CERN Accelerating science

All CERN Accelerators documents

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2018-05-23
06:00
Autopilot regulation for the Linac4 H− ion source / Voulgarakis, G (CERN) ; Lettry, J (CERN) ; Mattei, S (CERN) ; Lefort, B (CERN) ; Correia Costa, V J (CERN)
Linac4 is a 160 MeV H− linear accelerator part of the upgrade of the LHC injector chain. Its cesiated surface H− source is designed to provide a beam intensity of 40-50mA. [...]
2017 - Published in : AIP Conf. Proc. 1869 (2017) 030012
In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030012

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2018-05-23
06:00
Characterization of the n_TOF EAR-2 neutron beam / Chen, Y H (Orsay, IPN) ; Tassan-Got, L (Orsay, IPN) ; Audouin, L (Orsay, IPN) ; Le Naour, C (Orsay, IPN) ; Durán, I (U. Santiago de Compostela (main)) ; Casarejos, E (Vigo U.) ; Aberle, O (CERN) ; Andrzejewski, J (U. Lodz (main)) ; Bécares, V (Madrid, CIEMAT) ; Bacak, M (TU Vienna) et al. /n_TOF
The experimental area 2 (EAR-2) at CERNs neutron time-of-flight facility (n_TOF), which is operational since 2014, is designed and built as a short-distance complement to the experimental area 1 (EAR-1). The Parallel Plate Avalanche Counter (PPAC) monitor experiment was performed to characterize the beam profile and the shape of the neutron flux at EAR-2. [...]
2017 - 4 p. - Published in : EPJ Web Conf. 146 (2017) 03020 Fulltext: PDF;
In : ND 2016 International Conference on Nuclear Data for Science and Technology, Bruges, Belgium, 11 - 16 Sep 2016, pp.03020

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2018-05-22
16:30
Social Cost Benefit Analysis of HL-LHC / Bastianin, Andrea (Università degli Studi e INFN Milano (IT)) ; Florio, Massimo (Università degli Studi e INFN Milano (IT))
We present a Social Cost–Benefit Analysis (CBA) of the High Luminosity upgrade of the Large Hadron Collider (HL-LHC), assessing its economic costs and benefits up to 2038. The Net Present Value (NPV) of the HL-LHC project is positive at the end of the observation period. [...]
CERN-ACC-2018-0014.- Geneva : CERN, 2018 Fulltext: FCC-1805221620-ABA_OverviewCBA_HLLHCandFCC - XLSX; FCC-1805221620-ABA_OverviewCBA_HLLHCandFCC_2 - XLSX; CERN-ACC-2018-0014 - PDF;

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2018-05-22
11:55
LHCb Upgrades and operation at 1034 cm-2 s-1 luminosity –A first study / Efthymiopoulos, Ilias (CERN) ; Arduini, Gianluigi (CERN) ; Baglin, Vincent (CERN) ; Burkhardt, Helmut (CERN) ; Cerutti, Francesco (CERN) ; Claudet, Serge (CERN) ; Di Girolamo, Beniamino (CERN) ; De Maria, Riccardo (CERN) ; Esposito, Luigi Salvatore (CERN) ; Karastathis, Nikos (CERN) et al.
Presently, the LHCb experiment at IP8 operates at reduced luminosity (~4.0 1032 cm-2 s-1) compared to ATLAS and CMS experiments. [...]
CERN-ACC-NOTE-2018-0038.
- 2018.

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2018-05-19
23:25
Effects of Resonant and Random Excitations on the Proton Beam in the Large Hadron Collider, with Applications to the Design of Pulsed Hollow Electron Lenses for Active Halo Control / Fitterer, Miriam (Fermilab) ; Stancari, Giulio (Fermilab) ; Valishev, Alexander (Fermilab) ; Redaelli, Stefano (CERN) ; Valuch, Daniel (CERN)
We present the results of numerical simulations and experimental studies about the effects of resonant and random excitations on proton losses, emittances, and beam distributions in the Large Hadron Collider (LHC). [...]
FERMILAB-PUB-18-084-AD-APC ; arXiv:1804.07418.
- 30 p.
FERMILABPUB - Fulltext - Fulltext

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2018-05-19
18:58
Effects of Resonant and Random Excitations on the Proton Beam in the Large Hadron Collider, with Applications to the Design of Pulsed Hollow Electron Lenses for Active Halo Control / Fitterer, Miriam (Fermilab) ; Stancari, Giulio (Fermilab) ; Valishev, Alexander (Fermilab) ; Redaelli, Stefano (CERN) ; Valuch, Daniel (CERN)
We present the results of numerical simulations and experimental studies about the effects of resonant and random excitations on proton losses, emittances, and beam distributions in the Large Hadron Collider (LHC). [...]
FERMILAB-PUB-18-084-AD-APC ; arXiv:1804.07418.
- 30 p.
FERMILABPUB - Fulltext - Fulltext

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2018-05-19
06:04
Magnetic Measurements on the First CERN-Built Models of the Insertion Quadrupole MQXF for HL-LHC / Fiscarelli, L (CERN) ; Bajas, H (CERN) ; Dunkel, O (CERN) ; Ferracin, P (CERN) ; Izquierdo Bermudez, S (CERN) ; Russenschuck, S (CERN) ; Todesco, E (CERN) ; Ambrosio, G (Fermilab)
The high-luminosity upgrade of the large hadron collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). CERN and LARP are currently collaborating to develop a 150-mm-aperture quadrupole based on Nb$_3$Sn superconducting cables for the coils, and an aluminum shell with the bladder-key technology for the support structure. [...]
2017 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4002605

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2018-05-16
06:13
Towards REBCO 20T+ dipoles for accelerators / van Nugteren, Jeroen (CERN) ; Kirby, Glyn (CERN) ; Murtomäki, Jaakko (CERN) ; DeRijk, Gijs (CERN) ; Rossi, Lucio (CERN) ; Stenvall, Antti (Tampere U. of Tech.)
ReBCO high temperature superconducting (HTS) coated conductor tapes are a promising candidate for pushing the magnetic fields in accelerator magnets well beyond 20 T. They are capable of very high current densities in intense applied magnetic field, have a very high thermal stability, can withstand high transverse pressures and allow operation in 20–30 K helium gas flow, potentially reducing operating cost significantly. [...]
2018 - 9 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4008509
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4008509

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2018-05-16
06:13
Measurement and Analysis of the Dynamic Effects in an HTS Dipole Magnet / Petrone, Carlo (CERN) ; van Nugteren, Jeroen (CERN) ; Bajas, Hugues (CERN) ; Bottura, Luca (CERN) ; Kirby, Glyn (CERN) ; Rossi, Lucio (CERN) ; Russenschuck, Stephan (CERN)
The EuCARD-2 project, co-funded by the European Commission, supports the design, production and standalone cold testing of a high-temperature, superconducting demonstrator insert-magnet. The so-called Feather-M2 dipole magnet was built at CERN, using Roebel cable consisting of REBCO coated conductor tapes. [...]
2018 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4604404
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4604404

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2018-05-16
06:13
A conceptual solution for a beam halo collimation system for the Future Circular hadron–hadron Collider (FCC-hh) / Fiascaris, M (CERN) ; Bruce, R (CERN) ; Redaelli, S (CERN)
We present the first conceptual solution for a collimation system for the hadron–hadron option of the Future Circular Collider (FCC-hh). The collimation layout is based on the scaling of the present Large Hadron Collider collimation system to the FCC-hh energy and it includes betatron and momentum cleaning, as well as dump protection collimators and collimators in the experimental insertions for protection of the final focus triplet magnets. [...]
2018 - 11 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 894 (2018) 96-106 Fulltext: PDF;

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