscow, INR) ; Bonomi, Germano (INFN, Pavia ; INFM, Brescia) ; Bräunig, Philippe (Kirchhoff Inst. Phys.) ; Brusa, Roberto S (Trento U. ; INFN, Trento) ; Bremer, Johan (CERN) et al.
AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is an experiment that aims to perform the first direct measurement of the gravitational acceleration g of antihydrogen in the Earth’s field. A cold antihydrogen beam will be produced by charge exchange reaction between cold antiprotons and positronium excited in Rydberg states. [...]
2014 - 6 p. - Published in : Eur. Phys. J. D 68 (2014) 41

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2014-04-08
10:08
Design and Performance of a Liquid Scintillator/Iron Sandwich Calorimeter used at the ISR / Hilscher, H (CERN ; Harvard U. ; Munich U.) ; Willis, W J (Harvard U. ; Munich U.) ; Baum, L (Harvard U. ; Munich U.) ; Lobkowicz, F (Harvard U. ; Munich U.) ; Rubbia, C (Harvard U. ; Munich U.) ; Staude, A (Harvard U. ; Munich U.)
1975 Fulltext: PDF;
In : Calorimeter Workshop, Fermilab, Batavia, IL, USA, 9 - 10 May 1975, pp.295-323

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2014-04-08
09:38
Physics Limitations on Calorimetry / Fabjan, C W (CERN) ; Willis, W J (CERN)
1975 Fulltext: PDF;
In : Calorimeter Workshop, Fermilab, Batavia, IL, USA, 9 - 10 May 1975, pp.1-11

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2014-04-04
13:34
Forward tracking at the next e+e- collider part II: experimental challenges and detector design / Aplin,S (DESY) ; Boronat,M (Valencia U., IFIC) ; Dannheim,D (CERN) ; Duarte,J (Cantabria Inst. of Phys.) ; Gaede,F (DESY) ; Ruiz-Jimeno,A (Cantabria Inst. of Phys.) ; Sailer,A (CERN) ; Valentan,M (Vienna, OAW) ; Vila,I (Cantabria Inst. of Phys.) ; Vos,M (Valencia U., IFIC)
We present the second in a series of studies into the forward tracking system for a future linear e+e􀀀 collider with a center-of-mass energy in the range from 250 GeV to 3 TeV. In this note a number of specic challenges are investigated, that have caused a degradation of the tracking and vertexing performance in the forward region in previous experiments. [...]
AIDA-PUB-2013-014.- Geneva : CERN, 2013 - Published in : JINST: 8 (2013) Fulltext: PDF;

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2014-04-04
10:05
An Application for Research: the Large Hadron Collider / Bailey, R (CERN)
The Large Hadron Collider (LHC) machine at CERN was designed and built primarily to find or exclude the existence of the Higgs boson, for which a large amount of data is needed by the LHC experiments. This requires operation at high luminosity, which in turn requires running with thousands of high-intensity proton bunches in the machine. [...]
arXiv:1404.0966.- Geneva : CERN, 2013 - 10 p. - Published in : CERN Yellow Report CERN-2013-007, pp.565-574 Published version from CERN: PDF; External link: Preprint
In : CAS - CERN Accelerator School, Ion Sources, Senec, Slovakia, 29 May - 8 Jun 2012, pp.565-574

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2014-04-04
10:05
Vacuum Technology for Ion Sources / Chiggiato, P (CERN)
The basic notions of vacuum technology for ion sources are presented, with emphasis on pressure profile calculation and choice of pumping technique. A Monte Carlo code (Molflow+) for the evaluation of conductances and the vacuum-electrical analogy for the calculation of time-dependent pressure variations are introduced. [...]
arXiv:1404.0960.- Geneva : CERN, 2013 - 40 p. - Published in : CERN Yellow Report CERN-2013-007, pp.463-502 Published version from CERN: PDF; External link: Preprint
In : CAS - CERN Accelerator School, Ion Sources, Senec, Slovakia, 29 May - 8 Jun 2012, pp.463-502

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2014-04-04
10:05
Charge Breeding of Radioactive Ions / Wenander, F J C (CERN)
Charge breeding is a technique to increase the charge state of ions, in many cases radioactive ions. The singly charged radioactive ions, produced in an isotope separator on-line facility, and extracted with a low kinetic energy of some tens of keV, are injected into a charge breeder, where the charge state is increased to Q. [...]
arXiv:1404.0945.- Geneva : CERN, 2013 - 30 p. - Published in : CERN Yellow Report CERN-2013-007, pp.351-380 Published version from CERN: PDF; External link: Preprint
In : CAS - CERN Accelerator School, Ion Sources, Senec, Slovakia, 29 May - 8 Jun 2012, pp.351-380

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