X-ray lasers for imaging and plasma diagnostics

Silva, L. B. Da; Barbee, Troy W.; Cauble, R.; Celliers, P. M.; Harder, J.; Libby, Stephen B.; Lee, H. R.; London, R. A.; Matthews, D. L.; Mrowka, Stanley; Moreno, J. C.; Ress, D.; Trebes, J. E.; Wan, A.S.; Weber, F.

doi:10.1063/1.47989

Cited by 2 publications

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“…These extremely high intensities (10 18 -10 20 W/cm 2 ) allow for the study of novel plasma physics effects emerging from the exotic matter states created by laser-matter interaction and which are of interest to many areas of physical science, including laser and particle beam physics, material science, laboratory astrophysics, and high energy particle physics. The range of applications within these subjects is even wider and extends to the fast ignition approach for inertial confinement fusion [2], plasma density diagnostics [3], new sources of radiation through laser-particle driven acceleration schemes [4] with the potential to develop a new generation of particle injectors that may be suitable for isotope production [5], medical proton therapy [6]. The growing interest in ultra-intense laser-matter interactions and the increasing number of facilities available at national and international laboratories, prompt forward the research on target designs useful to achieve laser-plasma coupling regimes proper to the study of the different phenomena.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of micro-nano engineered targets for high-power laser experiments

Zaffino

Seimetz

Quirion

et al. 2018

Microelectronic Engineering

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The continuous development of ultra-fast high-power lasers (HPL) technology with the ability of working at unprecedented repetition rates, between 1 and 10 Hz, is raising the target needs for experiments in the different areas of interest to the HPL community. Many target designs can be conceived according to specific scientific issues, however to guarantee manufacturing abilities that enable large number production and still allow for versatility in the design is the main barrier in the exploitation of these high repetition rate facilities. Here, we have applied MEMS based manufacturing processes for this purpose. In particular, we have focused on the fabrication and characterization of submicrometric conductive membranes embedded in a silicon frame. These kinds of solid targets are used for laser-driven particle acceleration through the so-called Target Normal Sheath Acceleration mechanism (TNSA). They were obtained by top-down fabrication alternating pattern transfer, atomic layer deposition, and selective material etching. The adaptability of the approach is then analyzed and discussed by evaluating different properties of targets for use in laser-driven particle acceleration experiments. These characteristics include the surface properties of membranes after fabrication and the high density of the target array. Finally, we were able to show their efficiency for laser-driven proton acceleration in a series of experiments with a 3 TW table-top laser facility, achieving stable proton acceleration up to 2 MeV.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of micro-nano engineered targets for high-power laser experiments

Zaffino

Seimetz

Quirion

et al. 2018

Microelectronic Engineering

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“…However it is also necessary to diagnose relatively cold and dense portions of targets, to determine their mass nonuniformity. These cold dense plasmas have been diagnosed by absorption of X-rays from external sources [16,[20][21][22][23][24][25][26][27], including X-ray-lasers [28]. Both spectroscopic diagnostics: emission and absorption, similarly require high spectral, spatial, and temporal resolution.…”

Section: Diagnostics Descriptionmentioning

confidence: 99%

Classical and ablative Richtmyer–Meshkov instability and other ICF-relevant plasma flows diagnosed with monochromatic x-ray imaging

et al. 2008

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Abstract. In inertial confinement fusion (ICF) and high-energy density physics (HEDP), the most important manifestations of the hydrodynamic instabilities and other mixing processes involve lateral motion of the accelerated plasmas. In order to understand the experimental observations and to advance the numerical simulation codes to the point of predictive capability, it is critically important to accurately diagnose the motion of the dense plasma mass. The most advanced diagnostic technique recently developed for this purpose is the monochromatic x-ray imaging that combines large field of view with high contrast, high spatial resolution and large throughput, ensuring high temporal resolution at large magnification. Its application made it possible for the experimentalists to observe for the first time important hydrodynamic effects that trigger compressible turbulent mixing in laser targets, such as ablative Richtmyer-Meshkov (RM) instability, feedout, interaction of a RMunstable interface with rarefaction waves. It also helped to substantially improve the accuracy of diagnosing many other important plasma flows, ranging from laser-produced jets to electromagnetically driven wires in a Z-pinch, and to test various methods suggested for mitigation of the Rayleigh-Taylor instability. We will review the results obtained with the aid of this technique in ICF-HEDP studies at the Naval Research Laboratory and the prospects of its future applications.

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X-ray lasers for imaging and plasma diagnostics

Cited by 2 publications

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Preparation and characterization of micro-nano engineered targets for high-power laser experiments

Preparation and characterization of micro-nano engineered targets for high-power laser experiments

Classical and ablative Richtmyer–Meshkov instability and other ICF-relevant plasma flows diagnosed with monochromatic x-ray imaging

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