M. Juchno
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View article: Fabrication and Test of C3a: A Six-Layer Subscale Canted $\cos \theta$ Dipole Magnet Using High-Temperature Superconducting corc Wires
Fabrication and Test of C3a: A Six-Layer Subscale Canted $\cos \theta$ Dipole Magnet Using High-Temperature Superconducting corc Wires Open
REBCO coated conductors have a strong potential for high-field magnet applications. The REBCO technology, however, is still in its infancy for accelerator magnet applications. As part of the U.S. Magnet Development Program, we developed a …
View article: Conceptual Design of 20 T Hybrid Accelerator Dipole Magnets
Conceptual Design of 20 T Hybrid Accelerator Dipole Magnets Open
Hybrid magnets are currently under consideration as an economically viable option towards 20 T dipole magnets for next generation of particle accelerators. In these magnets, High Temperature Superconducting (HTS) materials are used in the …
View article: An Initial Look at the Magnetic Design of a 150 mm Aperture High-Temperature Superconducting Magnet With a Dipole Field of 8 to 10 T
An Initial Look at the Magnetic Design of a 150 mm Aperture High-Temperature Superconducting Magnet With a Dipole Field of 8 to 10 T Open
High-temperature superconducting REBa2 Cu3O7-$x$ (rebco) conductors have the potential to generate a high magnetic field over a broad temperature range. The corresponding accelerator magnet technology, still in its infancy, can be attracti…
View article: Shell-Based Support Structure for the 45 GHz ECR Ion Source MARS-D
Shell-Based Support Structure for the 45 GHz ECR Ion Source MARS-D Open
Superconducting electron cyclotron resonance ion sources (ECRISs) using NbTi coils and optimized for 28 GHz resonant heating have been successfully operated for almost two decades. Moving to higher heating frequencies requires increased ma…
View article: Towards 20 T Hybrid Accelerator Dipole Magnets
Towards 20 T Hybrid Accelerator Dipole Magnets Open
We report the most effective way to achieve very high collision energies in a circular particle accelerator is to maximize the field strength of the main bending dipoles. In dipole magnets using Nb-Ti superconductor the practical field lim…
View article: Design of CCT6: A Large Aperture, Nb$_3$Sn Dipole Magnet for HTS Insert Testing
Design of CCT6: A Large Aperture, Nb$_3$Sn Dipole Magnet for HTS Insert Testing Open
We present the design of a four-layer, Canted Cosine Theta (CCT) Nb Sn dipole magnet as part of the general R&D program for high field superconducting magnets supported by the US Magnet Development Program (US-MDP). Future testing with Hi…
View article: ATS/STA Transfer Line Design for the ALS Upgrade Project (ALS-U)
ATS/STA Transfer Line Design for the ALS Upgrade Project (ALS-U) Open
At the Advanced Light Source Upgrade (ALS-U), an on-axis swap-out injection will be used to replenish depleted bunches in the storage ring with refreshed bunches from the full energy accumulator ring. To implement this scheme, two transfer…
View article: CERN Yellow Reports: Monographs, Vol. 10 (2020): High-Luminosity Large Hadron Collider (HL-LHC): Technical design report
CERN Yellow Reports: Monographs, Vol. 10 (2020): High-Luminosity Large Hadron Collider (HL-LHC): Technical design report Open
The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up anew energy frontier for exploration in 2010, it has gathered a global user community of about 9000 scientists working in fundamental…
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: Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets
Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets Open
The U.S. Magnet Development Program (MDP) collaboration is designing a utility mechanical structure for testing various high-field superconducting dipole coils. The design uses a shell-based structure concept, which allows applying preload…
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: The 16 T Dipole Development Program for FCC and HE-LHC
The 16 T Dipole Development Program for FCC and HE-LHC Open
A future circular collider (FCC) with a center-of-mass energy of 100 TeV and a circumference of around 100 km, or an energy upgrade of the LHC (HE-LHC) to 27 TeV require bending magnets providing 16 T in a 50-mm aperture. Several developme…
View article: Superconducting ECR ion source: From 24-28 GHz SECRAL to 45 GHz fourth generation ECR
Superconducting ECR ion source: From 24-28 GHz SECRAL to 45 GHz fourth generation ECR Open
The development of superconducting ECR source with higher magnetic fields and higher microwave frequency is the most straight forward path to achieve higher beam intensity and higher charge state performance. SECRAL, a superconducting thir…
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: Quench Protection of a Nb$_3$Sn Superconducting Magnet System for a 45-GHz ECR Ion Source
Quench Protection of a Nb$_3$Sn Superconducting Magnet System for a 45-GHz ECR Ion Source Open
© 2002-2011 IEEE. Lawrence Berkeley National Laboratory in collaboration with the Institute of Modern Physics has developed a Nb3Sn-based superconducting magnet system for a fourth-generation electron cyclotron resonance source, with a go…
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: 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: Status of the 16 T Dipole Development Program for a Future Hadron Collider
Status of the 16 T Dipole Development Program for a Future Hadron Collider Open
© 2017 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. A next step of energy increase of hadron colliders beyond the LHC requires high-field superconducting magnets capable of providing a dipolar…
View article: MQXFS1 Quadrupole Fabrication Report
MQXFS1 Quadrupole Fabrication Report Open
This report presents the fabrication and QC data of MQXFS1, the first short model of the low-beta quadrupoles (MQXF) for the LHC High Luminosity Upgrade. It describes the conductor, the coils, and the structure that make the MQXFS1 magnet.…
View article: Insertion Magnets
Insertion Magnets Open
Chapter 3 in High-Luminosity Large Hadron Collider (HL-LHC) : Preliminary Design Report. The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up a new energy frontier for exploration in 201…
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 Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC
Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC Open
The Large Hadron Collider Luminosity upgrade (HiLumi) program requires new low-β triplet quadrupole magnets, called MQXF, in the interaction region to increase the LHC peak and integrated luminosity. The MQXF magnets, designed and fabricat…
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…
View article: Assembly Tests of the First Nb<sub>3</sub>Sn Low-Beta Quadrupole Short Model for the Hi-Lumi LHC
Assembly Tests of the First Nb<sub>3</sub>Sn Low-Beta Quadrupole Short Model for the Hi-Lumi LHC Open
In preparation for the high-luminosity upgrade of the Large Hadron Collider (LHC), the LHC Accelerator Research Program (LARP) in collaboration with CERN is pursuing the development of MQXF: a 150-mm-aperture high-field Nb 3 Sn quadrupole …
View article: Feed-Forward Corrections for Tune and Chromaticity Injection Decay During 2015 LHC Operation
Feed-Forward Corrections for Tune and Chromaticity Injection Decay During 2015 LHC Operation Open
After two years of shutdown, the Large Hadron Collider (LHC) has been operated in 2015 at 6.5 TeV, close to its designed energy. When the current is stable at low field, the harmonic components of the main circuits are subject to a dynamic…
View article: Tune and Chromaticity Control During Snapback and Ramp in 2015 LHC Operation
Tune and Chromaticity Control During Snapback and Ramp in 2015 LHC Operation Open
Because of current redistribution on the superconducting cables, the harmonic components of the magnetic fields of the superconducting magnets in the Large Hadron Collider (LHC) show decay during the low field injection plateau. This resul…
View article: Development of MQXF: The Nb<sub>3</sub>Sn Low-<inline-formula> <tex-math notation="LaTeX">$\beta$</tex-math></inline-formula> Quadrupole for the HiLumi LHC
Development of MQXF: The Nb<sub>3</sub>Sn Low- Quadrupole for the HiLumi LHC Open
The High Luminosity (HiLumi) Large Hadron Collider (LHC) project has, as the main objective, to increase the LHC peak luminosity by a factor five and the integrated luminosity by a factor ten. This goal will be achieved mainly with a new i…
View article: Test Set-Up for the Cooling of Heavy Magnets by Controlled Way Down to 77 K
Test Set-Up for the Cooling of Heavy Magnets by Controlled Way Down to 77 K Open
In the scope of the High Field Magnets work package of the European FP7-EuCARD project, the structure of the future dipole magnet RMC and FRESCA2 has been tested at liquid nitrogen temperature replacing the actual Nb$_{3}$Sn-based coils by…