Atomic Data for Tungsten

Dear Colleagues,

Tungsten is planned to be used as a plasma-facing material in regions having the highest heat load in ITER because of its excellent thermal conductivity, high melting temperature and low affinity for tritium. However, as an impurity in the plasma tungsten poses severe problems due to its high radiation efficiency. Therefore, it is important to know the atomic properties of tungsten in plasma under conditions ranging from the cold temperature (≃1 eV) of near-wall plasma to the ≃20 keV electron temperature expected in the plasma core. These properties are studied experimentally using plasma devices, beams and trapped ions and theoretically by atomic structure and scattering calculations.

The IAEA Coordinated Research Project (CRP) on “Spectroscopic and Collisional Data for Tungsten in Plasma from 1 eV to 20 keV” was organized with the objective of generating experimental and calculated data for radiative and collisional processes involving tungsten ions in a fusion plasma environment. Processes of interest are excitation and ionization by electron, photon, and proton impact, auto-ionization, radiative de-excitation and recombination, dielectronic recombination, and charge exchange. Data include cross sections, spectroscopic signatures (line radiation), and integrated power loss. The present Special Issue of Atoms invites articles reporting on results obtained in the course of this CRP.

Dr. Peter Beiersdorfer
Dr. Bastiaan J. Braams
Dr. Alfred Müller
Dr. Yuri Ralchenko
Guest Editors

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