CERN Accelerating science

SPS and CNGS

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2019-09-12
09:23
Noninvasive 3D field mapping of complex static electric fields / Kainz, Andreas (TU Vienna) ; Keplinger, Franz (TU Vienna) ; Hortschitz, Wilfried (Danube U., Krems) ; Kahr, Matthias (Danube U., Krems) ; Steiner, Harald (Danube U., Krems) ; Stifter, Michael (Danube U., Krems) ; Hunt, James R (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Resta-Lopez, Javier (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Rodin, Volodymyr (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Welsch, Carsten P (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) et al.
Many upcoming experiments in antimatter research require low-energy antiproton beams. With a kinetic energy in the order of 100 keV, the standard magnetic components to control and focus the beams become less effective. [...]
2019 - 6 p. - Published in : Phys. Rev. Lett. 122 (2019) 244801 Article from SCOAP3: PDF;

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2019-09-11
07:14
Design optimization and evaluation of the 3 kA MgB$_2$ cable at 4.3 K for the superconducting link project at CERN / Konstantopoulou, K (CERN) ; Hurte, J (CERN) ; Retz, P W (CERN) ; Ballarino, A (CERN)
High-current superconducting links (SC links) are being developed at CERN for powering the superconducting magnets of the High-Luminosity Large Hadron Collider upgrade. The links contain MgB$_2$ cables, each about 100 m long, rated at currents of up to 18 kA. [...]
2019 - 10 p. - Published in : Supercond. Sci. Technol. 32 (2019) 085003

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2019-09-10
06:50
Transient heat transfer in superfluid helium cooled Nb$_3$Sn superconducting coil samples / Xavier, Mário D Grosso (CERN) ; Schundelmeier, Jens (CERN) ; Winkler, Tiemo (CERN) ; Koettig, Torsten (CERN) ; van Weelderen, Rob (CERN) ; Bremer, Johan (CERN)
An experimental setup is operational at the Central Cryogenics Laboratory of the European Organization for Nuclear Research to measure the cooling mechanisms of superfluid $^4$He (He II) from prepared Rutherford-type superconducting cable stacks to a stagnant He II bath. For novel magnets designed for the so-called high-luminosity large hadron collider upgrade, a segment of a fully impregnated Nb$_3$Sn 11T dipole magnet was measured. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 9500105

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2019-09-07
06:30
Superconducting detector magnets baseline designs for particle physics experiments at the Future Circular Collider / Bielert, Erwin (CERN ; Illinois U., Urbana (main)) ; Berriaud, Christophe (Saclay) ; Cure, Benoit (CERN) ; Dudarev, Alexey (CERN) ; Gaddi, Andrea (CERN) ; Gerwig, Hubert (CERN) ; Ilardi, Veronica (Twente U., Enschede ; CERN) ; Klyukhin, Vyacheslav (Lomonosov Moscow State U. ; CERN) ; Kulenkampff, Tobias K D (CERN ; TU Vienna) ; Mentink, Matthias (CERN) et al.
In early 2014 a design study started at CERN for a Future Circular Collider. A new tunnel with a circumference of about 100 km for the collider magnets is foreseen as well as new general-purpose particle detectors to probe electron-positron (e$^-$e$^+$), electron-hadron (eh), and hadron-hadron (hh) collisions, housed in large underground caverns. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4500305

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2019-09-07
06:30
Modeling of beam loss induced quenches in the LHC main dipole magnets / Breschi, Marco (U. Bologna (main)) ; Felcini, Enrico (CERN) ; Breccia, Francesca (U. Bologna (main)) ; Granieri, P P (CERN) ; Bergonzoni, Eleonora (U. Bologna (main)) ; Bevilacqua, Alessandro (U. Bologna (main)) ; Galassi, Pietro (U. Bologna (main)) ; Winkler, Tiemo (Twente U., Enschede) ; Bottura, Luca (CERN)
The full energy exploitation of the Large Hadron Collider (LHC), a planned increase of the beam energy beyond the present 6.5 TeV, will result in more demanding working conditions for the superconducting dipoles and quadrupoles operating in the machine. It is hence crucial to analyze, understand, and predict the quench levels of these magnets for the required values of current and generated magnetic fields. [...]
2019 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4004407

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2019-09-07
06:30
Magnetic measurements on the prototype magnets of the high-order correctors for HL-LHC / Fiscarelli, Lucio (CERN) ; Bajas, Hugo (CERN) ; Mangiarotti, Franco (CERN) ; Musso, Andrea (CERN) ; Russenchuck, Stephan (CERN) ; Mariotto, Samuele (LASA, Segrate ; Milan U.) ; Sorbi, Massimo (LASA, Segrate ; Milan U.) ; Statera, Marco (LASA, Segrate)
The National Institute for Nuclear Physics (INFN) is developing, at the Laboratory of Accelerators and Applied Superconductivity (LASA Milan, Italy), five families of corrector magnets, from skew quadrupole up to dodecapole order, which will be installed in the interaction regions of the High-Luminosity Large Hadron Collider (LHC). These magnets are based on a superferric design, which allows a relatively simple, compact and easy-to-construct magnets. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4003505

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2019-09-06
19:21
LHC TI2/TI8 TL Stability Check RUN II / Barbera Ramos, Moises
This document presents a study of the stability of transfer lines (TL) TI2 and TI8 from the SPS to the LHC during RUN II. [...]
CERN-STUDENTS-Note-2019-186.
- 2019.
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2019-09-05
06:35
Demonstration of a cavity-based pulse compression system for pulse shape correction / Jiang, Yuliang (Tsinghua U., Beijing) ; Zha, Hao (Tsinghua U., Beijing) ; Wang, Ping (Tsinghua U., Beijing) ; Shi, Jiaru (Tsinghua U., Beijing) ; Chen, Huaibi (Tsinghua U., Beijing) ; Millar, William L (CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Syratchev, Igor (CERN)
A compact X-band correction cavity chain (CC) has been successfully designed, fabricated and high power tested for the Compact Linear Collider (CLIC) project. The CC consists of eight spherical cavities and four polarizers, and each spherical cavity has a $Q_0$ of 45 000 and a diameter of 7 cm. [...]
2019 - 6 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 082001 External link: Fulltext

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2019-09-05
06:35
Electro-magnetic performance of MgB$_2$ cables for the high current transmission lines at CERN / Konstantopoulou, K (CERN) ; Hurte, J (CERN) ; Fleiter, J (CERN) ; Ballarino, A (CERN)
Intense R&D; work is ongoing at CERN in the framework of the High Luminosity LHC (HL-LHC) upgrade for the development of high current transmission lines, known as Superconducting Links (SC Links). The SC Link is an assembly of cables made from reacted MgB$_2$ round wire. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4802205

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2019-09-05
06:35
Quench protection study of a 11 T Nb$_3$Sn model dipole for the High Luminosity LHC / Izquierdo Bermudez, Susana (CERN) ; Mangiarotti, Franco (CERN) ; Willering, Gerard (CERN) ; Bajko, Marta (CERN) ; Bottura, Luca (CERN) ; Ferradas Troitino, Jose (CERN) ; Guinchard, Michael (CERN) ; Savary, Frederic (CERN) ; Vallone, Giorgio (CERN)
The planned upgrade of the Large Hadron Collider collimation system requires the installation of 11 T Nb$_3$Sn dipole magnets in the dispersion suppressor areas. Due to the large stored energy density and the low copper stabilizer section, the quench protection of these magnets is particularly challenging. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4701005

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