Μeasurements of Sn Ejecta Particle-Size Distributions Using Ultraviolet In-line Fraunhofer Holography

Reconstruction and interpretation of photon Doppler velocimetry spectrum for ejecta particles from shock-loaded sample in vacuum

“…In real situations, however, the particles of the ejecta usually satisfy certain distributions in terms of velocity and diameter. 2,15,16,18,[32][33][34][35] For the sake of discussion, these assumptions are applied in this paper. Previous studies 2,32 indicate that the initial velocities of particles in the ejecta can be approximated by an exponential law:…”

“…The corresponding PDV spectrum exhibits slight changes over time. 22,36 The particle size distribution is assumed to obey a lognormal law: 16,34…”

“…The particle distribution can also be described by a power law, 15,33,35 but this description may be invalid in the range of small particle sizes (less than 10 µm). 16 In this paper, the particle size is assumed to be independent of its velocity. With these assumptions, the determining factors of the PDV spectrum change to the velocity profile coefficient β , total area mass m 0 , median diameter d m , and size distribution width σ .…”

“…7 In recent decades, extensive investigations on particle ejection have been performed because of its important role in many scientific and engineering fields, including explosion damage, 8 pyrotechnics, 9 and inertial confinement fusion. 10,11 Many experimental approaches have attempted to measure the ejection production, such as the Asay foil, 3,12 foam recovery, 13 piezoelectric probes, 4,14 Fraunhofer holography, 15,16 X-ray/proton radiography, 2,17 Mie scattering, 17,18 , and photon Doppler velocimetry (PDV). [19][20][21][22][23][24][25] The main quantities of interest are the particles' velocity, diameter, and total area mass.…”

Reconstruction and interpretation of photon Doppler velocimetry spectrum for ejecta particles from shock-loaded sample in vacuum*

“…[6] In recent decades, extensive investigations on particle ejection have been performed because of its important role in many scientific and engineering fields, including explosion damage, [7] pyrotechnics, [8] and inertial confinement fusion. [9,10] Many experimental approaches have attempted to measure the ejection production, such as the Asay foil, [3,11] foam recovery, [12] piezoelectric probes, [4,13] Fraunhofer holography, [14,15] x-ray/proton radiography, [2,16] Mie scattering, [16,17] and photon Doppler velocimetry (PDV). [18][19][20][21][22][23][24] In these approaches, Asay foil and piezoelectric probe are mainly used to measure the particles' momentum distribution, x-ray and proton radiography describe the space density of ejecta, foam recovery collects the total ejected mass, and Fraunhofer holography and Mie scattering measure the particles' diameter.…”