This study develops a soft X-ray absorption spectroscopy system for photo-excited material dynamics with one-dimensional spatial resolution. The system consists of a femtosecond-laser-produced plasma X-ray source and a critical illumination system using a KB microscope and has a temporal resolution of approximately 30 ps and a spatial resolution of at least better than 25 /spl mu/m. Snapshots of expanding aluminum plasma as spatially resolved absorption spectra are successfully obtained. The captured images show the blue shift of the Al L/sub II,III/ absorption edge caused by ionization in the ablated plasma. From the amount of soft X-ray absorption, the mean particle density near the target surface 5 ns after the laser pulse irradiation is estimated to be of the order of 10/sup 19/ cm/sup -3/.
Spatiotemporal evolution of soft X-ray absorption in an ablated particle cloud created by a 100-fs laser pulse on an aluminum target
2005-01-01
304990 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
British Library Conference Proceedings | 2005
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