Postdoc: Study of technological solutions for the design of a fast high-voltage generator in “solid state” technology

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Postdoc: Study of technological solutions for the design of a fast high-voltage generator in “solid state” technology

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Offer DescriptionContext:The technology of solid-state electronic and electrotechnical components has been based since the mid-20th century on major developments associated with microelectronic technologies. This revolution has led to the development of extremely complex components, with integration densities reaching several tens of billions of logical components per cm2, thus making it possible to exponentially increase the calculation capacities of the processors of large computers, but also to introduce into everyday life. These developments have also enabled the introduction of technologies dedicated to the generation, switching and supply of electrical power, making it possible today to control complex electrical systems (cars, trains, planes, satellites, systems for high-level energies physics, power lasers, etc.).In this context, the theme of High Power Pulsed Electrotechnics (HPP) represents a specific field having a large number of applications for the benefit of installations whose objective is to experimentally simulate various operational constraints: electromagnetic wave, radiative environment, mechanical deformations, flash radiography, etc. These areas represent one of the major pillars of the expertise of the CEA, in particular of the Military Applications Department. However, to date, few developments of HPP demonstrators based on so-called solid state component technology have been carried out by the CEA. Several government (Lawrence Livermore National Laboratory -LLNL-, Institute of Saint Louis, etc.), academic (SIAME, Technological University of Eindhoven, Univ. Tomsk) and industrial (Montena Technology, ITOPP, ABB) players are interested in this technology particularly promising in particular for its reproducibility performance or even repetition frequency. Recent technological developments have also made it possible to further increase its range of applications through the use of SiC or GaN technologies which have reached a maturity compatible with industrial applications. The example of the Scorpius project led by the LLNL for the design, construction and implementation of a multi-pulse flash radiography installation based entirely on this technology constitutes an emblematic project. This is why, carrying out collaborative studies between the CEA Gramat, the CEA CESTA and the SIAME Laboratory of the University of Pau and Pays de l’Adour within the framework of the LRC SAGE, represents an opportunity to collectively improve skills by exploring this innovative theme.Objectives:The long-term objective of this study would be to achieve the design of a pulsed high-voltage generator (tens of kV) with a rapid rise front (one nanosecond), reduced width at half-height, and high repetition frequency. (approx. 100 Hz). Accumulating all of these performances represents an ambitious scientific and technical challenge. This first study will therefore aim to identify the main obstacles and propose solutions to overcome them.The envisaged application for this pulsed high-voltage source would be the power supply of Non Linear Transmission Line (“Non Linear Transmission Line – NLTL”). For this, the expected specifications are, a “square” pulse with a plateau amplitude of 30 kV with a rise time of less than 2 ns, a width at half maximum of 5 ns and a repetition frequency of 100 Hz, on a load impedance of 50 Ω.Activities:To successfully complete this study, the candidate must: * Carry out a bibliographic study of the components and technologies compatible with the design of a fast and repetitive pulsed high-voltage generator.

• Conduct a feasibility study to propose a proof of concept.
• Design, simulate and produce each technological brick constituting such a prototype generator:
• Storage, switching and transport of energy, triggering and overall control of the means.
• Circuit design.
• Electro-mechanical interface with the load.
• Proceed with the assembly of the generator and compare the experimental results with numerical simulations in order to propose optimizations if necessary.
• Propose conclusions on the main obstacles encountered and resolved, and establish prospects for improvement or adaptation of the main technological blocks developed.

Additional information:The candidate will be integrated into the team of the High Voltage Processes (PHT) of the laboratory for Applied Sciences in Mechanics and Electrical Engineering (SIAME) of the University of Pau and Pays de l’Adour in France.This Laboratory is one of the four entities which constitute the LRC SAGE (Joint Research Laboratory for Applied Sciences in Electrical Engineering) composed of around thirty researchers or teacher-researchers also belonging to the CEA Gramat, CEA CESTA and the CEA Valduc. These teams have been carrying out joint research work in the field of High Pulsed Power (HPP) for many years, as part of collaborative projects.The proposed position is a postdoc which will last for one year. It will be possibly extended for an additional year depending on the results obtained.The salary will be defined according to the CEA’s remuneration.To apply:Send to Charly SIGOGNE ( ) a curriculum vitae, an article published by the candidate relating to the research to be carried out as part of this postdoctoral position and a cover letter. These documents must be sent before 04/30/2024.RequirementsResearch Field Engineering » Electrical engineering Education Level PhD or equivalentLanguages ENGLISH Level GoodLanguages FRENCH Level GoodResearch Field Engineering » Electrical engineering Years of Research Experience 1 – 4Additional InformationWebsite for additional job detailsWork Location(s)Number of offers available 1 Company/Institute SIAME Laboratory Country France City PAU Postal Code 64000 Street Avenue de l’Université GeofieldWhere to apply E-mailcharly.sigogne@univ-pau.frSTATUS: EXPIRED

Expected salary

Location

Pau, Pyrénées-Atlantiques

Job date

Thu, 28 Mar 2024 01:29:00 GMT

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