Radiation-damaged tungsten is exposed to high-flux, low-energy deuterium plasmas at self-bias conditions. We observe that the fraction of deuterium that penetrates is only 10(-5)-10(-7) of the plasma flux and strongly dependent on the local surface temperature. We propose that deuterium does not directly penetrate bulk tungsten but that it thermalizes at the surface, where it forms a protective...

Galactic destruction of primordial deuterium is inevitably linked through star formation to the chemical evolution of the Galaxy. The relatively high present gas content and low metallicity suggest only modest D-destruction. In concert with deuterium abundances derived from solar system and/or interstellar observations this suggests a primordial deuterium abundance in possible conflict with dat...

Estimates of the interstellar deuterium abundance span a wide range of values. Until recently, it was customary to adopt the abundance of deuterium measured in the Local Bubble as representative of the local one. Now, it is becoming unclear whether the true local deuterium abundance is significantly higher or lower than this value, depending on the interpretation given to current data. It is im...

We describe how thermally produced anti-electron neutrinos (ν̄e) from the homologously collapsing core of a supermassive star (M ∼> 5 × 10 M⊙) can lead to significant deuterium enrichment in the ejected envelope of such a star. Deuterium-enriched material at high redshift might then serve as a clue to the existence of pregalactic supermassive stars. Conceivably, the ejected deuterium-enriched ma...

I summarize three recent calculations of electromagnetic reactions on deuterium in chiral perturbation theory. All of these calculations were carried out to O(Q4), i.e. next-to-next-to-leading order. The reactions discussed here are: elastic electron-deuteron scattering, Compton scattering on deuterium, and the photoproduction of neutral pions from deuterium at threshold.

Abstract Understanding energetic particle transport due to magnetohydrodynamic instabilities excited by particles is essential apprehend alpha confinement in a fusion burning plasma. In the large helical device (LHD), beam ion and deuterium–deuterium fusion-born triton resistive interchange mode destabilized helically-trapped ions (EIC) are studied employing comprehensive neutron diagnostics, s...

Abstract Atomistic simulations with machine-learned potential energy functions are employed for understanding the mechanisms driving sputtering of beryllium by low-energy deuterium and tritium atoms details their retention on pristine surfaces. The interaction between hydrogen/deuterium/tritium surfaces regarding erosion yields is investigated molecular dynamics simulations. both hydrogen isoto...