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Fundamental data for modelling beryllium species in edge plasmas


The large international tokamak experiments JET and ITER both use beryllium in their first walls. The sputtering and subsequent excitation, ionization and chemical reactions that this beryllium undergoes requires accurate fundamental atomic and molecular data to model.

This collaboration brings together fusion modellers and experts in the ab initio calculation of collisional cross sections to evaluate and recommend data related to beryllium in the edge plasma region of these devices for inclusion in a new database to be hosted by the Atomic and Molecular Data Unit. This database will improve modellers’ access to critically-assessed data sets and increase the accuracy of predictions of plasma behaviour.

Species and processes of interest are:

  • Neutral Be: electron impact excitation and ionization cross sections
  • Be+
  • BeH+ and BeD+ molecular ions: state-resolved vibrational excitation and dissociative recombination / excitation cross sections and rate coefficients
  • BeH and BeH2
  • Processes involving H and He
  • H2+ and HD+: electron impact reactive collisions
  • Heavy particle exchange processes such as H2 + Be+ producing BeH+ and related species
Research Groups and other collaborators
Tennyson Group University College London, United Kingdom
Detlev REITER Heinrich Heine University Düsseldorf, Germany
Hyun-Kyung CHUNG Korea Institute of Fusion Energy, South Korea
Ioan F. SCHNEIDER Université du Havre, France
János Zsolt MEZEI Institute for Nuclear Research (ATOMKI), Hungary
Vincenzo LAPORTA CNR Bari, Italy
Yuri RALCHENKO National Institute of Standards and Technology, United States of America