Optical probing of high intensity laser interaction with micron-sized cryogenic hydrogen jets

Ziegler, Tim; Rehwald, Martin; Obst, L.; Bernert, Constantin; Brack, Florian‐Emanuel; Curry, C. B.; Gauthier, M.; Glenzer, S. H.; Göde, S.; Kazak, L.; Kraft, Stephan; Kuntzsch, Michael; Loeser, Markus; Metzkes-Ng, Josefine; Rödel, Christian; Schlenvoigt, Hans-Peter; Schramm, U.; Siebold, M.; Tiggesbäumker, J.; Wolter, Steffen; Zeil, Karl

doi:10.1088/1361-6587/aabf4f

Cited by 8 publications

(10 citation statements)

References 36 publications

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“…To benchmark the temporal delay stability between pump and probe laser we first conduct noise measurements of each individual laser oscillator with a stable external clock (FSWP by Rohde-Schwarz) and secondly of the combined and amplified laser systems on the beam arrival monitor (BAM) 25 . The supplementary Fig.…”

Section: Methodsmentioning

confidence: 99%

“…An important aspect is the temporal synchronization of both laser systems and two options are commonly used. Either pump and probe laser share the same laser oscillator 24 or a stand-alone probe laser oscillator is electronically synchronized to the pump laser oscillator 25 . Here, the performance of the second option by utilizing commercially available lock-electronics together with one centralized clock for both lasers is presented (for details see Methods section).…”

Section: Experimental Setup and Temporal Synchonizationmentioning

confidence: 99%

“…self-guiding and probing of the resulting filament in air. The timing uncertainty of a BAM measurement is 25 . Together with the pulse duration of the probe laser, the temporal resolution of a time delay scan is calculated to be .…”

Section: Experimental Setup and Temporal Synchonizationmentioning

confidence: 99%

“…This complicates the application of advanced probing techniques like polarimetry or few-cycle optical probing 21 – 23 . A promising path to overcome this issue is the shift of the probing wavelength away from the fundamental and the harmonic wavelengths of the high-intensity pump laser 24 , 25 , hereafter referred to as “off-harmonic optical probing”.…”

Section: Introductionmentioning

confidence: 99%

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Off-harmonic optical probing of high intensity laser plasma expansion dynamics in solid density hydrogen jets

Bernert

Assenbaum

Brack

et al. 2022

Sci Rep

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Due to the non-linear nature of relativistic laser induced plasma processes, the development of laser-plasma accelerators requires precise numerical modeling. Especially high intensity laser-solid interactions are sensitive to the temporal laser rising edge and the predictive capability of simulations suffers from incomplete information on the plasma state at the onset of the relativistic interaction. Experimental diagnostics utilizing ultra-fast optical backlighters can help to ease this challenge by providing temporally resolved inside into the plasma density evolution. We present the successful implementation of an off-harmonic optical probe laser setup to investigate the interaction of a high-intensity laser at $$5.4\times 10^{21}\,\hbox {W/cm}^{2}$$ 5.4 × 10 21 W/cm 2 peak intensity with a solid-density cylindrical cryogenic hydrogen jet target of $${5}\,{\upmu }\mathrm{m}$$ 5 μ m diameter as a target test bed. The temporal synchronization of pump and probe laser, spectral filtering and spectrally resolved data of the parasitic plasma self-emission are discussed. The probing technique mitigates detector saturation by self-emission and allowed to record a temporal scan of shadowgraphy data revealing details of the target ionization and expansion dynamics that were so far not accessible for the given laser intensity. Plasma expansion speeds of up to $$(2.3 \pm 0.4)\times 10^{7}\,\hbox {m/s}$$ ( 2.3 ± 0.4 ) × 10 7 m/s followed by full target transparency at $${1.4}\,{\mathrm{ps}}$$ 1.4 ps after the high intensity laser peak are observed. A three dimensional particle-in-cell simulation initiated with the diagnosed target pre-expansion at $${-0.2}\,{\mathrm{ps}}$$ - 0.2 ps and post processed by ray tracing simulations supports the experimental observations and demonstrates the capability of time resolved optical diagnostics to provide quantitative input and feedback to the numerical treatment within the time frame of the relativistic laser-plasma interaction.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Setup and Temporal Synchonizationmentioning

confidence: 99%

Section: Experimental Setup and Temporal Synchonizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Off-harmonic optical probing of high intensity laser plasma expansion dynamics in solid density hydrogen jets

Bernert

Assenbaum

Brack

et al. 2022

Sci Rep

Self Cite

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“…The temporal contrast characterization is complemented on a broader temporal range by a scanning third order auto-correlator (Sequoia by Amplitude Technologies), allowing for multi-shot contrast measurements on the few 100 ps-timescale. In combination with the available probing techniques (not subject of this work but details can be found in [15,16]), this setup sets the stage for in-depth investigation of the particular target density distribution that results from interaction with laser light preceding the main laser peak (i. e. ASE, pre-pulses and the rising slope on the ps-timescale), and the resulting proton beam characteristics after interaction with the main pulse. This work focuses on the implementation and commissioning of a recollimating single Figure 1.…”

Section: Introductionmentioning

confidence: 99%

On-shot characterization of single plasma mirror temporal contrast improvement

Obst

Metzkes-Ng

Bock

et al. 2018

Plasma Phys. Control. Fusion

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We report on the setup and commissioning of a compact recollimating single plasma mirror for temporal contrast enhancement at the Draco 150 TW laser during laser-proton acceleration experiments. The temporal contrast with and without plasma mirror is characterized single-shot by means of self-referenced spectral interferometry with extended time excursion (SRSI-ETE) at unprecedented dynamic and temporal range. This allows for the first single-shot measurement of the plasma mirror trigger point, which is interesting for the quantitative investigation of the complex pre-plasma formation process at the surface of the target used for proton acceleration. As a demonstration of high contrast laser plasma interaction we present proton acceleration results with ultra-thin liquid crystal targets of ∼ 1 µm down to 10 nm thickness. Focus scans of different target thicknesses show that highest proton energies are reached for the thinnest targets at best focus. This indicates that the contrast enhancement is effective such that the acceleration process is not limited by target pre-expansion induced by laser light preceding the main laser pulse.

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Parametric amplification as a single-shot time-resolved off-harmonic probe for laser–matter interactions

Grepl

Tryus

Chagovets

et al. 2023

High Pow Laser Sci Eng

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An optical probing of laser-plasma interactions can provide time-resoved measurements of plasma density; however single-shot and multi-frame probing capabilities generally rely on complex setups with a limited flexibility. We have demonstrated a new method for temporal resolution of the rapid dynamics ( 170: fs) of plasma evolution within a single laser shot based on the generation of several consecutive probe pulses from a single Beta Barium Borate (BBO) based optical parametric amplifier using a fraction of the driver pulse with the possibility to adjust central wavelengths and delays of particular pulses by optical delay lines. The flexibility and scalability of the proposed experimental technique is presented and discussed.

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Optical probing of high intensity laser interaction with micron-sized cryogenic hydrogen jets

Cited by 8 publications

References 36 publications

Off-harmonic optical probing of high intensity laser plasma expansion dynamics in solid density hydrogen jets

Off-harmonic optical probing of high intensity laser plasma expansion dynamics in solid density hydrogen jets

On-shot characterization of single plasma mirror temporal contrast improvement

Parametric amplification as a single-shot time-resolved off-harmonic probe for laser–matter interactions

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