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Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC

In order to predict the irradiation effects in the quadrupoles of the High-Luminosity Large Hadron Collider accelerator at the European Organization for Nuclear Research (CERN) during operation up to a luminosity of 4000 fb^-1, an irradiation program was carried out on industrial Taand Ti-added Nb$_...

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Autores principales: Spina, T, Scheuerlein, C, Richter, D, Ballarino, A, Cerutti, F, Esposito, L S, Lechner, A, Bottura, L, Flükiger, R
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1109/TASC.2016.2549858
http://cds.cern.ch/record/2243552
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author Spina, T
Scheuerlein, C
Richter, D
Ballarino, A
Cerutti, F
Esposito, L S
Lechner, A
Bottura, L
Flükiger, R
author_facet Spina, T
Scheuerlein, C
Richter, D
Ballarino, A
Cerutti, F
Esposito, L S
Lechner, A
Bottura, L
Flükiger, R
author_sort Spina, T
collection CERN
description In order to predict the irradiation effects in the quadrupoles of the High-Luminosity Large Hadron Collider accelerator at the European Organization for Nuclear Research (CERN) during operation up to a luminosity of 4000 fb^-1, an irradiation program was carried out on industrial Taand Ti-added Nb$_{3}$Sn wires. Wire samples from the same batch were irradiated with high-energy protons (65 MeV and 24 GeV, up to 1.4×10^21 m^-2) and neutrons (> 0.1 MeV, up to 1.8×10^22 m^-2). The values of T' and Jc were reported as a function of particle fluence. After replacing the fluence by the number of displacements per atom (dpa), which is determined using the FLUKA code, it was found that the variation of T_c in Nb_3Sn wires as a function of the dpa value for both proton and neutron irradiation falls on the same curve, reflecting a universal behavior. This result reflects the fact that the variation of T_c is uniquely governed by the change in atomic ordering S. Both the measured value T_c and the calculated one dpa essentially depend on the number of Frenkel defects. With the new relationship between T_c and dpa for both protons and neutrons, the decrease of T_c in the quadrupoles at the maximum luminosity can be estimated to ~0.3 K. The variation of J_c versus dpa shows some similarities between proton and neutron irradiation, too, but the analysis is more complex, the observed enhancement of J_c with irradiation being due to enhanced point pinning caused by the radiation-induced defect clusters.
id oai-inspirehep.net-1479347
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
record_format invenio
spelling oai-inspirehep.net-14793472019-09-30T06:29:59Zdoi:10.1109/TASC.2016.2549858http://cds.cern.ch/record/2243552engSpina, TScheuerlein, CRichter, DBallarino, ACerutti, FEsposito, L SLechner, ABottura, LFlükiger, RCorrelation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHCAccelerators and Storage RingsIn order to predict the irradiation effects in the quadrupoles of the High-Luminosity Large Hadron Collider accelerator at the European Organization for Nuclear Research (CERN) during operation up to a luminosity of 4000 fb^-1, an irradiation program was carried out on industrial Taand Ti-added Nb$_{3}$Sn wires. Wire samples from the same batch were irradiated with high-energy protons (65 MeV and 24 GeV, up to 1.4×10^21 m^-2) and neutrons (> 0.1 MeV, up to 1.8×10^22 m^-2). The values of T' and Jc were reported as a function of particle fluence. After replacing the fluence by the number of displacements per atom (dpa), which is determined using the FLUKA code, it was found that the variation of T_c in Nb_3Sn wires as a function of the dpa value for both proton and neutron irradiation falls on the same curve, reflecting a universal behavior. This result reflects the fact that the variation of T_c is uniquely governed by the change in atomic ordering S. Both the measured value T_c and the calculated one dpa essentially depend on the number of Frenkel defects. With the new relationship between T_c and dpa for both protons and neutrons, the decrease of T_c in the quadrupoles at the maximum luminosity can be estimated to ~0.3 K. The variation of J_c versus dpa shows some similarities between proton and neutron irradiation, too, but the analysis is more complex, the observed enhancement of J_c with irradiation being due to enhanced point pinning caused by the radiation-induced defect clusters.oai:inspirehep.net:14793472016
spellingShingle Accelerators and Storage Rings
Spina, T
Scheuerlein, C
Richter, D
Ballarino, A
Cerutti, F
Esposito, L S
Lechner, A
Bottura, L
Flükiger, R
Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC
title Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC
title_full Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC
title_fullStr Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC
title_full_unstemmed Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC
title_short Correlation Between the Number of Displacements Per Atom and $T_c$ After High-Energy Irradiations of Nb$_3$Sn Wires for the HL-LHC
title_sort correlation between the number of displacements per atom and $t_c$ after high-energy irradiations of nb$_3$sn wires for the hl-lhc
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1109/TASC.2016.2549858
http://cds.cern.ch/record/2243552
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