High Energy Density Science at the Linac Coherent Light Source

Lee, R W

doi:10.2172/924177

Cited by 2 publications

(4 citation statements)

References 44 publications

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“…f. MEC The MEC instrument is specifically designed to study High Energy Density (HED) matter whose energy density exceeds 10 11 Jm −3 , or where the pressure exceeds 1 Mbar (Lee, 2007;Nagler et al, 2015). HED matter is transient and very difficult to simultaneously create, characterize, and measure in a lab.…”

Section: X-ray Instrumentsmentioning

confidence: 99%

“…The properties of an X-ray FEL source facilitate experimental access to an important subset of this regime, namely the properties of dense matter in two extreme states: warm dense matter (WDM) and hot dense matter (HDM). WDM is material at nearsolid density and a finite temperature, e.g., from 1 eV to ∼10 eV, comparable to the Fermi energy (Lee, 2007). Theoretical understanding of this regime is complicated by the fact that it is not well described by condensed matter or plasma theories.…”

Section: Matter In Extreme Conditionsmentioning

confidence: 99%

“…With the ability to create well-defined plasmas using ultrashort X-ray FEL pulses, X-ray emission spectra can be used to yield basic atomic physics information for the development of population kinetic models of the system. Such measurements are key building blocks for understanding the behavior of WDM or HDM (Lee, 2007).…”

Section: Warm Dense Matter and Hot Dense Mattermentioning

confidence: 99%

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Linac Coherent Light Source: The first five years

et al. 2016

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A new scientific frontier opened in 2009 with the start of operations of the world's first X-ray free-electron laser (FEL), the Linac Coherent Light Source (LCLS), at SLAC National Accelerator Laboratory. LCLS provides femtosecond pulses of X-rays (270 eV to 11.2 keV) with very high peak brightness to access new domains of ultrafast X-ray science. This article presents the fundamental FEL physics and outlines the LCLS source characteristics, along with the experimental challenges, strategies, and instrumentation that accompany this novel type of X-ray source. The main part of the article reviews the scientific achievements since the inception of LCLS in the five primary areas it serves: atomic, molecular and optical physics, condensed matter physics, matter in extreme conditions, chemistry and soft matter, and biology.

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Section: X-ray Instrumentsmentioning

confidence: 99%

Section: Matter In Extreme Conditionsmentioning

confidence: 99%

Section: Warm Dense Matter and Hot Dense Mattermentioning

confidence: 99%

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Linac Coherent Light Source: The first five years

et al. 2016

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“…They provide few femtosecond pulses, which open new possibilities for time-resolved x-ray PCI. For instance, ultrafast x-ray PCI can be used to investigate fundamental physics of shock compression in materials, such as shock wave propagation or phase transitions [34][35][36][37]. Even schemes to generate XFEL pulses with attosecond durations have been proposed [38][39][40], advancing into the realm of electronic timescales.…”

Section: Introductionmentioning

confidence: 99%

X-ray phase-contrast imaging: the quantum perspective

Slowik

Santra

2013

J. Phys. B: At. Mol. Opt. Phys.

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Time-resolved phase-contrast imaging using ultrafast x-ray sources is an emerging method to investigate ultrafast dynamical processes in matter. Schemes to generate attosecond x-ray pulses have been proposed, bringing electronic timescales into reach and emphasizing the demand for a quantum description. In this paper, we present a method to describe propagation-based x-ray phase-contrast imaging in nonrelativistic quantum electrodynamics. We explain why the standard scattering treatment via Fermi’s golden rule cannot be applied. Instead, the quantum electrodynamical treatment of phase-contrast imaging must be based on a different approach. It turns out that it is essential to select a suitable observable. Here, we choose the quantum-mechanical Poynting operator. We determine the expectation value of our observable and demonstrate that the leading order term describes phase-contrast imaging. It recovers the classical expression of phase-contrast imaging. Thus, it makes the instantaneous electron density of non-stationary electronic states accessible to time-resolved imaging. Interestingly, inelastic (Compton) scattering does automatically not contribute in leading order, explaining the success of the semiclassical description.

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High Energy Density Science at the Linac Coherent Light Source

Cited by 2 publications

References 44 publications

Linac Coherent Light Source: The first five years

Linac Coherent Light Source: The first five years

X-ray phase-contrast imaging: the quantum perspective

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