Speaker
Description
Ionising radiation induces ultrafast cascades of electronic and structural processes in matter that ultimately govern long-lived radiation damage. However, the connection between picosecond-scale dynamics and macroscopic outcomes remains insufficiently characterised, particularly in complex or nanostructure media and under ultra-high dose-rate conditions. We present measurements of dynamics in both nanostructured silica aerogels and liquid water using picosecond bursts of x rays and laser-accelerated protons. By combining transient photo-absorption and optical streaking diagnostics, we track the full temporal evolution of electron dynamics across previously inaccessible regimes of density and dose-rate.
These measurements establish a new framework for probing radiation-matter interactions in complex systems, linking ultrafast microscopic dynamics to emergent macroscopic damage processes. This provides new frontiers in nanodosimetry and provides critical foundations for predictive models relevant to advanced radiation technologies.
| Working group | WG2 |
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