Laser resonant shadowgraphy (LRS) and laser nonresonant shadowgraphy (LNRS) are used to monitor the detonation products of lead azide. Photographs of the cloud of products are obtained via illumination with a doubled dye laser tuned on‐resonance to the 3P1o‐3P0 transition of the Pb atom at 283.31 nm, and off‐resonance at 284.31 nm. The versatility of the diagnostics and its applicability to detonation products expanding into vacuum and into atmospheric pressure air are demonstrated. The LRS monitors the density gradients of both lead atoms and solid particles formed in the detonation, whereas the LNRS detects only the latter. Expansion into vacuum through a nozzle leads to an increase in the velocity (from ∼4.5 to ≳5 km/s) and density of the atoms and to a decrease in the density of the particles. The LRS measurements show that the expansion of both products in air is relatively slow (∼0.75 km/s) and leads to production of shock waves. From the shape of the shock waves created by an obstacle when the products expand into vacuum, the Mach number is estimated to be ≳20 in the outer parts and around 3 in the inner parts of the cloud.
Skip Nav Destination
Article navigation
1 November 1993
Research Article|
November 01 1993
Dynamics of the detonation products of lead azide. IV. Laser shadowgraphy of expanding species
Y. Tzuk;
Y. Tzuk
Department of Physics, Ben‐Gurion University of the Negev, Beer‐Sheva 84105, Israel
Search for other works by this author on:
I. Bar;
I. Bar
Department of Physics, Ben‐Gurion University of the Negev, Beer‐Sheva 84105, Israel
Search for other works by this author on:
S. Rosenwaks
S. Rosenwaks
Department of Physics, Ben‐Gurion University of the Negev, Beer‐Sheva 84105, Israel
Search for other works by this author on:
J. Appl. Phys. 74, 5360–5365 (1993)
Article history
Received:
January 25 1993
Accepted:
July 15 1993
Citation
Y. Tzuk, I. Bar, S. Rosenwaks; Dynamics of the detonation products of lead azide. IV. Laser shadowgraphy of expanding species. J. Appl. Phys. 1 November 1993; 74 (9): 5360–5365. https://doi.org/10.1063/1.354238
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Piezoelectric thin films and their applications in MEMS: A review
Jinpeng Liu, Hua Tan, et al.
Efficient methods for extracting superconducting resonator loss in the single-photon regime
Cliff Chen, David Perello, et al.
Related Content
High speed laser shadowgraphy for electromagnetically driven cylindrical implosions
Rev. Sci. Instrum. (August 2001)
Approaching phase-imaging through defocusing shadowgraphy for acoustic resonator diagnosis and the capability of direct index-of-refraction measurements
Rev. Sci. Instrum. (October 2021)
Real time diagnostics of detonation products from lead azide using coherent anti‐Stokes Raman scattering
Appl. Phys. Lett. (December 1991)
Constraining preheat energy deposition in MagLIF experiments with multi-frame shadowgraphy
Phys. Plasmas (March 2019)
Volume measurement of cryogenic deuterium pellets by Bayesian analysis of single shadowgraphy images
Rev. Sci. Instrum. (March 2008)