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2019-08-17
09:04
User defined elements in ANSYS for 2D multiphysics modeling of superconducting magnets / Brouwer, Lucas (LBNL, Berkeley) ; Arbelaez, Diego (LBNL, Berkeley) ; Auchmann, Bernhard (PSI, Villigen ; CERN) ; Bortot, Lorenzo (CERN) ; Stubberud, Edvard (CERN)
Dynamic simulation of superconducting magnets is critical for the design of quench protection systems to prevent potentially damaging temperatures and high voltage from developing after magnet quench. Modeling these scenarios is challenging due to the many multiscale phenomena which impact magnet behavior. [...]
2019 - 12 p. - Published in : Supercond. Sci. Technol. 32 (2019) 095011

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2019-08-17
09:04
Modelling thermodynamics in a high-temperature superconducting dipole magnet: an inverse problem based approach / Ruuskanen, J (Tampere U. of Tech.) ; Stenvall, A (Tampere U. of Tech.) ; Lahtinen, V (Tampere U. of Tech.) ; van Nugteren, J (CERN) ; Kirby, G (CERN) ; Murtomäki, J (Tampere U. of Tech.)
The use of practical high temperature superconductors (HTS), REBCO tapes especially, in magnet applications has become possible thanks to the increasing interest of manufacturers. One difficulty has been the nonlinear material properties that are challenging to measure and model. [...]
2019 - 11 p. - Published in : Supercond. Sci. Technol. 32 (2019) 094007

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2019-08-17
09:04
Hyperfine interactions and diffusion of Cd in TiO$_{2}$ (rutile) / Zyabkin, Dmitry V (Ilmenau Tech. U. ; Palacky U.) ; Schell, Juliana (Duisburg-Essen U. ; CERN) ; Gaertner, Daniel (Munster U.) ; Dang, Thanh T (Bonn U.) ; Gonçalves, João N (Aveiro U.) ; Marschick, Georg (TU Vienna) ; Schaaf, Peter (Ilmenau Tech. U.)
In the current work, we present an investigation of the electronic and defect structure in (TiO$_{2}$) rutile monocrystals by virtue of time differential perturbed angular $\gamma$ - $\gamma$ correlation spectroscopy. Studies were performed using $^{111m}$Cd, implanted at ISOLDE/CERN complemented with diffusion studies and density functional theory calculations. [...]
2019 - Published in : J. Appl. Phys. 126 (2019) 015102

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2019-08-16
06:43
Summary of the Mechanical Performances of the 1.5 m Long Models of the Nb$^3$Sn Low-$\beta$ Quadrupole MQXF / Vallone, Giorgio (LBL, Berkeley) ; Ambrosio, Giorgio (Fermilab) ; Anderssen, Eric C (LBL, Berkeley) ; Bajas, Hugo (CERN) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Chlachidze, Guram (Fermilab) ; Ferracin, Paolo (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) et al.
The Nb3Sn quadrupole MQXF is being developed as a part of the LHC High Luminosity upgrade. [...]
FERMILAB-PUB-19-052-TD. - 2019. - 5 p.
FERMILABPUB - Fulltext

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2019-08-15
09:16
A Multigap Resistive Plate Chamber built with thin low-resistive glass: High rate capability with excellent time resolution / Liu, Z (CERN ; World Lab., Geneva) ; Williams, M C S (CERN ; Gangneung-Wonju Natl. U. ; INFN, Bologna ; Bologna U.) ; Zichichi, A (CERN ; INFN, Bologna ; Bologna U. ; Enrico Fermi Ctr., Rome) ; Zuyeuski, R (World Lab., Geneva ; Enrico Fermi Ctr., Rome)
Two Multigap Resistive Plate Chambers (MRPCs) were built with thin (0.4 mm) low-resistive glass sheets for the inner plates and standard 0.28 mm ‘soda lime’ float glass as external plates. The 6-gap MRPC reaches 96.5% efficiency at 15.6 kV and a time resolution of 68 ps at an instantaneous particle flux around 2.5 kHz/cm 2 . [...]
2019 - 6 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 928 (2019) 7-12 Fulltext from Publisher: PDF;

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2019-08-15
09:16
Timing performance study of Multigap Resistive Plate Chamber with different gap size / Liu, Z (CERN ; U. South China, Hengyang ; World Lab., Geneva) ; Carnesecchi, F (INFN, Bologna ; Bologna U. ; Enrico Fermi Ctr., Rome) ; Williams, M C S (CERN ; Bologna U. ; INFN, Bologna ; Gangneung-Wonju Natl. U.) ; Zichichi, A (CERN ; INFN, Bologna ; Bologna U. ; Enrico Fermi Ctr., Rome) ; Zuyeuski, R (World Lab., Geneva ; Enrico Fermi Ctr., Rome)
This paper reports on the results of time resolution measurements of Multigap Resistive Plate Chamber (MRPC). Three 20 gas gaps MRPCs were built with thin float glass sheets and different gap sizes: 160μm , 140μm and 120μm . [...]
2019 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 927 (2019) 396-400 Fulltext from Publisher: PDF;

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2019-08-15
09:16
Comparison of small collection electrode CMOS pixel sensors with partial and full lateral depletion of the high-resistivity epitaxial layer / Dannheim, Dominik (CERN) ; Fiergolski, Adrian (CERN) ; van Hoorne, Jacobus (CERN) ; Hynds, Daniel (CERN ; Nikhef, Amsterdam) ; Klempt, Wolfgang (CERN) ; Kugathasan, Thanushan (CERN) ; Munker, Magdalena (CERN) ; Nürnberg, Andreas (CERN ; KIT, Karlsruhe) ; Sielewicz, Krzysztof (CERN) ; Snoeys, Walter (CERN) et al.
Large area silicon pixel trackers are currently under development for the High Luminosity upgrade of the LHC detectors. They are also foreseen for the detectors proposed for the future high energy Compact Linear Collider CLIC. [...]
2019 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 927 (2019) 187-193 Fulltext from Publisher: PDF;

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2019-08-15
09:16
Collimation-induced experimental background studies at the CERN Large Hadron Collider / Bruce, R (CERN) ; Huhtinen, M (CERN) ; Manousos, A (CERN ; Innsbruck U. ; Aristotle U., Thessaloniki) ; Cerutti, F (CERN) ; Esposito, L (CERN) ; Kwee-Hinzmann, R (Royal Holloway, U. of London) ; Lechner, A (CERN) ; Mereghetti, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) et al.
The data produced at the particle physics experiments at the Large Hadron Collider (LHC) contain not only the signals from the collisions, but also a background component from proton losses around the accelerator. Understanding, identifying and possibly mitigating this machine-induced background is essential for an efficient data taking, especially for some new physics searches. [...]
2019 - 18 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 021004 Fulltext from Publisher: PDF;

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2019-08-15
09:16
Beam-based alignment of the SuperKEKB linac quadrupoles / Ogur, S (Bogazici U. ; CERN) ; Iida, N (KEK, Tsukuba) ; Kamitani, T (KEK, Tsukuba) ; Oide, K (CERN ; KEK, Tsukuba) ; Zimmermann, F (CERN)
The positron linac of SuperKEKB contains accelerating structures surrounded by quadrupoles without nearby beam-position-monitors (BPMs) or steering magnets. In this situation, standard techniques for beam steering or beam-based-alignment are not efficient. [...]
2019 - 13 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 925 (2019) 199-211

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2019-08-15
09:16
Exploration of Two Layer Nb$_3$Sn Designs of the Future Circular Collider Main Quadrupoles / Lorin, Clement (Saclay) ; Fleiter, Jerome (CERN) ; Salmi, Tiina (Tampere U. of Tech.) ; Schoerling, Daniel (CERN)
The goal of this study is to propose an alternative FCC quadrupole design where the risk from both their fabrication and their operation in the machine is reduced compared to previous analysis. Therefore, the number of coil layers has been reduced from four to two and the load-line margin has been increased from 14% to 20% compared to previous investigations (“Design of a Nb3Sn 400 T/m quadrupole for the future circular collider,” IEEE Trans. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4001005

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