CERN Accelerating science

All CERN Accelerators documents

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2018-12-08
06:01
Development of the AWAKE Stripline BPM Electronics / Liu, Shengli (TRIUMF) ; Verzilov, Victor (TRIUMF) ; Farabolini, Wilfrid (CERN) ; Doebert, Steffen (CERN) ; Schmidt, Janet S (CERN)
The stripline BPMs of AWAKE (The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN) are required to measure the position of the single electron bunch with a resolution of 10 um rms, for the bunch charge of 100 pC to 1 nC. This paper presents a AFE-Digital processing system developed at TRIUMF (Canada) which achieved such performance. [...]
2018 - 6 p. - Published in : Springer Proc. Phys. 212 (2018) 237-242
In : International Conference on Technology and Instrumentation in Particle Physics 2017, Beijing, China, 21 - 26 May 2017, pp.237-242

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2018-12-07
12:38
Space charge impedance and electromagnetic field sin elliptical vacuum chambers / Migliorati, Mauro (Sapienza Universita e INFN, Roma I (IT)) ; Biancacci, Nicolo (CERN) ; Masullo, Maria Rosaria (Universita e sezione INFN di Napoli (IT)) ; Palumbo, Luigi (Sapienza Universita e INFN, Roma) ; Vaccaro, Vittorio (Universita e sezione INFN di Napoli (IT))
Starting from the electric fields produced by a point charge and a dipole travelling inside a circular vacuum chamber, in this paper we derive a formalism for a complete set of equations that describe the electromagnetic fields and the longitudinal and transverse coupling impedance arising by the interactions of a beam with a perfectly conducting pipe in the case of elliptic geometry [...]
CERN-ACC-NOTE-2018-0080.
- 2018. - 23 p.

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2018-12-07
10:50
Dynamic aperture studies for HL-LHC V1.0 / Cai, Yunhai ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Nosochkov, Yuri (SLAC National Accelerator Laboratory (US)) ; Van Der Veken, Frederik (University of Malta (MT))
Intense efforts have been devoted to the detailed study of the dynamic aperture of the HL-LHC V1.0 optics and layout version, without beam-beam effects, for several configurations, differing by optical properties or properties of the field quality of the new magnets for HL-LHC [...]
CERN-ACC-2018-0054.
- 2018. - 42 p.

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2018-12-07
05:30
Opportunities in Machine Learning for Particle Accelerators / Edelen, Auralee (SLAC) ; Mayes, Christopher (Fermilab) ; Bowring, Daniel (SLAC) ; Ratner, Daniel (PSI, Villigen) ; Adelmann, Andreas (RadiaSoft, Boulder) ; Ischebeck, Rasmus (Cornell U.) ; Snuverink, Jochem (Cornell U.) ; Agapov, Ilya (DESY) ; Kammering, Raimund (DESY) ; Edelen, Jonathan (RadiaSoft, Boulder) et al.
Machine learning (ML) is a subfield of artificial intelligence. [...]
arXiv:1811.03172.
- 25 p.
Fulltext

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2018-12-05
06:11
Colliding High Brightness Beams in the LHC / Pieloni, T (CERN) ; Buffat, X (CERN) ; Herr, W (CERN) ; Giachino, R (CERN) ; Metral, E (CERN) ; Papotti, G (CERN)
The CERN-LHC is a high energy particle collider, where intense proton bunches are brought into collision. In order to achieve optimum performance, the bunches must have a high brightness, leading to strong and significant beam-beam effects. [...]
2012 - 3 p. - Published in : (2012) , pp. MOP250 Fulltext: PDF;
In : 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Beijing, China, 17 - 21 Sep 2012, pp.MOP250

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2018-12-05
06:11
Identification and Removal of SPS Aperture Limitations / Kain, Verena (CERN) ; Alemany-Fernández, Reyes (CERN) ; Bartosik, Hannes (CERN) ; Cettour Cave, Stephane (CERN) ; Cornelis, Karel (CERN) ; Cruikshank, Paul (CERN) ; Ferreira Somoza, Jose (CERN) ; Goddard, Brennan (CERN) ; Pasquino, Chiara (CERN)
The CERN SPS (Super Proton Synchrotron) serves as LHC injector and provides beam for the North Area fixed target experiments. Since the 2016 run automated local aperture scans have been performed with the main focus on the vertical plane where limitations typically arise due to the flat vacuum chambers in most SPS elements. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUPAF021 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF021

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2018-12-05
06:10
40 Years of Electron Cooling at CERN / Tranquille, Gerard (CERN)
For nearly 40 years electron cooling has been used extensively on the storage rings of the CERN accelerator complex for the accumulation of ions or for the improvement of beam quality for precision experiments. Since the first cooling experiments on ICE the coolers have evolved to incorporate the latest advances in electron cooling technology and many unique experiments have also been performed when the coolers are not used for everyday operation. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOZGBF3 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOZGBF3

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2018-12-05
06:10
The CERN-ELENA Electron Cooler Magnetic System / Tranquille, Gerard (CERN) ; Jørgensen, Lars (CERN) ; Luckin, David (Tesla Engineering, Storrington) ; Warner, Rory (Tesla Engineering, Storrington)
Phase space compression of the antiproton beam in ELENA will be performed by a new electron cooler the performance of which is greatly influenced by the properties of the electron beam. Careful design of the electron gun electrodes, the efficient recuperation of the electrons in the collector and the quality of the guiding magnetic field ensure an optimal performance of the cooler. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUPAF056 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF056

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2018-12-05
06:10
Upgrade of the CERN SPS Beam Position Measurement System / Wendt, Manfred (CERN) ; Barros Marin, Manoel (CERN) ; Boccardi, Andrea (CERN) ; Bogey, Thierry (CERN) ; Degl'Innocenti, Irene (CERN) ; Kain, Verena (CERN) ; Moran Guizan, Carla (CERN) ; Topaloudis, Athanasios (CERN)
The CERN Super Proton Synchrotron (SPS) is a fast cycling hadron accelerator delivering protons with momenta of up to 450 GeV/c for the Large Hadron Collider (LHC), fixed target experiments and other users such as the AWAKE plasma acceleration experiment, and also used to accelerate heavy ions. This paper presents the upgrade initiative for the SPS beam position measurement system in the frame of the CERN LHC Injector Upgrade (LIU) project. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPAF085 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPAF085

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2018-12-05
06:10
Commissioning the ELENA Beam Diagnostics Systems at CERN / Tranquille, Gerard (CERN) ; Burger, Stephane (CERN) ; Gąsior, Marek (CERN) ; Grandemange, Pierre (CERN) ; Levens, Thomas (CERN) ; Marqversen, Ole (CERN) ; Søby, Lars (CERN)
The Extra Low ENergy Antiproton ring (ELENA) at CERN entered the commissioning phase in November 2016 using H⁻ ions and antiprotons to setup the machine at the different energy plateaus. The low intensities and energy of the ELENA beam generate very weak signals making beam diagnostics very challenging. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPAF084 Fulltext: wepaf084 - PDF; 1690602_wepaf084 - PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPAF084

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