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CERN Accelerating science


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Reduction of 400  GeV/c slow extraction beam loss with a wire diffuser at the CERN Super Proton Synchrotron / Goddard, Brennan (CERN) ; Balhan, Bruno (CERN) ; Borburgh, Jan (CERN) ; Esposito, Luigi (CERN) ; Fraser, Matthew Alexander (CERN) ; Jorat, Louise (CERN) ; Kain, Verena (CERN) ; Lolliot, Christophe (CERN) ; Stoel, Linda Susan (CERN) ; van Trappen, Pieter (CERN) et al.
Slow extraction of a quasicontinuous flux of high-energy protons is an important requirement for many high-energy physics experiments. This extraction type is associated with an unavoidable beam loss due to scattering on the thin septum element. [...]
2020 - 13 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 023501 Fulltext: PDF;

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Proton-Beam-Driven Plasma Acceleration / Adli, Erik (Oslo U.) ; Muggli, Patric (Munich, Max Planck Inst.)
We describe the main ideas, promises and challenges related to proton-driven plasma wakefield acceleration. Existing high-energy proton beams have the potential to accelerate electron beams to the TeV scale in a single plasma stage. [...]
WS, 2016 - 20 p. - Published in : Rev. Accel. Sci. Technol. 09 (2016) 85-104 Published fulltext: PDF;

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Numerical simulations of electron-cloud build up in circular accelerators in the presence of multimode-distribution beams / Cui, X. (Beijing, Inst. High Energy Phys.) ; Gilardoni, S. (CERN) ; Giovannozzi, M. (CERN) ; Iadarola, G. (CERN)
Electron cloud effects have become one of the main performance limitations for circular particle accelerators operating with positively-charged beams. [...]
- 10 p.

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PS Ripple Study during the 2019 Fermilab Booster Experiment / Schmidt, Frank (CERN) ; Eldred, Jeffrey (FERMILAB) ; Jensen, Chris (FERMILAB) ; Larson, Jeffrey (FERMILAB) ; Triplett, Kent A (FERMILAB)
S.02 has been one of the experiments of the 2019 Fermilab Booster Studies. [...]
- 2020. - 25 p.
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FLUKA simulations of the operational injection losses in TI8/IR8 / Ciccotelli, Alessia (CERN) ; Bracco, Chiara (CERN) ; Cerutti, Francesco (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew Alexander (CERN) ; Kain, Verena (CERN) ; Mereghetti, Alessio (CERN) ; Velotti, Francesco Maria (CERN)
This document describes the FLUKA studies of SPS-to-LHC injection losses. [...]
- 2020. - 25 p.
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First Operation for Stochastic Cooling of P-Bars in the CERN AD Using Optical Delay Notch Filter and Plans 2021 Operation / Höfle, Wolfgang (CERN) ; Arnaudon, Luca (CERN) ; Bjørsvik, Endre (CERN) ; Caspers, Fritz (CERN) ; Eriksson, Tommy (CERN) ; Louwerse, Reinier (CERN) ; Myklebust, Vebjorn Roed (CERN)
As part of the consolidation of the stochastic coolingsystem of the CERN Antiproton Decelerator a notch filter with optical delay lines has been developed. During the 2018 run of AD a notch filter with optical delay lines for the longitudinal stochastic cooling at 3.5 GeV/c was successfully tested with beam for the first time. [...]
2019 - 5 p. - Published in : 10.18429/JACoW-COOL2019-MOY01 Fulltext: 10.18429_JACoW-COOL2019-MOY01 - PDF; moy01 - PDF;
In : International Workshop on Beam Cooling and Related Topics, Novosibirsk, Russian Federation, September 23 - 27, 2019, pp.MOY01

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Noninvasive Micrometer-Scale Particle-Beam Size Measurement Using Optical Diffraction Radiation in the Ultraviolet Wavelength Range / Bergamaschi, M (CERN ; Royal Holloway, U. of London) ; Aryshev, A (KEK, Tsukuba) ; Karataev, P (Royal Holloway, U. of London) ; Kieffer, R (CERN ; Royal Holloway, U. of London) ; Lefevre, T (CERN) ; Mazzoni, S (CERN) ; Terunuma, N (KEK, Tsukuba) ; Yang, R (LPGP, Orsay)
We present recent achievements in the application of optical diffraction radiation (ODR) to the measurement of the transverse beam size of a 1.3 GeV micrometer-size electron beam performed with an instrument installed in the extended extraction line of the KEK Accelerator Test Facility. ODR is a recent technique for the measurement of the transverse size and emittance of highly relativistic particle beams. [...]
2020 - 13 p. - Published in : Phys. Rev. Applied 13 (2020) 014041 Fulltext: PDF;

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Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals / Scandale, W (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Natochii, A (CERN ; Orsay, LAL ; Taras Shevchenko U.) ; Rossi, R (CERN) ; Smirnov, G I (CERN ; Dubna, JINR) ; Zhovkovska, V (CERN ; Taras Shevchenko U.) ; Galluccio, F (INFN, Naples ; Naples U.) et al.
The rate of inelastic nuclear interactions in a short bent silicon crystal was precisely measured for the first time using a 180 GeV/c positive hadron beam produced in the North Experimental Area of the CERN SPS. An angular asymmetry dependence on the crystal orientation in the vicinity of the planar channeling minimum has been observed. [...]
2020 - 5 p. - Published in : Eur. Phys. J. C 80 (2020) 27 External link: Fulltext

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Mesure on-line de la position radiale moyenne du faisceau PS / van der Beken, H
- 1971.
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Design, construction, and beam tests of a rotatable collimator prototype for high-intensity and high-energy hadron accelerators / Markiewicz, T (SLAC) ; Bong, E (SLAC) ; Keller, L (SLAC) ; Smith, J (SLAC) ; Aberle, O (CERN) ; Accettura, C (CERN) ; Bertarelli, A (CERN) ; Berthome, E (CERN) ; Biancacci, N (CERN) ; Butcher, M (CERN) et al.
A rotatable-jaw collimator design was conceived as a solution to recover from catastrophic beam impacts which would damage a collimator at the Large Hadron Collider (LHC) or its High-Luminosity upgrade (HL-LHC). One such rotatable collimator prototype was designed and built at SLAC and delivered to CERN for tests with LHC-type circulating beams in the Super Proton Synchrotron (SPS). [...]
2019 - 15 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 123002

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