CERN Accelerating science

LHC

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2015-02-12
15:18
Accelerator Quality HTS Dipole Magnet Demonstrator Designs for the EuCARD-2, 5 Tesla 40 mm Clear Aperture Magnet / Kirby, GA (CERN) ; van Nugteren, J (CERN) ; Ballarino, A (CERN) ; Bottura, L (CERN) ; Chouika, N (CERN) ; Clement, S (CERN) ; Datskov, V (CERN) ; Fajardo, L (CERN) ; Fleiter, J (CERN) ; Gauthier, R (CERN) et al.
Future high-energy accelerators will need very high magnetic fields in the range of 20 T. [...]
CERN-ACC-2015-0024.
- 2015. - 6 p.
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2015-02-12
14:58
Coil End Optimization of the Nb3Sn Quadrupole for the High Luminosity LHC / Izquierdo Bermudez, S ; Ambrosio, G ; Bossert, R ; Cheng, D ; Ferracin, P ; Krave, ST ; Perez, JC ; Schmalzle, J ; Yu, M
As part of the Large Hadron Collider Luminosity upgrade (HiLumi-LHC) program, the US LARP collaboration and CERN are working together to design and build a 150 mm aperture quadrupole magnet that aims at providing a nominal gradient of 140 T/m. [...]
CERN-ACC-2015-0023.
- 2015. - 6 p.
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2015-02-10
17:41
Elastic anisotropy in multifilament Nb3Sn superconducting wires / Scheuerlein, C ; Fedelich, B ; Alknes, P ; Arnau, G ; Bjoerstad, R ; Bordini, B
The elastic anisotropy caused by the texture in the Nb3Sn filaments of PIT and RRP wires has been calculated by averaging the estimates of Voigt and Reuss, using published Nb3Sn single crystal elastic constants and the Nb3Sn grain orientation distribution determined in both wire types by Electron Backscatter Diffraction. At ambient temperature the calculated Nb3Sn E-moduli in axial direction in the PIT and the RRP wire are 130 GPa and 140 GPa, respectively. [...]
CERN-ACC-2015-0022.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;
In : Applied Superconductivity Conference 2014, Charlotte, NC, USA, 10 - 15 Aug 2014, pp.ASC 2014

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2015-02-10
08:13
Steady state heat transfer experimental studies of LHC superconducting cables operating in cryogenic environment of superfluid helium / Santandrea, Dario
The heat management is a basic and fundamental aspect of the superconducting magnets used in the CERN Large Hadron Collider [...]
CERN-THESIS-2014-248 - 101 p.

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2015-02-09
16:39
Transverse beams stability studies at the Large Hadron Collider / Buffat, Xavier
A charged particle beam travelling at the speed of light produces large electromagnetic wake fields which, through interactions with its surroundings, act back on the particles in the beam [...]
CERN-THESIS-2014-246 - Lausanne : Ecole Polytechnique, Lausanne, 2015-01-30. - 210 p.

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2015-02-09
11:50
Targets for R&D on Nb3Sn conductor for High Energy Physics / Ballarino, A (CERN) ; Bottura, L (CERN)
High Energy Physics has been consistently pushing the performance of technical superconductors, for the benefit of high field magnet technology. So far the workhorse for particle accelerators has been Nb-Ti, but the practical performance limit has been attained with the LHC. [...]
CERN-ACC-2015-0021.- Geneva : CERN, 2015 - 6 p. Fulltext: PDF;
In : Applied Superconductivity Conference 2014, Charlotte, NC, USA, 10 - 15 Aug 2014, pp.ASC 2014

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2015-02-09
11:03
Coupling Current and Hysteresis Losses of Bi2212 Round Wires with Twisted Filaments / Yang, I (-) ; Pelegrin, J (-) ; Young, EA (-) ; Falorio, I (-) ; Ballarino, A (CERN) ; Bottura, L (CERN) ; Miao, H (-) ; Huang, Y (-)
AC loss measurements have been carried out on Bi2212 round wires of different twist pitches. With systematical variation of sample temperature (5 K – 70 K) and ac field amplitude (≤0.2 T) as well as frequency (20 Hz – 2 kHz), this work shows (a) the full coupling of the non-twisted wire, (b) the uncoupling of sub-wires by twisting at moderate pitch up to 12 mm, (c) a relatively short time constant of milliseconds for the coupling current due to a high transverse resistivity, and (d) an effective (de)coupling diameter of 0.4mm about 1.6x of sub-wire bundles. [...]
CERN-ACC-2015-0020.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;
In : Applied Superconductivity Conference 2014, Charlotte, NC, USA, 10 - 15 Aug 2014, pp.ASC 2014

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2015-02-04
11:32
The High Luminosity Challenge: potential and limitations of High Intensity High Brightness in the LHC and its injectors / De Maria, R (CERN) ; Arduini, G (CERN) ; Banfi, D (CERN) ; Barranco, J (CERN) ; Bartosik, H (CERN) ; Benedetto, E (CERN) ; Bruce, R (CERN) ; Brüning, O (CERN) ; Calaga, R (CERN) ; Cerutti, F (CERN) et al.
High-intensity and high-brightness beams are key ingredients to maximize the LHC integrated luminosity and to exploit its full potential. [...]
CERN-ACC-2015-0018.
- 2014. - 5 p.
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2015-01-27
15:23
Ion Colliders / Fischer, W (Brookhaven National Laboratory, Upton, New York 11973, USA.) ; Jowett, J M (CERN, CH-1211 Geneva 23, Switzerland.)
High-energy ion colliders are large research tools in nuclear physics to study the Quark-Gluon-Plasma (QGP). The range of collision energy and high luminosity are important design and operational considerations. [...]
CERN-ACC-2015-0015.- Geneva : CERN, 2015 Fulltext: PDF;

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2015-01-21
09:15
Development of high $\beta^*$-optics for ALICE / Hermes, Pascal Dominik
This thesis describes a feasibility study for a special optical configuration in Insertion Region 2 (IR2) of the Large Hadron Collider (LHC), which is host of the ALICE detector [...]
CERN-THESIS-2013-370 - 114 p.

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