Nick Czapla

Hard X-Ray Spectrometers for Dense Plasma Studies Under Extreme Conditions at LCLS

Hae Ja Lee, Eric Galtier, Roberto Alonso-Mori, Bob Nagler et autres

Physics-Guided Deep Learning For High Resolution X-ray Imaging

Shao Xian Lee, Aashwin Mishra, Ariel Arnott, Meriame Berboucha et autres

Imperfections in X-ray imaging systems can limit their performance, especially in High Energy Density (HED) or Inertial Fusion Energy (IFE)-relevant experiments that are typically single shot, by introducing structured, non-stationary features that overlap with the signal of interest. When the X-ray transmission …

Physics-Guided Deep Learning For High Resolution X-ray Imaging

Shao Xian Lee, Aashwin Mishra, Ariel Arnott, Meriame Berboucha et autres

Imperfections in X-ray imaging systems can limit their performance, especially in High Energy Density (HED) or Inertial Fusion Energy (IFE)-relevant experiments that are typically single shot, by introducing structured, non-stationary features that overlap with the signal of interest. When the X-ray transmission …

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Spin crossover in FeO under shock compression

Lélia Libon, Alessandra Ravasio, Silvia Pandolfi, Yanyao Zhang et autres

FeO (wüstite), which exhibits complex electronic and structural properties with increasing pressure and temperature, is a key mineralogical phase for understanding deep planetary interiors. However, direct measurements of its spin state at high-pressure and temperature remain challenging in static compression experiments. Here, …

Spin crossover in FeO under shock compression

Lélia Libon, Alessandra Ravasio, Silvia Pandolfi, Yanyao Zhang et autres

FeO (wüstite), which exhibits complex electronic and structural properties with increasing pressure and temperature, is a key mineralogical phase for understanding deep planetary interiors. However, direct measurements of its spin state at high-pressure and temperature remain challenging in static compression experiments. Here, …

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Data publication: Microscopy X-ray Imaging enriched with Small Angle X-ray Scattering for few nanometer resolution reveals shock waves and compression in intense short pulse laser irradiation of solids

Thomas Kluge, Arthur Emmanuel Hirsch, Jannis Schulz, Nick Czapla et autres

Raw data for publication of "Microscopy X-ray Imaging enriched with Small Angle X-ray Scattering for few nanometer resolution reveals shock waves and compression in intense short pulse laser irradiation of solids" in Frontiers of Physics (2026) The data is contained as pkl …

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Data publication: Microscopy X-ray Imaging enriched with Small Angle X-ray Scattering for few nanometer resolution reveals shock waves and compression in intense short pulse laser irradiation of solids

Thomas Kluge, Arthur Emmanuel Hirsch, Jannis Schulz, Nick Czapla et autres

Raw data for publication of "Microscopy X-ray Imaging enriched with Small Angle X-ray Scattering for few nanometer resolution reveals shock waves and compression in intense short pulse laser irradiation of solids" in Frontiers of Physics (2026) The data is contained as pkl …

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A renewable double plasma mirror for Petawatt-class lasers

Nick Czapla, Derek Nasir, Lieselotte Obst-Huebl, Anthony Zingale et autres

Exceptional pulse contrast can be critical for ultraintense laser experiments, particularly when using solid density targets, and their use is becoming widespread. However, current plasma mirror technology is becoming inadequate for the new generation of high repetition rate, high power lasers now …

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X-ray microscopy and talbot imaging with the matter in extreme conditions X-ray imager at LCLS

Eric Galtier, Hae Ja Lee, Dimitri Khaghani, Nina Boiadjieva et autres

The last decade has shown the great potential that X-ray Free Electron Lasers (FEL) have to study High Energy Density (HED) physics. Experiments at FELs have made significant breakthroughs in Shock Physics and Dynamic Diffraction, Dense Plasma Physics and Warm Dense Matter …

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A Renewable Double Plasma Mirror For Petawatt-class Lasers

Nick Czapla, Derek Nasir, Lieselotte Obst-Huebl, Anthony Zingale et autres

Exceptional pulse contrast can be critical for ultraintense laser experiments, particularly when using solid density targets, and their use is becoming widespread. However, current plasma mirror technology is becoming inadequate for the new generation of high repetition rate, high power lasers now …

Toward direct spatial and intensity characterization of ultra-high-intensity laser pulses using ponderomotive scattering of free electrons

Andrew Longman, Smrithan Ravichandran, Lili Manzo, Calvin He et autres

Spatial distributions of electrons ionized and scattered from ultra-low-pressure gases are proposed and experimentally demonstrated as a method to directly measure the intensity of an ultra-high-intensity laser pulse. Analytic models relating the peak scattered electron energy to the peak laser intensity are …

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Towards direct spatial and intensity characterization of ultra-high intensity laser pulses using ponderomotive scattering of free electrons

Andrew Longman, Smrithan Ravichandran, Lili Manzo, Calvin He et autres

Spatial distributions of electrons ionized and scattered from ultra-low pressure gases are proposed and experimentally demonstrated as a method to directly measure the intensity of an ultra-high intensity laser pulse. Analytic models relating the peak scattered electron energy to the peak laser …