SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS
Multikilobar shocks were launched into single crystals of (111) silicon with a 1-ns pulse (full width at half maximum) of 1.06-m light at an irradiance of 1091010 W cm-2 using the JANUS research laser at Lawrence Livermore National Laboratory. Transient strains on the order of several percent were t...
| Asıl Yazarlar: | , , , , |
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| Materyal Türü: | Journal article |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
1989
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| _version_ | 1826299809700511744 |
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| author | Wark, J Whitlock, R Hauer, A Swain, J Solone, P |
| author_facet | Wark, J Whitlock, R Hauer, A Swain, J Solone, P |
| author_sort | Wark, J |
| collection | OXFORD |
| description | Multikilobar shocks were launched into single crystals of (111) silicon with a 1-ns pulse (full width at half maximum) of 1.06-m light at an irradiance of 1091010 W cm-2 using the JANUS research laser at Lawrence Livermore National Laboratory. Transient strains on the order of several percent were thus introduced into the crystal. During the compression of the crystal a short (100 ps) intense burst of x-ray line radiation was produced by focusing a second laser beam, synchronous but delayed with respect to the shock-driving beam, onto a solid target. The x rays were Bragg diffracted from the surface of the shocked crystal, and recorded on x-ray film. The spectral brightness of the x rays was sufficient to allow data to be recorded on a single laser shot. The shift in the Bragg angle with compression allows the interatomic spacings to be directly measured in the shocked region. A sequence of shots at various delay times and laser irradiances was recorded, mapping the interatomic spacing as a function of time. Compression above the Hugoniot elastic limit was achieved, with evidence of single-crystal nature being preserved. The compression results are in good agreement with calculations based on hydrodynamic-code pressure simulations and dynamical diffraction theory. The relevance of the technique to some of the fundamental problems of shock-wave physics and phase transitions is discussed. © 1989 The American Physical Society. |
| first_indexed | 2024-03-07T05:07:36Z |
| format | Journal article |
| id | oxford-uuid:da747586-1e1d-4504-a8ec-2c566882f787 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:07:36Z |
| publishDate | 1989 |
| record_format | dspace |
| spelling | oxford-uuid:da747586-1e1d-4504-a8ec-2c566882f7872022-03-27T09:03:24ZSUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALSJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:da747586-1e1d-4504-a8ec-2c566882f787EnglishSymplectic Elements at Oxford1989Wark, JWhitlock, RHauer, ASwain, JSolone, PMultikilobar shocks were launched into single crystals of (111) silicon with a 1-ns pulse (full width at half maximum) of 1.06-m light at an irradiance of 1091010 W cm-2 using the JANUS research laser at Lawrence Livermore National Laboratory. Transient strains on the order of several percent were thus introduced into the crystal. During the compression of the crystal a short (100 ps) intense burst of x-ray line radiation was produced by focusing a second laser beam, synchronous but delayed with respect to the shock-driving beam, onto a solid target. The x rays were Bragg diffracted from the surface of the shocked crystal, and recorded on x-ray film. The spectral brightness of the x rays was sufficient to allow data to be recorded on a single laser shot. The shift in the Bragg angle with compression allows the interatomic spacings to be directly measured in the shocked region. A sequence of shots at various delay times and laser irradiances was recorded, mapping the interatomic spacing as a function of time. Compression above the Hugoniot elastic limit was achieved, with evidence of single-crystal nature being preserved. The compression results are in good agreement with calculations based on hydrodynamic-code pressure simulations and dynamical diffraction theory. The relevance of the technique to some of the fundamental problems of shock-wave physics and phase transitions is discussed. © 1989 The American Physical Society. |
| spellingShingle | Wark, J Whitlock, R Hauer, A Swain, J Solone, P SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS |
| title | SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS |
| title_full | SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS |
| title_fullStr | SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS |
| title_full_unstemmed | SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS |
| title_short | SUBNANOSECOND X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS |
| title_sort | subnanosecond x ray diffraction from laser shocked crystals |
| work_keys_str_mv | AT warkj subnanosecondxraydiffractionfromlasershockedcrystals AT whitlockr subnanosecondxraydiffractionfromlasershockedcrystals AT hauera subnanosecondxraydiffractionfromlasershockedcrystals AT swainj subnanosecondxraydiffractionfromlasershockedcrystals AT solonep subnanosecondxraydiffractionfromlasershockedcrystals |