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SPS and CNGS

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2019-01-15
17:02
International Advisory Committee Final Statement on the FCC CDRs / Dissertori, Guenther (ETH Zurich (CH))
The International Advisory Committee (IAC) for the Future Circular Collider (FCC) study has followed the activities of the FCC study group during the years 2017-2018, according to its mandate given by the FCC Steering Committee. This mandate consisted in reviewing the scientific and technical progress and considering, for each of the numerous FCC study areas, the questions related to the readiness level required for a Conceptual Design Report (CDR) were asked. [...]
CERN-ACC-2019-0008.- Geneva : CERN, 2019 Fulltext: PDF;

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2019-01-15
09:36
Magnetic Frequency Response of High-Luminosity Large Hadron Collider Beam Screens / Morrone, Marco (CERN, Imperial College London) ; Martino, Michele (CERN) ; De Maria, Riccardo (CERN) ; Fitterer, Miriam (FNAL) ; Garion, Cedric (CERN)
Magnetic fields used to control particle beams in accelerators are usually controlled by regulating the electrical current of the power converters. [...]
CERN-ACC-2019-0004. - 2019. - 22 p.
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2019-01-15
06:22
Dynamic Testing and Characterization of Advanced Materials in a New Experiment at CERN HiRadMat Facility / Bertarelli, Alessandro (CERN) ; Accettura, Carlotta (CERN ; Milan Polytechnic) ; Berthomé, Emmanuel (CERN) ; Bianchi, Laura (CERN) ; Bolz, Philipp (Darmstadt, GSI) ; Carra, Federico (CERN) ; Fichera, Claudio (CERN) ; Frankl, Matthias (CERN) ; Furness, Thomas (Huddersfield U.) ; Gobbi, Giorgia (CERN) et al.
An innovative and comprehensive experiment (named “Multimat”) was successfully carried out at CERN HiRadMat facility on 18 different materials relevant for Collimators and Beam Intercepting Devices. Material samples, tested under high intensity proton pulses of 440 GeV/c, exceeding the energy density expected in HL-LHC, ranged from very light carbon foams to tungsten heavy alloys, including novel composites as graphite/carbides and metal/diamond without and with thin-film coatings. [...]
2018 - 8 p. - Published in : (2018) , pp. WEPMF071
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 8, pp. 082021 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF071

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2019-01-15
06:22
Challenges and Status of Tuning Simulations for CLIC Traditional Beam Delivery System / Bodenstein, Ryan (JAI, UK) ; Burrows, Philip (JAI, UK) ; Marín, Eduardo (CERN)
The beam delivery system (BDS) for the 3 TeV version of the Compact Linear Collider (CLIC) has two main design types. One type is referred to as the local scheme, as it is approximately one kilometer shorter and corrects the chromaticity in both planes. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-MOPML010 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPML010

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2019-01-15
06:22
LHC/FCC-based muon colliders / Zimmermann, Frank (CERN)
In recent years, three schemes for producing low-emittance muon beams have been proposed: (1) positron-electron annihilation above threshold using a positron storage ring with a thin target, (2) laser/FEL-photon back-scattering off high-energy proton beams circulating in the LHC or FCC-hh, (3) the Gamma factory concept where partially stripped heavy ions collide with a laser pulse to directly generate muons. The Gamma factory would also deliver copious amounts of positrons which could in turn be used as source for option (1). [...]
2018 - 7 p. - Published in : (2018) , pp. MOPMF065
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 2, pp. 022017 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF065

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2019-01-15
06:22
LIU Space Charge Studies for the LHC Pre-Accelerators / Schmidt, Frank (CERN) ; Bartosik, Hannes (CERN)
In 2011 a working group has been started to study performance limitations due to Space Charge (SC) in the four LHC pre-accelerators, LEIR, PSB, PS & SPS, in view of the LHC Injector Upgrade (LIU) project. To this end external and in-house simulation tools have been benchmarked for the LIU study cases with the long-term goal of providing a full sequence of tested CERN Space Charge tools. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUPAF048 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF048

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2019-01-15
06:22
Conceptual Design of a Collimation System for the CERN Super Proton Synchrotron / Patecki, Marcin (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The Super Proton Synchrotron (SPS) is the last accelerator in the LHC Injectors Chain. Its performance is constantly being improved in frame of the LHC Injectors Upgrade (LIU) Project in order to prepare it for the future HL-LHC (High Luminosity LHC) operation. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUPAF046 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF046

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2019-01-15
06:22
Characterization of Losses and Emittance Growth for Ion Beams on the SPS Injection Plateau / Saá Hernández, Angela (CERN) ; Antoniou, Fanouria (CERN) ; Bartosik, Hannes (CERN) ; Huschauer, Alexander (CERN)
Losses and transverse emittance growth in the Super Protron Synchrotron (SPS) impose presently the main performance limitation on the Large Hadron Collider (LHC) ion injector chain. In this paper we present the measurements performed in 2016 with Pb82+ ions and the analysis to characterize the observations of beam degradation during the long injection plateau. [...]
2018 - 6 p. - Published in : (2018) , pp. THPAF054
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 6, pp. 062019 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF054

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2019-01-15
04:16
Particle physics applications of the AWAKE acceleration scheme / Caldwell, A. (Munich, Max Planck Inst.) ; Chappell, J. (University Coll. London) ; Crivelli, P. (ETH, Zurich (main)) ; Depero, E. (ETH, Zurich (main)) ; Gall, J. (CERN) ; Gninenko, S. (Moscow, INR) ; Gschwendtner, E. (CERN) ; Hartin, A. (University Coll. London) ; Keeble, F. (University Coll. London) ; Osborne, J. (CERN) et al.
The AWAKE experiment had a very successful Run 1 (2016-8), demonstrating proton-driven plasma wakefield acceleration for the first time, through the observation of the modulation of a long proton bunch into micro-bunches and the acceleration of electrons up to 2 GeV in 10 m of plasma. [...]
arXiv:1812.11164. - 12 p.
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2019-01-11
05:03
AWAKE: On the path to particle physics applications / Caldwell, Allen (Garching, Max Planck Inst. Plasmaphys.) ; Gschwendtner, Edda (CERN) ; Lotov, Konstantin (Novosibirsk, IYF ; Novosibirsk State U.) ; Muggli, Patric (Garching, Max Planck Inst. Plasmaphys. ; CERN) ; Wing, Matthew (University Coll. London)
Proton-driven plasma wakefield acceleration allows the transfer of energy from a proton bunch to a trailing bunch of particles, the `witness' particles, via plasma electrons. [...]
arXiv:1812.08550. - 11 p.
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