Modeling of laser-driven proton radiography of dense matter

Kar, S.; Borghesi, M.; Audebert, P.; Benuzzi‐Mounaix, A.; Boehly, T. R.; Hicks, D. G.; Kœnig, M.; Lancaster, Kate; LePape, S.; Mackinnon, A. J.; Norreys, P.; Patel, P. K.; Romagnani, L.

doi:10.1016/j.hedp.2007.11.002

Cited by 26 publications

(14 citation statements)

References 33 publications

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“…Although the two latter properties are advantageous in plasma radiography applications [2][3][4][5][6] , these are generally undesirable in view of many other potential applications [7,8] . Therefore controlling and optimising the laser driven ion beam parameters has been one of the intensively studied research topic over the past decade [8][9][10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Proton probing of laser-driven EM pulses travelling in helical coils

Ahmed

Kar

Giesecke

et al. 2017

High Pow Laser Sci Eng

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The ultrafast charge dynamics following the interaction of an ultra-intense laser pulse with a foil target leads to the launch of an ultra-short, intense electromagnetic (EM) pulse along a wire connected to the target. Due to the strong electric field (of the order of GV m −1 ) associated to such laser-driven EM pulses, these can be exploited in a travelling-wave helical geometry for controlling and optimizing the parameters of laser accelerated proton beams. The propagation of the EM pulse along a helical path was studied by employing a proton probing technique. The pulse-carrying coil was probed along two orthogonal directions, transverse and parallel to the coil axis. The temporal profile of the pulse obtained from the transverse probing of the coil is in agreement with the previous measurements obtained in a planar geometry. The data obtained from the longitudinal probing of the coil shows a clear evidence of an energy dependent reduction of the proton beam divergence, which underpins the mechanism behind selective guiding of laser-driven ions by the helical coil targets.

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Section: Introductionmentioning

confidence: 99%

Proton probing of laser-driven EM pulses travelling in helical coils

Ahmed

Kar

Giesecke

et al. 2017

High Pow Laser Sci Eng

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“…These are similar to the impact of a small stone in your windshield, and like those, sometimes cracks can be seen spreading from the impact location. It is clear from these typical results that a clear, high signal-to-noise ratio result is a challenging task, especially with the goal of obtaining clear 2D radiographs similar to those in laser plasmas interaction [1][2][3][4]. Note that of course we choose an on-axis location and that a radial location is possibly less challenging.…”

Section: A High Debris Environmentmentioning

confidence: 98%

“…Proton radiography is a relatively new technique that uses charged particle beams, namely protons, to gain a deeper understanding of the electric and magnetic fields present in plasmas [1][2][3][4]. This technique allows a better characterization of the physics associated with High Energy Density plasmas and extremes states of matter of relevance for inertial fusion [5], laboratory astrophysics, shocks, laser plasma interactions, or equation of states.…”

Section: Introductionmentioning

confidence: 99%

Advantages of a soft protective layer for good signal-to-noise ratio proton radiographs in high debris environments

Galloudec

Cobble

Nelson

et al. 2011

High Energy Density Physics

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Proton radiography is a very powerful diagnostic but in some high debris environments it may be challenging to get a good signal-to-noise ratio radiograph to gain insights into the electric and magnetic field topology, and thus the basic physics. Such environments are produced for example on z-pinches and also on lasers such as the National Ignition Facility. We demonstrate here the feasibility of clean, very high signal-to-noise ratio proton radiographs in extremely hostile environments.2

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“…In this pursuit the proton radiography diagnostic technique [76,22,15,156,23] has enjoyed considerable success, providing insight into megagauss-scale electromagnetic fields in inertial confinement fusion (ICF) implosions [132,119,111,82,186,114,118,68,21,190,115,137,139,138,117,224] , large-scale self-organizing electromagnetic field structures in high velocity counter-streaming plasma flows [97], magnetic reconnection processes [151,113,217], HED plasma instabilities [112,77,56,61,60] and more. Fig.…”

Section: Ultrafast Imaging Systemsmentioning

confidence: 99%

Modeling of Intense Laser Driven High Energy Density Plasmas

Levy¹

2014

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Illuminating matter with petawatt (one quadrillion watts) laser light creates extreme states of plasmas with temperatures exceeding ten million degrees Celsius and pressures exceeding one billion earth atmospheres. These high energy density conditions are driven at the microscopic scale by dense currents of relativistic electrons, oscillating violently in the intense laser fields, as well as the plasma processes arising when these particles lose phase coherence and are injected into bulk target material. Suitably harnessed, this setup opens the way to compact relativistic particle accelerators, laser fusion energy sources, laboratory astrophysics, ultrafast imaging systems, proton cancer therapies, anti-matter creation, high-energy radiation sources and intense high harmonic generation. In this thesis, theoretical models of the absorption of high power laser light by matter are derived, applications of these models are investigated, and simulation tools supporting the diagnosis and implementation of these applications are developed.In particular, an advanced, relativistically-correct theoretical model of petawatt laser absorption by optically-thick targets is developed, accounting for both ion and electron beam aspects of the interaction. Predictions of the model for the energetic properties of these beams, as well as the dynamical motion of the laser-matter interface, are elucidated. Results from high resolution, relativistic, kinetic particle-in-cell simulations using the LSP code are shown to be in good agreement with the model. intensity I l and wavelength l . These results are shown to bound several dozens of published experimental and simulation data points, underlining the usefulness of the iii model. These results are extended to include e↵ects related to heterogeneous plasmas, including relativistically-underdense plasmas relevant to 'pre-plasma' situations, and realistic laser spatio-temporal profiles. Our dynamic considerations of absorption processes are then extended to the 10-petawatt scale. In a manner that could support reaching the QED-plasma regime, a mechanism of focusing high power laser light to higher intensities is elucidated. Supporting the measurement and validation of these models, the development of a new simulation tool for understanding high energy density plasmas, based on the proton radiography technique, is detailed. AcknowledgementsOver the past 5 1 / 2 years it has often seemed that pursuit of graduate studies has formed an exercise in the stewardship of resources entrusted to me by advisors, mentors, collaborators and others. In endeavors bearing fruit, my stewardship of these resources has seemed adequate. In the totality of outcomes, to these people I wish to express my warmest and deepest gratitude. At Livermore I am particularly grateful to Tony Link for interesting and useful discussions on intense laser-plasma interactions and on the LSP code. I also wish to thank my colleagues

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Modeling of laser-driven proton radiography of dense matter

Cited by 26 publications

References 33 publications

Proton probing of laser-driven EM pulses travelling in helical coils

Proton probing of laser-driven EM pulses travelling in helical coils

Advantages of a soft protective layer for good signal-to-noise ratio proton radiographs in high debris environments

Modeling of Intense Laser Driven High Energy Density Plasmas

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