Thumbnail
Access Restriction
Open

Author Kask, Nikolai E. ♦ Leksina, E. G. ♦ Michurin, Sergei V. ♦ Fedorov, Gennadii M. ♦ Chopornyak, D. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CRITICAL PRESSURE ♦ DIELECTRIC MATERIALS ♦ EFFICIENCY ♦ EVAPORATION ♦ FRACTALS ♦ LASER RADIATION ♦ LAYERS ♦ NEODYMIUM LASERS ♦ PLASMA EXPANSION ♦ PLUMES ♦ POWER DENSITY ♦ PULSES ♦ ELECTROMAGNETIC RADIATION ♦ EXPANSION ♦ LASERS ♦ MATERIALS ♦ PHASE TRANSFORMATIONS ♦ PHYSICAL PROPERTIES ♦ RADIATIONS ♦ SOLID STATE LASERS ♦ THERMODYNAMIC PROPERTIES
Abstract The formation of fractals during laser evaporation of various media (metals and dielectrics) by 10-ms Nd laser pulses is studied experimentally as a function of the laser radiation power density and external pressure. It is established that fractals are formed during the action of a laser pulse in the bulk of a plasma plume. It is found that finely dispersed phase forms under a certain critical pressure a bound shell (macrofractal) in peripheral layers of the plume. The presence of the shell confining the plasma expansion leads to a threshold variation of the characteristics of the optical discharge. (interaction of laser radiation with matter. laser plasma)
ISSN 10637818
Educational Use Research
Learning Resource Type Article
Publisher Date 2002-05-31
Publisher Place United States
Journal Quantum Electronics
Volume Number 32
Issue Number 5


Open content in new tab

   Open content in new tab