The funding of the ELI-NP project from Structural Funds was approved by the European Commission




  Research Activities - RA5 - Fundamental Physics with combined laser and gamma beams

Research Activity 5 (RA5) at ELI-NP proposes experimental setups in the E7 and E4 experimental areas to tackle problems of fundamental physics, taking advantage of the unique configuration and characteristics of the new research infrastructure to be constructed in Magurele, Romania. E4 features two 100 TW laser beams at a repetition rate of 10 Hz (further upgrade to 1 PW / 1 Hz foreseen), while in E7 we have two 10 PW laser beams at a repetition rate of 1 pulse / minute and a high energy tunable gamma radiation beam with energy up to 19.5 MeV.

There are seven research topics proposed:
  • PPEx – The production and photoexcitation of isomers, relevant for stellar conditions;
  • RA5-RR – study of Radiation Reaction to validate nonlinear/non-perturbative QED treatments;
  • Pair – Pair creation in QED regime;
  • Pol – Polarization properties of emission in strong fields;
  • VBir – study of the vacuum birefringence via the depolarization of linearly polarized gamma-rays;
  • DM – search for weakly coupling sub-eV Dark Matter;
  • GG – Gamma-gamma collider to verify the QED-based elastic gamma-gamma scattering.

  • The experimental setups proposed follow a gradual approach from the point of view of complexity, from the "Day 1" experiments to experiments for which the prerequisites include results from the previously performed ones.

    In addition, there are two generic R&D tasks proposed:
  • development of a detection system, Gamma-Polari-Calorimeter (GPC), commonly applicable to energy measurements for electrons, positrons and gamma-rays above the 0.1 GeV energy scale;
  • preparatory tests for laser plasma acceleration of electrons up to necessary energies 210 MeV, 2.5 GeV and 5 GeV for the later stage experiments, respectively.

  • RA5 comprises five Working Groups, with the following specificities:
  • WG1 Physics – Theoretical foundation of the RA5 experimental aims;
  • WG2 Laser Physics / Optics – Theory, application and engineering of complex optical systems;
  • WG3 Simulations – Numerical simulations for optical laser systems and laser-matter interaction;
  • WG4 Mechanics and vacuum R&D - Development of state-of-the-art, mechanical and ultra-high vacuum systems
  • WG5 Detectors, DAQ & Control Systems – development of detector setups, data acquisition systems, control systems for the experiments.

  • Following the interest expressed by the international scientific community for the new capabilities available at ELI-NP, we are collaborating for the implementation of the experimental setups in the E4 and E7 areas with:
  • Hiroshima University, Japan – Prof. K. Homma, Leader of the RA5 TDR;
  • Institute for Chemical Research, University of Kyoto, Japan – the group led by Prof. S. Sakabe, collaboration on RA5-DM experiment topics;
  • KEK, Energy Accelerator Research Organization, Institute of Particle and Nuclear Studies, Japan – collaboration regarding pixelated SoI detectors with the group led by Dr. Y. Arai;
  • Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology (QST) – collaboration with the group led by Prof. M. Kando on topics of laser acceleration of electrons;
  • Konan University – Prof. H. Utsunomiya, collaboration on RA5-PPEx topics.

  • Want to join or team? ELI-NP RA5 has open positions! Please check the Jobs section for available positions and information on how to apply.


    Ovidiu TESILEANU   Head of RA5   CV / Publications
    Stefan ATAMAN   Research Scientist   CV / Publications
    Mihai CUCIUC   Research Scientist   CV / Publications
    Liviu NEAGU   Research Scientist   CV / Publications
    Keita SETO   Research Scientist   CV / Publications
    Vanessa RODRIGUES   Engineer  
    Andrei BERCEANU   Post-doctoral Research Assistant  
    Cesim DUMLU   Post-doctoral Research Assistant  
    Yoshihide NAKAMIYA   Post-doctoral Research Assistant  
    Jian Fuh ONG   Post-doctoral Research Assistant  
    Andrei PATRASCU   Post-doctoral Research Assistant  
    Madalin ROSU   Post-doctoral Research Assistant  
    Jonathan TAMLYN   Technician  

    Former members and former interns

    Kyle JUEDES   Engineer  
    Loris D'ALESSI   Post-doctoral Research Assistant  
    Ming ZENG   Post-doctoral Research Assistant  
    Anca PREDA   Intern - summer 2017  
    Adrian SLATINEANU   Intern - summer 2017  

    The content of this document does not necessarily represent the official position of the European Union or of the Government of Romania.
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