Applied physics letters, 2012-02, Vol.100 (6), p.064101-064101-4
2012
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Characterization of cluster/monomer ratio in pulsed supersonic gas jets
- Ist Teil von
- Applied physics letters, 2012-02, Vol.100 (6), p.064101-064101-4
- Ort / Verlag
- American Institute of Physics
- Erscheinungsjahr
- 2012
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- We determine cluster mass fraction f c ( r , t ) at position r within, and time t after firing, a pulsed supersonic gas jet by measuring femtosecond evolution of the jet's refractive index by single-shot frequency domain holography. A fs pump pulse singly ionizes monomers, while quasi-statically ionizing and heating clusters to a level at which recombination remains negligible as clusters expand. Under these conditions, index evolves in two simple steps corresponding to monomer and cluster contributions, allowing recovery of f c without detailed cluster dynamic modeling. Variations of f c with t are measured.