CERN Accelerating science

SPS and CNGS

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2019-02-21
06:43
The SE-CpFM Detector for the Crystal-Assisted Extraction at CERN-SPS / Addesa, Francesca (INFN, Rome) ; Burmistrov, Leonid (Orsay, LAL) ; Cavoto, Gianluca (INFN, Rome) ; Dubos, Sebastien (Orsay, LAL) ; Iacoangeli, Francesco (INFN, Rome) ; Montesano, Simone (CERN) ; Puill, Véronique (Orsay, LAL) ; Scandale, Walter (CERN) ; Stocchi, Achille (Orsay, LAL)
The UA9 experiment at CERN-SPS investigates the manipulation of high energy hadron beams using bent silicon crystals since 2009. Monitoring and characterization of channeled beams in the high energy accelerators environment ideally requires in-vacuum and radiation hard detectors. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IBIC2017-WEPCF04 Fulltext: PDF;
In : 6th International Beam Instrumentation Conference, Grand Rapids, MI, USA, 20 -24 Aug 2017, pp.WEPCF04

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2019-02-21
06:42
The LHC Beam Gas Vertex Detector - a Non-Invasive Profile Monitor for High Energy Machines / Vlachos, Sotiris (CERN) ; Alexopoulos, Andreas (CERN) ; Barchel, Colin (CERN ; Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Bay, Aurelio (Ecole Polytechnique, Lausanne) ; Blanc, Frederic (Ecole Polytechnique, Lausanne) ; Bravin, Enrico (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chritin, Nicolas (CERN) ; Dehning, Bernd (CERN) ; Ferro-Luzzi, Massimiliano (CERN) et al.
The Beam Gas Vertex (BGV) monitor is being developed as part of the High Luminosity LHC project with the aim of providing measurements with less than 5% error on the beam size with an integration time of 5 minutes. It will be the only instrument capable of non-invasive beam size measurement throughout the LHC acceleration cycle with high intensity physics beams. [...]
2018 - 7 p. - Published in : 10.18429/JACoW-IBIC2017-WE3AB1 Fulltext: PDF;
In : 6th International Beam Instrumentation Conference, Grand Rapids, MI, USA, 20 -24 Aug 2017, pp.WE3AB1

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2019-02-21
06:42
First Beam Tests at the CERN SPS of an Electro-Optic Beam Position Monitor for the HL-LHC / Arteche, Alberto (Royal Holloway, U. of London) ; Bashforth, Sophie (JAI, UK) ; Boorman, Gary (Royal Holloway, U. of London ; JAI, UK) ; Bosco, Alessio (Royal Holloway, U. of London ; JAI, UK) ; Chritin, Nicolas (CERN) ; Gibson, Stephen (Royal Holloway, U. of London ; JAI, UK) ; Krupa, Michal (CERN) ; Lefèvre, Thibaut (CERN) ; Levens, Thomas (CERN)
An Electro-Optic Beam Position Monitor is being developed for the HL-LHC, aimed at the detection of high order proton bunch instabilities and as a diagnostic for crabbed bunch rotation. A prototype EO-BPM was installed in the CERN SPS during 2016 and recent first beam tests of the EO pick-up are presented. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IBIC2017-TUPCF23 Fulltext: PDF;
In : 6th International Beam Instrumentation Conference, Grand Rapids, MI, USA, 20 -24 Aug 2017, pp.TUPCF23

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2019-02-21
06:42
Performance of the AWAKE Proton Beam Line Beam Position Measurement System at CERN / Barros Marin, Manoel (CERN) ; Boccardi, Andrea (CERN) ; Bogey, Thierry (CERN) ; Boix Gargallo, Juan (ICREA, Barcelona) ; Gonzalez, Jose (CERN) ; Jensen, Lars (CERN) ; Lefèvre, Thibaut (CERN) ; Medina, David (CERN) ; Wendt, Manfred (CERN)
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE), based at CERN, explores the use of a proton driven plasma wake-field to accelerate electrons at high energies over short distances. This paper introduces the Beam Position Measurement (BPM) system of the proton beamline and its performance. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IBIC2017-TUPCF06 Fulltext: PDF;
In : 6th International Beam Instrumentation Conference, Grand Rapids, MI, USA, 20 -24 Aug 2017, pp.TUPCF06

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2019-02-21
06:42
Digital Signal Processing Techniques to Monitor Bunch-by-Bunch Beam Positions in the LHC for Machine Protection Purposes / Pospisil, Jan (CERN) ; Bjorkqvist, Oskar (CERN) ; Boccardi, Andrea (CERN) ; Wendt, Manfred (CERN)
This paper presents the development of an upgrade to the beam position interlock system for the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN). The beam orbit at the beam dump kicker is continuously monitored by 16 beam position monitors that are part of the machine protection system. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IBIC2017-TU3AB3 Fulltext: PDF;
In : 6th International Beam Instrumentation Conference, Grand Rapids, MI, USA, 20 -24 Aug 2017, pp.TU3AB3

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2019-02-19
04:10
A magnetic spectrometer to measure electron bunches accelerated at AWAKE / AWAKE Collaboration
A magnetic spectrometer has been developed for the AWAKE experiment at CERN in order to measure the energy distribution of bunches of electrons accelerated in wakefields generated by proton bunches in plasma. [...]
arXiv:1902.05752.
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Fulltext

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2019-02-18
14:21
MD#4164: Separatrix folding with octupoles during slow extraction at SPS / Stoel, Linda (Vienna University of Technology (AT)) ; Fraser, Matthew Alexander (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Velotti, Francesco Maria (CERN)
The powering of the SPS main octupole circuit (LOF) during third-integer slow extraction was tested to reduce the density of the beam impinging the wires of the electrostatic extraction septum (ZS) [...]
CERN-ACC-NOTE-2019-0004.
- 2019.
Full text

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2019-02-16
06:25
The ELENA facility / Bartmann, Wolfgang (CERN) ; Belochitskii, Pavel (CERN) ; Breuker, Horst (CERN) ; Butin, Francois (CERN) ; Carli, Christian (CERN) ; Eriksson, Tommy (CERN) ; Oelert, Walter (Mainz U.) ; Ostojic, Ranko (CERN) ; Pasinelli, Sergio (CERN) ; Tranquille, Gerard /ELENA ; AD
The CERN Antiproton Decelerator (AD) provides antiproton beams with a kinetic energy of 5.3 MeV to an active user community. The experiments would profit from a lower beam energy, but this extraction energy is the lowest one possible under good conditions with the given circumference of the AD. [...]
2018 - 10 p. - Published in : Philos. Trans. R. Soc. Lond. A 376 (2018) 20170266
In : Antiproton Physics in the ELENA Era : Theo Murphy meeting, Newport Pagnell, Buckinghamshire, UK, 4 - 5 Sep 2017, pp.20170266

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2019-02-14
07:22
Upgrade of the NA61/SHINE Facility beyond 2020 for an Expanded Physics Programme / Larsen, Dag (Jagiellonian U.) /NA61/SHINE
The NA61/SHINE experiment studies hadron production in hadron-hadron, hadron-nucleus and nucleus-nucleus collisions. The physics programme includes the study of the onset of deconfinement and search for the critical point as well as reference measurements for neutrino and cosmic ray experiments. [...]
2019 - 18 p. - Published in : Universe 5 (2019) 24 Fulltext from Publisher: PDF;
In : 7th International Conference on New Frontiers in Physics, Kolymbari, Crete, Greece, 4 - 12 Jul 2018, pp.24

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2019-02-14
05:02
Simulations of an energy dechirper based on dielectric lined waveguides / Nie, Y. (CERN) ; Xia, G. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Pacey, T. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.)
Terahertz frequency wakefields can be excited by ultra-short relativistic electron bunches travelling through dielectric lined waveguide (DLW) structures. These wakefields can either accelerate a witness bunch with high gradient, or modulate the energy of the driving bunch. [...]
arXiv:1711.07244.- 2018-11-12 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 909 (2018) 271-275 Fulltext from Publisher: PDF; Preprint: PDF;
In : 3rd European Advanced Accelerator Concepts Workshop, La Biodola, Isola d'Elba, Italy, 24 - 30 Sep 2017, pp.271-275

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