2018-10-20
06:01 |
Windability Tests of Nb$_3$Sn Rutherford Cables for HL-LHC and FCC
/ Pulikowski, D (CERN ; West Pomeranian U. of Tech., Szczecin) ; Lackner, F (CERN) ; Scheuerlein, C (CERN) ; Savary, F (CERN) ; Tommasini, D (CERN) ; Pajor, M (West Pomeranian U. of Tech., Szczecin)
In the framework of the development of high field magnets made of Nb$_3$Sn superconductors for projects like the high luminosity upgrade of the large hadron collider (HL-LHC) and FCC studies, it is necessary to refine the understanding of the winding process and its impact of the overall mechanical integrity of the conductor. The mechanical behavior during winding of the unreacted Rutherford-type Nb$_3$Sn cables has been studied experimentally. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4003905
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4003905
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2018-10-20
06:01 |
Quench Behavior of the HL-LHC Twin Aperture Orbit Correctors
/ Mentink, Matthias (CERN) ; van Nugteren, Jeroen (CERN) ; Mangiarotti, Franco (CERN) ; Duda, Michal (CERN ; Cracow, INP) ; Kirby, Glyn (CERN)
A study was performed to understand the quench behavior and ensure adequate quench protection of the canted cosine theta (CCT) twin aperture orbit corrector magnet, a superconducting magnet under development as part of the high-luminosity upgrade of the Large Hadron Collider (HL-LHC). The cosine theta geometry features canted superconducting coils, which together produce a magnetic dipole field. [...]
2018 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4004806
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4004806
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2018-10-20
06:01 |
Friction Coefficient Between the Ti6Al4V Loading Pole and the 316LN Steel Shims of the HL-LHC 11 T Magnets
/ Gradt, Thomas (BAM, Berlin) ; Scheuerlein, Christian (CERN) ; Lackner, F (CERN) ; Savary, F (CERN)
As part of the Large Hadron Collider High Luminosity upgrade (HL-LHC) project, 11 Tesla Nb$_3$Sn dipole magnets will replace some of the existing 8.33 T NbTi LHC main dipole magnets. The 11 T dipole coils are mechanically loaded through a removable Ti6Al4V pole wedge. [...]
2018 - 3 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4005703
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4005703
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2018-10-20
06:01 |
Experimental investigation of new ultra-lightweight support and cooling structures for the new Inner Tracking System of the ALICE Detector
/ Zherebchevsky, V I (St. Petersburg State U.) ; Altsybeev, I G (St. Petersburg State U.) ; Feofilov, G A (St. Petersburg State U.) ; Francescon, A (CERN) ; Gargiulo, C (CERN) ; Igolkin, S N (St. Petersburg State U. ; CERN) ; Krymov, E B (St. Petersburg State U.) ; Laudi, E (CERN) ; Lazareva, T V (St. Petersburg State U.) ; Maltsev, N A (St. Petersburg State U.) et al.
Thermal cooling performances of extremely lightweight mechanical carbon fiber support structures with an integrated liquid cooling system for monolithic silicon pixel detectors have been investigated. The high heat removal efficiency using single-phase liquid flow is shown for a power density up to 0.5 W/cm$^2$. [...]
2018 - 16 p.
- Published in : JINST 13 (2018) T08003
Fulltext: pdf - PDF; 10.1088_1748-0221_13_08_T08003 - PDF;
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2018-10-20
06:01 |
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2018-10-20
06:01 |
Numerical simulation of long rods impacted by particle beams
/ Portelli, Marcus (CERN ; U. Malta) ; Bertarelli, A (CERN) ; Carra, F (CERN) ; Mettler, L K (CERN) ; Mollicone, P (U. Malta) ; Sammut, N (U. Malta)
Analytical solutions detailing the propagation of longitudinal waves in slender rods subjected to a sudden increase of internal energy provide simple tools for the calculation of the temperature distribution in impacted rods as well as the resulting mechanical response. The topic is of great interest in particle accelerator technology, especially with regards to collimation systems, where beam intercepting devices can be generally approximated to one-dimensional (1D) elements potentially subjected, in accidental scenarios, to abrupt thermal energy depositions induced by the impacting particles. [...]
2018 - 13 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 063501
Fulltext: PDF;
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2018-10-20
06:01 |
Effects of inhomogeneities on pinning force scaling in Nb$_3$Sn wires
/ Baumgartner, Thomas (Vienna, Tech. U., Atominst.) ; Pfeiffer, S (Vienna, Tech. U.) ; Bernardi, Johannes (Vienna, Tech. U.) ; Ballarino, A (CERN) ; Eisterer, Michael (Vienna, Tech. U., Atominst.)
We analyzed the effects of A-15 phase inhomogeneities, in particular Sn concentration gradients, on the pinning force scaling behavior of Nb3Sn wires. This was accomplished using a software code capable of simulating both magnetization and transport measurements on wires containing sub-elements with an arbitrary (e.g. [...]
2018 - 11 p.
- Published in : Supercond. Sci. Technol. 31 (2018) 084002
Fulltext: pdf - PDF; document - PDF;
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2018-10-20
06:01 |
A low-power laserwire profile monitor for H$^{-}$ beams: Design and experimental results
/ Hofmann, T (JAI, UK ; CERN) ; Boorman, G E (JAI, UK) ; Bosco, A (JAI, UK) ; Gibson, S M (JAI, UK) ; Roncarolo, F (CERN)
An instrument to non-destructively measure the transverse profile of an H − beam has been developed and tested at CERN’s new LINAC4. The vertical profile of the H − beam has been measured, at beam commissioning energies of 50, 80 and 107 MeV. [...]
2018 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 903 (2018) 140-146
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2018-10-20
06:01 |
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2018-10-20
06:01 |
Design, fabrication, and high-gradient testing of an $X$-band, traveling-wave accelerating structure milled from copper halves
/ Argyropoulos, Theodoros (CERN) ; Catalan-Lasheras, Nuria (CERN) ; Grudiev, Alexej (CERN) ; Mcmonagle, Gerard (CERN) ; Rodriguez-Castro, Enrique (CERN) ; Syrachev, Igor (CERN) ; Wegner, Rolf (CERN) ; Woolley, Ben (CERN) ; Wuensch, Walter (CERN) ; Zha, Hao (CERN) et al.
A prototype 11.994 GHz, traveling-wave accelerating structure for the Compact Linear Collider has been built, using the novel technique of assembling the structure from milled halves. The use of milled halves has many advantages when compared to a structure made from individual disks. [...]
2018 - 11 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 061001
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