Nicolas Bourcey
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View article: Construction and Analysis of a Modified Nb<sub>3</sub>Sn 11 T Short Dipole Model
Construction and Analysis of a Modified Nb<sub>3</sub>Sn 11 T Short Dipole Model Open
The 5.2-m-long, 11 T double-aperture Nb3Sn Dipole Magnet was designed to replace some of the standard, 15-m-long 8.3 T Nb–Ti main dipole magnets in the Large Hadron Collider. After the production and test of several of 2-m-long models, the…
View article: Proof-of-Principle of an Energy-Efficient, Iron-Dominated Electromagnet for Physics Experiments
Proof-of-Principle of an Energy-Efficient, Iron-Dominated Electromagnet for Physics Experiments Open
A number of physics experiments call for the use of iron-dominated, normal-conducting electromagnets to produce moderate fields (2 T range) in a large gap or over a large volume. Although robust and reliable, these magnets require signific…
View article: Optimizing the use of pressurized bladders for the assembly of HL-LHC MQXFB magnets
Optimizing the use of pressurized bladders for the assembly of HL-LHC MQXFB magnets Open
The use of pressurized bladders for stress control of superconducting magnets was firstly proposed at Lawrence Berkeley National Laboratory in the early 2000s. Since then, the so-called ‘bladders and keys’ procedure has become one of the r…
View article: Performance of a MQXF Nb<sub>3</sub>Sn Quadrupole Magnet Under Different Stress Level
Performance of a MQXF Nb<sub>3</sub>Sn Quadrupole Magnet Under Different Stress Level Open
In a dipole or in a quadrupole accelerator magnet, the displacement of the coil turns induced by the electromagnetic forces can cause quenches limiting the magnet performance. For this reason, an azimuthal preload is applied to avoid azimu…
View article: Performance of a MQXF Nb3Sn Quadrupole Magnet Under Different Stress Level
Performance of a MQXF Nb3Sn Quadrupole Magnet Under Different Stress Level Open
In a dipole or in a quadrupole accelerator magnet, the displacement of the coil turns induced by the electromagnetic forces can cause quenches limiting the magnet performance. For this reason, an azimuthal preload is applied to avoid azimu…
View article: Progress in the Development of the Nb<sub>3</sub>Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC
Progress in the Development of the Nb<sub>3</sub>Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC Open
The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). With a nominal operating gradient of 132.2 T/m in a 150 mm aperture and…
View article: Mechanical Comparison of Short Models of Nb<sub>3</sub> Sn Low-β Quadrupole for the Hi-Lumi LHC
Mechanical Comparison of Short Models of Nb<sub>3</sub> Sn Low-β Quadrupole for the Hi-Lumi LHC Open
MQXF is the Nb3 Sn Low-β quadrupole magnet that the HL-LHC project is planning to install in the LHC interaction regions in 2026 to increase the LHC integrated luminosity. Furthermore, the magnet will be fabricated in two different lengths…
View article: Mechanical Consolidation of the LHC Inner Triplet Magnet Supporting System for Remote Alignment
Mechanical Consolidation of the LHC Inner Triplet Magnet Supporting System for Remote Alignment Open
Given the high radiation area and the tight alignment tolerances, the LHC inner triplet magnets were designed to be realigned remotely using motorized supporting jacks. However, during run 2 the LHC triplet realignment system started to sh…
View article: Erratum to “The HL-LHC Low-β Quadrupole Magnet MQXF: From Short Models to Long Prototypes” [Aug 19 Art. no. 4001309]
Erratum to “The HL-LHC Low-β Quadrupole Magnet MQXF: From Short Models to Long Prototypes” [Aug 19 Art. no. 4001309] Open
Presents corrections to author information for the above named paper.
View article: Preload Characterization of Short Models of MQXF the Nb<sub>3</sub>Sn Low-β Quadrupole for the Hi-Lumi LHC
Preload Characterization of Short Models of MQXF the Nb<sub>3</sub>Sn Low-β Quadrupole for the Hi-Lumi LHC Open
MQXF is the Nb3Sn Low-β Quadrupole magnet that the HL-LHC project is planning to install in the LHC interaction regions in 2026 as part of an upgrade to increase the LHC inte-grated luminosity by about a factor of ten. The magnet will be f…
View article: Summary of the Mechanical Performances of the 1.5 m Long Models of the Nb<inline-formula> <tex-math notation="LaTeX">$_{3}$</tex-math> </inline-formula>Sn Low-<inline-formula> <tex-math notation="LaTeX">$\beta$</tex-math> </inline-formula> Quadrupole MQXF
Summary of the Mechanical Performances of the 1.5 m Long Models of the NbSn Low- Quadrupole MQXF Open
The Nb3Sn quadrupole MQXF is being developed as a part of the large hadron collide (LHC) High Luminosity upgrade. The magnet design was tested on 1.5-m-long short models, sharing the same cross section with the full-length magnets. Various…
View article: Test Results of the CERN HL-LHC Low-<inline-formula> <tex-math notation="LaTeX">$\beta$</tex-math> </inline-formula> Quadrupole Short Models MQXFS3c and MQXFS4
Test Results of the CERN HL-LHC Low- Quadrupole Short Models MQXFS3c and MQXFS4 Open
For the High Luminosity Upgrade of the CERN Large Hadron Collider, lower * quadrupole magnets based on advanced Nb3Sn conductors will be installed on each side of the ATLAS and CMS experiment insertion zones. As part of the technological d…
View article: The HL-LHC Low-β Quadrupole Magnet MQXF: From Short Models to Long Prototypes
The HL-LHC Low-β Quadrupole Magnet MQXF: From Short Models to Long Prototypes Open
In order to reduce the beam size by a factor two in the inter-action points, and to increase the rate of collisions by a factorof five, the HL-LHC Project [1] is planning to install in the LHC Interaction Regions (IR) new inner triplet (or…
View article: Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-<inline-formula> <tex-math notation="LaTeX">$\beta$</tex-math> </inline-formula> Quadrupole for the High-Luminosity LHC Upgrade
Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low- Quadrupole for the High-Luminosity LHC Upgrade Open
The Nb3Sn low-$β$ quadrupole MQXF is being developed as a part of the High-Luminosity large hadron collider (LHC) upgrade project. The magnet will be produced in two different configurations, sharing the same cross section but with differe…
View article: Test Result of the Short Models MQXFS3 and MQXFS5 for the HL-LHC Upgrade
Test Result of the Short Models MQXFS3 and MQXFS5 for the HL-LHC Upgrade Open
In the framework of the High-Luminosity Large Hadron Collider, the installation of a new generation of quadrupole magnets is foreseen on each side of ATLAS and CMS experiments. The new magnets are based on Nb$_{3}$Sn technology and shall b…
View article: Development of MQYY: A 90-mm NbTi Double Aperture Quadrupole Magnet for HL-LHC
Development of MQYY: A 90-mm NbTi Double Aperture Quadrupole Magnet for HL-LHC Open
In the context of the HL-LHC project, a NbTi double aperture quadrupole magnet called MQYY is being developed. This 90-mm-aperture quadrupole magnet has a magnetic length of 3.67 m and an operating gradient of 120 T/m at 1.9 K. Its develop…
View article: Overview of the Quench Heater Performance for MQXF, the Nb<sub>3</sub>Sn Low-<italic>β</italic> Quadrupole for the High Luminosity LHC
Overview of the Quench Heater Performance for MQXF, the Nb<sub>3</sub>Sn Low-β Quadrupole for the High Luminosity LHC Open
In the framework of the High-Luminosity upgrade of the Large Hadron Collider, the US LARP collaboration and CERN are jointly developing a 150 mm aperture Nb$_{3}$Sn quadrupole for the LHC interaction regions. Due to the large stored energy…
View article: Fabrication and Assembly Performance of the First 4.2 m MQXFA Magnet and Mechanical Model for the Hi-Lumi LHC Upgrade
Fabrication and Assembly Performance of the First 4.2 m MQXFA Magnet and Mechanical Model for the Hi-Lumi LHC Upgrade Open
© 2018 IEEE. The LHC accelerator research program (LARP), in collaboration with CERN and under the scope of the high luminosity upgrade of the Large Hadron Collider, is in the prototyping stage in the development of a 150 mm aperture high-…
View article: Fabrication of the 7.3-m-Long Coils for the Prototype of MQXFB, the Nb3Sn Low-b Quadrupole Magnet for the HiLumi LHC
Fabrication of the 7.3-m-Long Coils for the Prototype of MQXFB, the Nb3Sn Low-b Quadrupole Magnet for the HiLumi LHC Open
The High luminosity LHC upgrade target is to increase the integrated luminosity by a factor 10, resulting in an integrated luminosity of 3000 fb-1. One major improvement foreseen is the reduction of the beam size at the collision points. T…
View article: Mechanical Analysis of the Short Model Magnets for the Nb $_{3}$Sn Low-$\beta$ Quadrupole MQXF
Mechanical Analysis of the Short Model Magnets for the Nb $_{3}$Sn Low-$\beta$ Quadrupole MQXF Open
During the development of MQXF, the new Nb$_{3}$Sn quadrupole to be used in the large hadron collider (LHC) inner triplets for the High Luminosity upgrade, three short models were tested: MQXFS1, MQXFS3, and MQXFS5. These models differ in …
View article: Applied Metrology in the Production of Superconducting Model Magnets for Particle Accelerators
Applied Metrology in the Production of Superconducting Model Magnets for Particle Accelerators Open
The production of superconducting magnets for particle accelerators involves high precision assemblies and tight tolerances, in order to achieve the requirements for their appropriate performance. It is therefore essential to have a strict…
View article: Mechanical Design Analysis of MQXFB, the 7.2-m-Long Low- $\beta$ Quadrupole for the High-Luminosity LHC Upgrade
Mechanical Design Analysis of MQXFB, the 7.2-m-Long Low- $\beta$ Quadrupole for the High-Luminosity LHC Upgrade Open
As part of the High-Luminosity Large Hadron Collider (LHC) Project, a set of Nb3 Sn quadrupoles are being developed, aiming to enhance the performance of the inner triplets. The new magnets, identified as MQXFA and MQXFB, will share the sa…
View article: Mechanical Performance of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the Hi-Lumi LHC
Mechanical Performance of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the Hi-Lumi LHC Open
In the framework of the Hi-Lumi LHC Project, CERN and U.S. LARP are jointly developing MQXF, a 150-mm aperture high-field Nb3Sn quadrupole for the upgrade of the inner triplet of the low-beta interaction regions. The magnet is supported by…
View article: Mechanical Qualification of the Support Structure for MQXF, the Nb<sub>3</sub>Sn Low- <inline-formula> <tex-math notation="LaTeX">$\beta$</tex-math> </inline-formula> Quadrupole for the High Luminosity LHC
Mechanical Qualification of the Support Structure for MQXF, the Nb<sub>3</sub>Sn Low- Quadrupole for the High Luminosity LHC Open
Within the scope of the High Luminosity LHC project, the collaboration between CERN and U.S. LARP is developing new low-β quadrupoles using the Nb3Sn superconducting technology for the upgrade of the LHC interaction regions. The magnet sup…