Scientific direction Development of key enabling technologies
Transfer of knowledge to industry

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Wireless power transmission for remotely controllable micro-robots for biomedical applications

Département Systèmes (LETI)

Laboratoire Autonomie et Intégration des Capteurs

01-01-2021

PsD-DRT-21-0004

nicolas.garraud@cea.fr

Technologies pour la santé et l'environnement, dispositifs médicaux (.pdf)

This project is part of the development of remotely controllable micro-robots for non-invasive surgery of the future. One of the main technological challenges limiting the integration of sensors and actuators is the lack of on-board energy. The project consists of developing a wireless power transmission technology while maintaining control of the robot's spatial position. The first step will be to demonstrate the feasibility of transmitting high power while manipulating the robot in three dimensions. The system comprising a magnetic coil platform and the magnetic robot will be modelled (analytical modelling, finite element simulation, etc.) in order to assess the influence of the main parameters and the limits of the technology and compare them with the literature. After the system dimensioning, it will be fabricated and assembled by integrating the magnetic platform, the power system, the control and the graphical interfaces to achieve a first demonstrator with a basic robot. The second step will consist in demonstrating the remote power supply of sensor-actuator functions that are of interest for biomedical applications. Different sensors and actuators will be integrated with their electronics, and these functions will be demonstrated in a representative environment. The post-doctoral student will be in charge of the technical realisation of the project and will be a source of innovative solutions. He (she) will be able to rely on a team of experts, as well as on the electronics and mechatronics engineers of the laboratory for the realisation of the system. It is expected that the post-doctoral student will promote his/her work through scientific publications, patent applications and participation at conferences.

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Optimization of hybrid energetic naval propulsion

DPLOIRE (CTReg)

Autre DPLOIRE

01-01-2021

PsD-DRT-21-0006

florian.dupriez-robin@cea.fr

Solutions avancées pour l'hydrogène et les piles à combustible pour la transition énergétique (.pdf)

This Postdoc focuses on the development of a methodology and a digital tool for defining, sizing and optimizing hybrid energy chains dedicated to ships. In addition to the energy needs on a dynamic operational profile, it must take into account the constraints inherent in the integration of a propulsion system and the storage of electrical energy and / or associated fuel: availability of power as a function of the sea state, vessel stability, exploitable masses and volumes on board, regulations, supply strategy? A bibliographic analysis will initially allow us to synthesize the needs; criteria and constraints take into account in the tool to optimize the step of defining and sizing the energy chain. This will result in a level of representativeness and a methodology necessary for the modeling of all the components and the simulation of a ship "from the tank to the propeller". The tool should therefore make it possible to integrate advanced energy optimization strategies that go beyond a heuristic approach. Once the problem and the objective function have been formalized, the tool should allow a multi-objective optimization of the architecture and sizing of the energy chain on a set of configurable criteria and constraints: consumption, polluting emissions, maneuverability, storage capacity on board? the methodology are evaluated on two use cases, which will be defined at the start of the project.

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IMPROVING OPTICALLY PUMPED MAGNETOMETERS FOR BIOMEDICAL IMAGING

Département Systèmes (LETI)

Laboratoire Magnétométrie et Tests Electroniques

01-01-2020

PsD-DRT-20-0007

agustin.palacioslaloy@cea.fr

Our lab works on optically pumped magnetometers (OPM) based on helium-4 metastable atoms. Our main achievement in last years has been the design and space qualification of the most advanced OPMs available for spatial exploration, which were launched on ESA Swarm mission [1]. With this very same species we have developed OPMs for medical imaging of brain (MEG) and heart (MCG), which have the advantage of operating at room temperature. The development of these two imaging techniques is an opportunity to better understand and diagnose pathologies like epilepsy, Alzheimer or arrhythmia. A few years ago we performed proof of concept measurements of both MCG and MEG with primitive versions of our sensors [2,3]. After getting a better understanding of our sensors physics [4] and implementing substantial improvements, we are now developing arrays of OPMs and collaborating with several clinical teams in order to test them for different applications and environments. The purpose of this post-doctoral position is to contribute to the development of magnetometer arrays. It involves experimental work to improve the current prototypes of medical OPM arrays: the post-doc will be notably in charge of improving the intrinsic noise of the sensor and identifying the best way to build robust, reproducible architectures that could be replicated in arrays of several hundreds of sensors. This work is aimed at bringing this technology to the medical imaging market, in collaboration with a start-up currently prepared by CEA-Leti. It will be carried out in a multidisciplinary team, composed of researchers, experienced engineers, PhD students and post-docs, specialized in the fields of optics, lasers, magnetism and electronics. It will also rely on collaborations with medical research teams in neurology and cardiology. [1] http://smsc.cnes.fr/SWARM [2] S. Morales et al., [3] E. Labyt et al., IEEE Transactions on Medical Imaging (2019). [4] F. Beato et al. Physical Review A (2018)

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LAB AND FIELD WORK ON OPTICALLY PUMPED MAGNETOMETERS

Département Systèmes (LETI)

Laboratoire Magnétométrie et Tests Electroniques

01-01-2020

PsD-DRT-20-0009

agustin.palacioslaloy@cea.fr

Our lab works on optically pumped magnetometers (OPM) based on helium-4 metastable atoms. Our main achievement in last years has been the design and space qualification of the most advanced OPMs available for spatial exploration, launched on ESA Swarm mission [1]. With this same species we have developed OPMs for medical imaging of brain (MEG) and heart (MCG), which have the advantage of operating at room temperature, with no heating or cooling. The development of these two imaging techniques is an opportunity to better understand and diagnose pathologies like epilepsy, Alzheimer or arrhythmia. A few years ago we performed proof of concept measurements of both MCG and MEG with primitive versions of our sensors [2,3]. After getting a better understanding of our sensors physics [4] and implementing substantial improvements, we are now developing arrays of OPMs and collaborating with several clinical teams in order to test them for different applications and environments. The purpose of this post-doctoral position is to contribute to the development of magnetometer arrays. It involves mainly the deployment of OPM arrays in the clinical environments where they are going to be tested by several of our partner medical research teams in both neurology and cardiology. The post-doc should be able to deploy and operate the sensors in these environments, solve the practical issues, and bring feedback on all kind of improvements that are needed. He or she will also participate in the implementation of some of these improvements, and their tests in lab environment. This work is aimed at bringing this technology to the medical imaging market. It will be carried out in a multidisciplinary team, composed of researchers and experienced engineers. [1] http://smsc.cnes.fr/SWARM [2] S. Morales et al., Phys. Med. B [3] E. Labyt et al., IEEE Transactions on Medical Imaging (2019). [4] F. Beato et al. Physical Review A (2018)

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Advanced tandem time of flight mass spectrometry for micro and nanotechnologies

Département des Plateformes Technologiques (LETI)

Laboratoire Analyses de Surfaces et Interfaces

01-12-2020

PsD-DRT-21-0011

jean-paul.barnes@cea.fr

Nano-caractérisation avancée (.pdf)

The CEA LETI seeks to recruit a post-doctoral researcher to work on the development of advanced time of flight secondary ion mass spectrometry applications (TOF-SIMS). The candidate will work on a new TOF-SIMS instrument equipped with tandem MS spectrometry, in-situ FIB and Argon cluster sputtering. The research project will be focused around the following topics - Developing methods to correlate TOF-SIMS with AFM, XPS and Auger - Improving the sensitivity and efficiency of fragmention of the tandem MS spectrometer - Developing 3D FIB-TOF-SIMS applications and improving the spatial resolution. The candidate will also have access to the wide range of state of the art instruments present on the nanocharacterisation platform as well as bespoke samples coming from the advanced technology branches developed at the LETI. The candidate will also benefit from a collaboration with the instrument supplier.

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Assessment of the activation induced in accelerators used for radionuclides production for medical applications, allowing the optimization of their dismantling

Département Métrologie Instrumentation et Information (LIST)

Laboratoire de Métrologie de la Dose

01-01-2021

PsD-DRT-21-0012

jean.gouriou@cea.fr

The radioactivity induced by activation in facilities using particle accelerators for medical applications leads to the creation of radioactive waste. The precise characterization of activated parts is essential for the dismantling operations of these facilities in order to identify the correct storage and recycling methods of the generated radioactive wastes. In France, the LNHB, as part of the CEA and as designated metrology laboratory by the LNE, for the ionising radiation, has recently started being involved in the estimation of the activation induced in accelerators used for radionuclides production for medical applications, mainly cyclotrons, in order to optimize their dismantling. Taking into account the increasing number of active facilities reaching the end of their life, the safety authorities and bodies in charge of waste management are closely interested in aspects related to the characterization of the generated wastes. This task must be performed with the best possible precision in terms of level of activation and identification of radioisotopes created by activation. The final goal is to identify appropriate actions for the management of these wastes. The subject of this study aims to meet this demand. The main steps planned within the framework of this project are : (1) modelling through Monte Carlo methods the geometry of a particle accelerator used for the production of medical radioisotopes ; (2) characterization of the neutron field produced during operation of this facility ; (3) characterization of radioactivity induced by the accelerated particles of primary beams and secondary neutrons in various materials, composing the activated parts of the accelerator ; (4) use of the results of the previous two steps for an accurate determination of the full radiological spectrum (i.e. the list of the main radioisotopes contributing to induced radioactivity) of each part of the accelerator.

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