- Conference date: 19–22 July 2011
- Location: Belfast, Northern Ireland, UK
We have carried out optical Thomson scattering measurements from a laser induced breakdown in He at 1 atmosphere. The breakdown was created with a Nd:YAG laser with 9ns pulse duration and 400mJ pulse energy focused into a chamber filled with He. A second harmonic Nd:YAG laser with 9ns pulses and up to 80mJ energy was used to obtain temporally and spatially resolved data on the electron density and temperature. In parallel experiments, we measured the emission of the 447.1 nm line from He I. Initial results suggest good agreement between densities inferred but full Abel inversion is needed for conclusive results.
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