Ablation pressure scaling at short laser wavelength

Dipartimento di Fisica G. Occhialini, Università degli Studi di Milano Bicocca and INFM, Piazza della Scienza 3, 20126 Milan, Italy.
Physical Review E (Impact Factor: 2.33). 01/2004; 68(6 Pt 2):067403. DOI: 10.1103/PhysRevE.68.067403
Source: PubMed

ABSTRACT The ablation pressure at a 0.44-microm laser wavelength has been measured at irradiance up to 2 x 10(14) W/cm(2). The diagnostics consisted in the detection of shock breakout from stepped Al targets. By adopting large focal spots and smoothed laser beams, the lateral energy transport and "drilling effects" have been avoided. The measured scaling shows a fair agreement with analytical models.