Study of Boron and Molybdenum Plasmas on Multipulse Interaction of Femtosecond Radiation with a Target
- Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan)
Laser plasmas generated by femtosecond radiation on the surface of boron and molybdenum targets are investigated by the shadowgraph method. The modes of single-pulse and multipulse interaction of laser radiation with a target are compared. The occurrence of plasma bullets is discussed, which were observed on both single-pulse and multipulse interaction with the same area of a target. The wavefront velocities of expanding boron and molybdenum plasmas were measured to be 5 x 10{sup 4} and 6 x 10{sup 3} m s{sup -1}, respectively. The electron density measured by interferometry using a time delay of 800 ps in a boron plasma excited by 795-nm radiation with an intensity of 10{sup 16} W cm{sup -2} amounted to 8 x 10{sup 19} cm{sup -3}. The correlation between some specific features of the plasma and the generation of the 3/2 harmonic, observed on multipulse interaction of femtosecond radiation with a boron target, is discussed.
- OSTI ID:
- 20723275
- Journal Information:
- Optics and Spectroscopy, Vol. 99, Issue 6; Other Information: Translated from Optika i Spektroskopiya , ISSN 0030-4034, 99, 1039-1044 (No. 6, 2005); DOI: 10.1134/1.2149426; (c) 2005 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); TN:; ISSN 0030-400X
- Country of Publication:
- United States
- Language:
- English
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