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View article: Impact of third order shim coils on gradient-magnet interactions and gradient waveform fidelity
Impact of third order shim coils on gradient-magnet interactions and gradient waveform fidelity Open
Motivation: Third order shim coils can impact gradient-magnet interactions with consequences on image quality and magnet safety. Goal(s): To demonstrate the influence of third order shim coils on the SC72 gradient coil using field and vibr…
View article: Measurements of the gradient-induced power deposition in the He-bath of the Iseult 11.7T magnet and comparison with theory
Measurements of the gradient-induced power deposition in the He-bath of the Iseult 11.7T magnet and comparison with theory Open
Motivation: Experimental characterization and understanding of the power deposition in the He bath of an ultra-high field magnet is important for magnet safety. Goal(s): We report a quasi-analytical model for the Z gradient axis power depo…
View article: Power deposition in the He bath induced by the Z gradient coil in the 11.7 T Iseult magnet: theory versus measurements
Power deposition in the He bath induced by the Z gradient coil in the 11.7 T Iseult magnet: theory versus measurements Open
Gradient-magnet interactions increase with higher field magnets and stronger gradient coils. Perhaps the most sensitive aspect is magnet quench, which can be induced by a loss of superconductivity of the main coil caused by a rise of the t…
View article: Commissioning of the Iseult CEA 11.7T Whole-Body MRI: current status, gradient-magnet interaction tests and first imaging experience
Commissioning of the Iseult CEA 11.7T Whole-Body MRI: current status, gradient-magnet interaction tests and first imaging experience Open
Objectives The Iseult MRI is an actively shielded whole-body magnet providing a homogeneous and stable magnetic field of 11.7 T. After nearly 20 years of research and development, the magnet successfully reached its target field strength f…
View article: Updates on CEA Design and Experimental Activities on EU DEMO TF System
Updates on CEA Design and Experimental Activities on EU DEMO TF System Open
In the framework of EU design activities for dimensioning the future fusion DEMOnstration reactor (DEMO), in-depth analyses were conducted in EUROfusion context, aiming to define the design of the DEMO magnets system. For the last DEMO bas…
View article: Progress on the commissioning of the Iseult 11.7T whole-body MRI: first images
Progress on the commissioning of the Iseult 11.7T whole-body MRI: first images Open
Synopsis: The Iseult project started in 2001 and is a collaborative effort involving CEA and the University of Freiburg in academics, Guerbet, Siemens Healthineers and Bruker Biospin as industrial partners. One central aspect of the projec…
View article: Updates on Magnet Design For EU-DEMO Reactor: Optimization Studies on TF and CS Systems
Updates on Magnet Design For EU-DEMO Reactor: Optimization Studies on TF and CS Systems Open
In the framework of EU design activities for dimensioning the future fusion DEMOnstration reactor (DEMO), extensive analyses were conducted in EUROfusion context, aiming at ultimately defining the design of the DEMO magnets system. In this…
View article: CEA Broad Studies on EU DEMO CS and PF Magnet Systems
CEA Broad Studies on EU DEMO CS and PF Magnet Systems Open
In the framework of EU design activities for dimensioning the future fusion DEMOnstration reactor (DEMO), extensive analyses were conducted in EUROfusion context, aiming at ultimately defining the design of the DEMO magnet system. In this …
View article: Advance in the conceptual design of the European DEMO magnet system
Advance in the conceptual design of the European DEMO magnet system Open
The European DEMO, i.e. the demonstration fusion power plant designed in the framework of the Roadmap to Fusion Electricity by the EUROfusion Consortium, is approaching the end of the pre-conceptual design phase, to be accomplished with a …
View article: Experimental and numerical study of the different quench acceleration phenomena in the JT-60SA Toroidal Field coils
Experimental and numerical study of the different quench acceleration phenomena in the JT-60SA Toroidal Field coils Open
JT-60SA is an advanced superconducting fusion Tokamak jointly constructed by Japan and Europe. It takes the main missions of addressing key physics issues and providing direct operation experiences for ITER and DEMO reactors. In the framew…
View article: Status of CEA Magnet Design Tools and Applications to EU DEMO PF and CS Magnets
Status of CEA Magnet Design Tools and Applications to EU DEMO PF and CS Magnets Open
In the framework of the design activities conducted in the EU for dimensioning the future fusion demonstration reactor (DEMO), extensive analyses were carried out within the framework of the EUROfusion consortium, with the objective of def…
View article: Mechanical pre-dimensioning and pre-optimization of the tokamaks’ toroidal coils featuring the winding pack layout
Mechanical pre-dimensioning and pre-optimization of the tokamaks’ toroidal coils featuring the winding pack layout Open
The structural integrity of superconducting magnets that are key elements of a fusion reactor must be ensured. At an early design stage relatively simple calculation tools can greatly facilitate design optimization. The main objective of t…
View article: NectarCAM : a camera for the medium size telescopes of the Cherenkov Telescope Array
NectarCAM : a camera for the medium size telescopes of the Cherenkov Telescope Array Open
NectarCAM is a camera proposed for the medium-sized telescopes of the\nCherenkov Telescope Array (CTA) covering the central energy range of ~100 GeV\nto ~30 TeV. It has a modular design and is based on the NECTAr chip, at the\nheart of whi…
View article: Overview of Progress on the EU DEMO Reactor Magnet System Design
Overview of Progress on the EU DEMO Reactor Magnet System Design Open
The DEMO reactor is expected to be the first application of fusion for electricity generation in the near future. To this aim conceptual design activities are progressing in Europe (EU) under the lead of the EUROfusion Consortium in order …
View article: Approaches to Analyze Structural Issues of the European DEMO Toroidal Field Coil System at an Early Design Stage
Approaches to Analyze Structural Issues of the European DEMO Toroidal Field Coil System at an Early Design Stage Open
Because of its ambitious goals, the DEMO project faces many technical challenges. The mechanical performance of the superconducting toroidal field coil (TFC) system is mostly determined by the high electromagnetic forces. A structural eval…
View article: Cooling Tests of the NectarCAM camera for the Cherenkov Telescope Array
Cooling Tests of the NectarCAM camera for the Cherenkov Telescope Array Open
The NectarCAM is a camera proposed for the medium-sized telescopes in the framework of the Cherenkov Telescope Array (CTA), the next-generation observatory for very-high-energy gamma-ray astronomy. The cameras are designed to operate in an…
View article: NectarCAM : a camera for the medium size telescopes of the Cherenkov Telescope Array
NectarCAM : a camera for the medium size telescopes of the Cherenkov Telescope Array Open
NectarCAM is a camera proposed for the medium-sized telescopes of the Cherenkov Telescope Array (CTA) covering the central energy range of ~100 GeV to ~30 TeV. It has a modular design and is based on the NECTAr chip, at the heart of which …
View article: Experimental identification of the overall elastic rigidities of superconducting windings
Experimental identification of the overall elastic rigidities of superconducting windings Open
This study deals with of the experimental methodology developed in order to identify the elastic properties of superconducting ring-shaped windings. Mechanical tensile tests were conducted on specimens associated to a full-field displaceme…