Speaker
Dr
Konstantin Ten
(LIH SB RAS)
Description
When a strong shock wave leaves a metal, flows of particles of different sizes are ejected from the wave’s free surface (shock-wave "dusting", ejecta) [1,2]. Unlike a cumulative jet, such a flow consists of separate particles having a size of a few microns to hundreds of microns. It was assumed that there are also finer particles in such a flow, but the existing techniques are not able to resolve them.
This report presents the results of experiments using SR from the colliders VEPP-3 and VEPP-4 at BINP. Precision measurement of transmitted SR (of an energy of 2 GeV on VEPP-3) was applied to exploration of microparticle flows from a free surface of various materials (copper, tin, and tantalum). Mass distributions along microjets originating from micron-sized slits were obtained. Dynamic detection of small-angle X-ray scattering (SAXS) of synchrotron radiation (SR) from the collider VEPP-4M (energy of 4 GeV) was implemented on the facility SYRAFEEMA (Synchrotron Radiation Facility for Exploring Energetic Materials). A technique of SAXS measurement on this facility enables detection of nanoparticles ranging in size from 4 to 200 nm. Flows of nanoparticles of about 100 nm in size from a surface of smooth foil (tin and tantalum) affected by compressed HMX were detected for the first time.
**1**. V. A. Ogorodnikov, A. G. Ivanov, A. L. Mikhailov,, N.I. Kryukov, A.P. Tolochko, V.A. Golubev. Particle ejection from the shocked free surface of metals and diagnostic methods for these particles // Combustion, Explosion and Shock Waves, 1998, v.34, No 6, pages 696-700.
**2**. Thibaut De Resseguier, Didier Loison, Emilien Lescoute, Loic Signor, Andre Dragon. Dynamic Fragmentation of Laser Shock-melted metals: Some Experimental Advances. Journal of the Theoretical and Applied Mechanics, 2010, 48, 4, pp. 957-972, Warsaw.
Primary author
Dr
Konstantin Ten
(LIH SB RAS)
Co-authors
Dr
Aleksandr Muzyrya
(RF NC VNIITF)
Dr
Aleksey Kashkarov
(LIH SB RAS)
Dr
Boris Tolochko
(ISSCM SB RAS)
Dr
Edvard Pruuel
(LIH SB RAS)
Dr
Evgeniy Smirnov
(RF NC VNIITF)
Prof.
Georgiy Rykovanov
(RF NC VNIITF)
Dr
Ivan Rubtsov
(LIH SB RAS)
Dr
Kirill Prosvirnin
(RF NC VNIITF)
Dr
Lev Shekhtman
(BINP SB RAS)
Dr
Mikhael Stolbikov
(RF NC VNIITF)
Dr
Vladimir Zhulanov
(BINP SB RAS)
