Digital Phasemeter Based On a System-on-chip for - Marseille, France - CEA - Commissariat à l'Energie Atomique

CEA - Commissariat à l'Energie Atomique
CEA - Commissariat à l'Energie Atomique
Entreprise vérifiée
Marseille, France

il y a 1 mois

Sophie Dupont

Posté par:

Sophie Dupont

beBee Recruiter
Description

Domaine:

Instrumentation, métrologie et contrôle


Contrat:

Stage


Intitulé de l'offre:

Digital phasemeter based on a system-on-chip for measuring plasma electron density using interferometry


Sujet de stage:

"A heterodyne interferometer plays a pivotal role in monitoring and controlling magnetically confined plasma. This technique enables measuring every millisecond the average electron density along where a far-infrared laser beam passes through the plasma. As the probing beam interacts with plasma electrons, it experiences a time delay, dependent on electron density. The primary objective is to measure this phase.

At IRFM, the WEST tokamak employs interferometry diagnostics with a phase-measurement-dedicated electronic device based on the zero-crossing technique.

This device can count interference fringes and comprises controlled amplifiers, ADCs, zero-crossing discriminators, and a programmable logic circuit, similar to the Altera Cyclone III FPGA.

Presently, we are contemplating improvements to this phasemeter concerning metrology and obsolescence. "


Durée du contrat (en mois):
6 months


Description de l'offre:

"The objective of this internship is to make a meaningful contribution to the development of a cutting-edge, compact, and fully digital phasemeter. To achieve this goal, several key tasks have been outlined as follows.


  • The first step involves identifying and defining the essential technical specifications. This includes parameters such as bandwidth, sampling rate, bit-depth, and noise reduction. These requirements will be derived from the existing zero-crossing-based phasemeter to ensure a solid foundation for the new design.
  • In the second phase, we will design and implement a quadrature demodulation algorithm. This algorithm, along with necessary digital filters, will be integrated into a Zynq System-on-Chip (SoC). This step is crucial in achieving accurate and precise phase measurements.
  • The final stage of the internship will involve creating a comprehensive test bench. This bench will be used to evaluate the performance enhancements achieved by the new phasemeter. Key performance indicators will include signal-to-noise ratio and robustness, particularly in terms of fringe-jump resilience. Importantly, the system must meet stringent hard real-time requirements to be applicable in plasma control scenarios.


By following these steps, this internship aims to enhance the WEST interferometry diagnostic, thereby contributing to a more reliable and efficient plasma control system.

In addition, the student will have the opportunity to gain experience in comprehensive SoC design and become acquainted with a large scientific facility like a tokamak.

"


Moyens / Méthodes / Logiciels:

System-on-Chip, VIVADO, C/C++, Mixed-Signal Oscilloscope, Arbirtrary Waveform Generator, Python/Matl

Analog and digital electronics, hardware-description language, signal processing, computer science and technology, knowledge in physics


Localisation du poste:


Site:

Cadarache


Localisation du poste:

France, Provence-Côte d'Azur, Bouches du Rhône (13)


Ville:

F-13108 SAINT PAUL LEZ DURANCE cedex


Langues:

Anglais (Intermédiaire)


Diplôme préparé:

Bac+- Diplôme École d'ingénieurs


Formation recommandée:

Electronics and computer engineering


Possibilité de poursuite en thèse:

Non


Demandeur:


Disponibilité du poste:

01/02/2024
Plus d'emplois de CEA - Commissariat à l'Energie Atomique
Voir tous les emplois de CEA - Commissariat à l'Energie Atomique