If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Book Page. Potential applications of LiF and other window materials to dynamic high-pressure experimentation are discussed. Refractive Index Database The table below contains links to refractive index data for common materials. The present work has demonstrated the use of z-cut quartz as an optical window to 60 kbar. Optical constants of Ag (Silver) Johnson and Christy 1972: n,k 0.188-1.94 µm. Explore the Index. The refractive index (n) decreases linearly with increasing shock density (ρ) for shock stress above the Hugoniot elastic limit (HEL): n = 2.0485 (± 0.0197) − 0.0729 (± 0.0043)ρ, while n remains nearly a constant for elastic shocks. Another way to prevent getting this page in the future is to use Privacy Pass. - Journal of Dynamic Behavior of Materials. The present results also permit the polarizability behavior of these materials under shock compression to be examined. (24 Hr. Refractive index changes and shock velocities were determined to 60 kbar peak stress. Refractive index data derived from the measured, Laser interferometer systems provide a means for probing the refractive index of transparent specimens subjected to dynamic compression.

"Request". Refractive index of r-cut sapphire under shock pressure range 5 to 65 GPa, Index of refraction of shock-compressed fused silica and sapphire, Refractive index and equation of state of a shock-compressed aqueous solution of zinc chloride, Laser interferometer measurements of refractive index in shock-compressed materials, Optical Response of Soda-Lime Glass Shocked to 14 GPa.

Please try again or contact us if you feel this is in error. Previous interferometer measurements of optical properties under shock loading are reviewed for polymethyl methacrylate, fused silica, sapphire, nitromethane, and an aqueous solution of zinc chloride; various degrees of departure from Gladstone-Dale behavior are noted for these materials.

and extinction coefficient Your IP: As an example, refractive-index effects are calculated for a fused silica window experiencing a slowly rising compression wave generated in a glass-ceramic material.

This finding is used to show that the velocity correction appropriate for a step jump may be applied to monotonically time-dependent wave forms with negligible error. The Hugoniot data are accurately described by a linear variation of shock velocity with particle velocity.

Refractive Index Reference - I. H. Malitson, JOSA, Vol. If the file is not available for download, you can request our proprietary file by clicking 1.58 to 115 GPa. Because fused silica is optically stable and consistent, many use it as a reference or standard for spectroscopic measurements. Above 7.5 GPa, our window correction and refractive index results show significant differences with previously published data for the same material. 55, Issue 10, pp. Because the actual particle velocities were independently known from the projectile velocity measurements, the window correction factor and the refractive index changes were determined over the stress range examined.

For a typical sample of SiO2 the refractive index “Fused quartz” and “fused silica” are medium refractive-index glasses containing predominately SiO2 in the amorphous (non-crystalline) form. Additionally fused quartz/fused silica have a low thermal expansion coefficient and are resistant to scratches, water, and acids. Interferometer data from plate-impact experiments verify sustained LiF transparency for Hugoniot stresses to at least 115 GPa, and establish the variation of LiF refractive index for shock amplitudes ranging from, To investigate the potential use of soda-lime glass (SLG) as an optical window in shock wave experiments, laser interferometry (VISAR) was used to determine the window correction and the refractive index in SLG samples subjected to plane shock wave compression. @article{osti_40204957, title = {Refractive index and elastic properties of z-cut quartz shocked to 60 kbar}, author = {Jones, S C and Gupta, Y M}, abstractNote = {Shock wave experiments were performed to characterize z-cut, {alpha}-quartz as an optical window for velocity interferometry measurements. Potential reasons for these differences are indicated. 1.45704 and 0. Performance & security by Cloudflare, Please complete the security check to access. High-pressure refractive index of optical window materials not only can provide information on electronic polarizability and band-gap structure, but also is important for velocity correction in particle-velocity measurement with laser interferometers. The higher stress experiments displayed a constant state prior to stress unloading. The relations are derived from the Doppler-frequency corrections to velocity-interferometry data obtained by Barker and Hollenbach in plate-impact experiments. The index of refraction of fused quartz is 1.472 for light of wavelength 400 nm and is 1:452 for. August 31, 2018 . In contrast, the lower stress experiments (4.3 and 7.8 GPa) displayed an initial, Refractive index and elastic properties of z-cut quartz shocked to 60 kbar, 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS.


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