A5023645482- Superconducting Materials and Applications
- Advanced MRI Techniques and Applications
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Quantum, superfluid, helium dynamics
- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Particle Accelerators and Free-Electron Lasers
- High-Energy Particle Collisions Research
- Distributed and Parallel Computing Systems
- Magnetic Properties of Alloys
- Calibration and Measurement Techniques
- Dark Matter and Cosmic Phenomena
- Social Sciences and Governance
- Radiation Detection and Scintillator Technologies
- Optical Coatings and Gratings
- Electric Motor Design and Analysis
- Astronomical Observations and Instrumentation
- Fuzzy Logic and Control Systems
- Spacecraft and Cryogenic Technologies
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2010-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2013-2024
CEA Paris-Saclay
2006-2024
Université Paris-Saclay
2023
Institut National de Physique Nucléaire et de Physique des Particules
2003-2006
Centre National de la Recherche Scientifique
2003-2006
Laboratoire d’Annecy de Physique des Particules
2003-2006
CEA Paris-Saclay - Etablissement de Saclay
2003
University of Hassan II Casablanca
2000
Abstract Objective To assess the possible influence of third-order shim coils on behavior gradient field and in gradient–magnet interactions at 7 T above. Materials methods Gradient impulse response function measurements were performed 5 sites spanning strengths from to 11.7 T, all them sharing same exact whole-body coil design. Mechanical fixation boundary conditions altered several ways one site study impact mechanical coupling with magnet perturbations. Vibrations, power deposition He...
A Whole Body 11.7 T MRI Magnet is presently being developed at the CEA Saclay for Iseult/Inumac project, a French-German initiative focused on very-high-magnetic-field molecular imaging to improve sensitivity, spatial, temporal, and spectral resolution preclinical and/or clinical MR systems. The magnet will be installed Neurospin center, Saclay, in 2012. This actively shielded system, with stored energy of 338 MJ an inductance 308 H, has external dimensions 5 m diameter 5.2 length. operate...
The Iseult project is a French-German initiative focused on very high magnetic-field molecular imaging. includes Whole Body 11.7 T MRI magnet installed at Neurospin, neuroscience research center operating CEA Saclay since November 2006. After 7 years of fabrication Belfort by GE Power (Ex Alstom), the was delivered to in June 2017, its connection with cryoplant and all ancillary equipment completed October 2018. 4 months cooldown another tests, reached nominal field 11.72 without any quench...
Neurospin, a neuroscience research centre with very high field MRI equipments, just opened in November 2006 at Saclay by the CEA life science division. One of imaging systems will require an 11.7 T magnet 900 mm warm bore. This is currently under development Saclay, collaboration Siemens Medical Solutions and Alstom Magnets Superconductors, within framework French-German consortium Iseult/INUMAC (Imaging Neuro disease Using field. MAgnetic resonance Contrastophores). The main aim to promote...
A neuroscience research center with very high field MRI equipments has been opened in November 2006 by the CEA life science division. One of imaging systems will require a 11.75 T magnet 900 mm warm bore. Regarding large aperture and strength, this is real challenge when compared to largest ever built, it being developed within an ambitious R&D program, Iseult, focused on MRI. The conservative design principles are not readily applicable, other concepts taken from energy physics or fusion...
As part of the Iseult/Inumac project, development a 500 MHz whole body MRI magnet has been launched in 2006. This with central field 11.7 T warm bore 900 mm outstanding specifications respect to usual systems. The normal operation this will need construction cryoplant able cool its superconducting coils pressurized HeII 1.8 K. A helium liquefier and 4.2 K/1.8 K refrigeration stage be installed vicinity magnet. Before that, test facility (Seht-¿station d'essais huit teslas¿) at CEA/Saclay...
As part the Iseult/Inumac project, a French-German initiative focused on very high magnetic-field molecular imaging, Whole Body 11.7 T MRI Magnet currently under development is world's largest to-date. It an actively shielded magnet system, manufactured from NbTi superconductor, with homogeneous field level of 11.75 within 90 cm warm bore. will operate at current 1483 A, in nonpersistent mode, bath superfluid LHe 1.8 K. The stored energy 338 MJ and inductance 308 H. cryostat has external...
A new innovative whole body 11.7 T MRI magnet is currently being manufactured at Belfort as part of the Iseult/Inumac project, a French-German initiative focused on very high magnetic-field molecular imaging. It will be installed in neuroscience research center with other field equipment, operating France CEA Saclay since November 2006. This actively shielded system, from an NbTi superconductor, generate homogeneous level 11.75 within 90-cm warm bore. The design was cross checked and...
A new innovative Whole Body 11.7 T MRI magnet is currently being manufactured at Alstom Belfort as part of the Iseult/Inumac project, a French-German initiative focused on very high magnetic-field molecular imaging. It will be installed in 2015 neuroscience research center with other field equipment, operating France CEA Saclay since November 2006. This actively shielded system, from NbTi superconductor, generate homogeneous level 11.75 within 90 cm warm bore, and operate current 1483 A,...
Neurospin is a neuroscience research center located in France at the Atomic Energy Commission (CEA Saclay). The facility hosting an innovative whole-body 11.7 T MRI system that has delivered its first images October 2021. core part of Iseult actively shielded NbTi magnet cooled with pressurized superfluid helium bath 0.125 MPa and 1.8 K, providing homogeneous magnetic field within 90 cm warm bore. After nearly twenty years work efforts, successfully reached nominal for time July 2019....
Quench experiments were performed in the CEA Saclay facility on Seht superconducting magnet. The is part of Iseult R&D program. an 8-T coil wound sixty double pancakes using NbTi conductor. cooled by steady state superfluid helium at 1.8 K and 1.2 bar. Instrumentation, inside bath, includes voltage taps, pressure temperature sensors, as well flow meters. major issues will be addressed here: normal zone propagation during quench rise helium.
A new innovative Whole Body 11.7-T MRI magnet is currently being manufactured at Alstom Belfort as part of the Iseult/Inumac project. It will be installed in 2016 a neuroscience research center with other very-high-field equipment, operating France CEA Saclay. The has external dimensions 5 m diameter and length, stored magnetic energy 338 MJ. operate homogeneous field level 11.75 T within 90-cm warm bore current 1483 driven mode. cryoplant connected to magnet, it provides pressurized Helium...
The Whole Body 11.7 T MRI Magnet is an actively shielded magnet system, with a stored energy of 338 MJ and inductance 308 H. Operating at homogeneous field level 11.75 within 90 cm warm bore, the cryostat has external dimensions 4.8 m in diameter 5.0 length. It part Iseult/Inumac project, French-German initiative focused on very-high-magnetic-field molecular imaging to improve sensitivity, spatial, temporal, spectral resolution for preclinical and/or clinical MR systems. After qualification...
JT-60SA is a fusion experiment, which jointly constructed by Japan and Europe shall contribute to the early realization of energy, providing support operation ITER addressing key physics issues for DEMO. The 18 superconducting toroidal field (TF) coils device will be provided European laboratories ENEA CEA tested in cold test facility (CTF) at Saclay. cooled with supercritical helium nominal current 25.7 kA, temperatures between 5 7.5 K, check temperature margin against quench. main...
The Iseult project started in 2001 and is a collaborative effort involving CEA the University of Freiburg academics, Guerbet, Siemens Healthineers Bruker Biospin as industrial partners. One central aspect has been design by whole-body magnet 11.7T field strength with 90-cm wide bore. After nearly 20 years research development, prototyping, integration tests, first images have acquired this unique MRI scanner. Some key validation results are presented here.
The Iseult/Inumac project is a French–German initiative focused on very high magnetic-field molecular imaging. That includes Whole Body 11.7 T MRI magnet that will equip Neurospin, neuroscience research center operating at CEA Saclay since November 2006. After seven years of activities, the fabrication has been successfully completed in Belfort by GE Power. Iseult was delivered to May 2017 and final commissioning started. This paper deals with last manufacturing steps factory tests. An...
Abstract 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 main coil caused rise temperature He bath activity. Predicting power depositions thereby very valuable tool to avoid dangerous frequency zones but also eventually correct design flaws. In this work, we report model predictions compared measurements deposition in Iseult 11.7 T for Z axis.
Motivation: Experimental characterization and understanding of the power deposition in He bath an ultra-high field magnet is important for safety. Goal(s): We report a quasi-analytical model Z gradient axis compare it with measurements. Approach: The was based on three cylinders consisting vessel, cryoshield outer vacuum chamber. Coupled partial differential equations involving both electromagnetism elasticity were derived solved. Results: Our predicts accurately positions cryogenic peaks...
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 SC72 gradient coil using field vibration measurements. Approach: The transfer function was measured at 11.7T (Iseult) 7T (Terra) without connection 3rd coils. Vibration measurements were carried out Iseult from 0 to in two configurations as well. Results: data a drastic their circuits. Impact: work suggests caution...
A new innovative whole-body 11.7-T MRI magnet is currently being manufactured at Alstom Belfort as part the Iseult/Inumac project, a French-German initiative focused on very high magnetic field molecular imaging. It will be installed end of year 2016 in neuroscience research center with other equipment, operating France CEA Saclay since November 2006. The main coil constructed from stack 170 double pancakes 2-m diameter, finished height 4 m and 50 t weight, has been completed within required...
The Iseult whole-body MRI delivered its first images in October 2021. masterpiece of this is an actively shielded NbTi magnet providing a homogeneous magnetic field 11.7 T within 90 cm warm bore. A dedicated cryoplant was constructed to cool the at 1.8 K using superfluid helium bath and it nominal operation since March 2019. This paper will present design, as well connection cryogenic ancillary equipment with magnet. Estimated thermal losses be compared experimental data collected beginning...