High contrast multi-terawatt pulse generation using chirped pulse amplification on the VULCAN laser facility

The structure of laser-shock-compressed polycrystalline iron was probed using in situ x-ray diffraction over a pressure range spanning the α-phase transition. Measurements were also made of the c/a ratio in the phase, which, in contrast with previous in situ x-ray diffraction experiments performed on single crystals and large scale molecular dynamics (MD) simulations are close to those found in high pressure diamond anvil cell experiments. This is consistent with the observation that significant plastic flow occurs within the nanosecond timescale of the experiment. Furthermore, within the sensitivity of the measurement technique, the FCC phase that had been predicted by MD simulations was not observed.

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“…13 The x-rays diffracted from the shocked iron foils were recorded by use of a cylindrical polycrystalline pinhole camera (CPPC)…”

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confidence: 99%

In situx-ray diffraction measurements of thec/aratio in the high-pressureεphase of shock-compressed polycrystalline iron

et al. 2011

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“…The experiments were performed at the UK STFC VULCAN laser facility [6]. The diffracted x-rays from shock compressed 25 μm thick iron foils were recorded using a cylindrical polycrystalline pinhole camera [7].…”

Section: Methodsmentioning

confidence: 99%

Probing dynamic material strength using in situ x-ray diffraction

Hawreliak¹,

El-Dasher²,

Eggert³

et al. 2012

AIP Conference Proceedings

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“…Single crystal x-ray diffraction experiments using similar geometries have been preformed on the Omega lasers system at the University of Rochester [16], Janus laser system at the Lawrence Livermore National Laboratory, and Vulcan laser system at the Rutherford Appleton Laboratory [17] . The point source of x-rays is approximately 1 mm above one side of the driven surface of the sample, as shown in Fig.…”

Section: Techniquementioning

confidence: 99%

In-Situ Probing of Lattice Response in Shock Compressed Materials Using X-Ray Diffraction

Hawreliak¹,

Butterfield²,

Davies³

et al. 2008

AIP Conference Proceedings

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Abstract. Lattice level measurements of material response under extreme conditions are required to build a phenomenological understanding of the shock response of solids. We have successfully used laser produced plasma x-ray sources coincident with laser driven shock waves to make in-situ measurements of the lattice response during shock compression for both single crystal and polycrystalline materials. Using a detailed analysis of shocked single crystal iron which has undergone the α − ε phase transition we can constrain the transition mechanism to be consistent with a compression and shuffle of alternate lattice planes.

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High contrast multi-terawatt pulse generation using chirped pulse amplification on the VULCAN laser facility

Cited by 94 publications

References 14 publications

In situx-ray diffraction measurements of thec/aratio in the high-pressureεphase of shock-compressed polycrystalline iron

In situx-ray diffraction measurements of thec/aratio in the high-pressureεphase of shock-compressed polycrystalline iron

Probing dynamic material strength using in situ x-ray diffraction

In-Situ Probing of Lattice Response in Shock Compressed Materials Using X-Ray Diffraction

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