The interaction of intense femtosecond laser pulses with argon microdroplets studied near the soft x-ray emission threshold

Irsig, Robert; Shihab, Mohammed; Kazak, L.; Bornath, Th.; Tiggesbäumker, J.; Redmer, R.; Meiwes‐Broer, K. H.

doi:10.1088/1361-6455/aa9b94

Cited by 3 publications

(1 citation statement)

References 45 publications

(66 reference statements)

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“…Therefore, slow electrons from doped helium nanodroplets may serve as a sensitive sensor for the metal-to-non-metal transition 48 in an expanding nanoplasma. Hence, in contrast to X-rays, 49 which give insufficient data about the expansion dynamics, electron emission provides details not only about field-enhanced acceleration 50 but also about the long-term plasma conditions.…”

Section: The Journal Of Physical Chemistry Amentioning

confidence: 99%

Comparison of Electron and Ion Emission from Xenon Cluster-Induced Ignition of Helium Nanodroplets

et al. 2018

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The charging dynamics of helium droplets driven by embedded xenon cluster ignition in strong laser fields is studied by comparing the abundances of helium and highly charged Xe ions to the electron signal. Femtosecond pump−probe experiments show that near the optimal delay for highly charged xenon the electron yield increases, especially at low energies. The electron signature can be traced back to the ionization of the helium environment by Xe seed electrons. Accompanying molecular dynamics simulations suggest a two-step ionization scenario in the Xe−He core−shell system. In contrast to xenon, the experimental signal of the helium ions, as well as low-energy electron emission show a deviating delay dependence, indicating differences in the temporal and spacial development of the charge state distribution of Xe core and He surrounding. From the pump−probe dependence of the electron emission, effective temperatures can be extracted, indicating the nanoplasma decay.

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Section: The Journal Of Physical Chemistry Amentioning

confidence: 99%

Comparison of Electron and Ion Emission from Xenon Cluster-Induced Ignition of Helium Nanodroplets

et al. 2018

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Laser-produced plasma soft x-ray source based on an aerosol target

et al. 2020

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Laser produced plasma (LPP) soft x-ray and extreme ultraviolet sources utilize various types of targets. Some of them are based on gaseous targets. The most important disadvantage of such targets is the very limited number of elements that can be used in the gaseous form under normal conditions, including chemical compounds in the gaseous state. In this paper, the authors propose a new type of target, constituting an extension of the gaseous target, namely aerosol target, based on solutions of solid chemical compounds in liquids. Unlike previous attempts to produce aerosol targets from overheated liquids, in our system, the target is created by injection of a mist, preformed in a dedicated cell, into the vacuum chamber. Such targets have many advantages: the emission spectra can be adjusted by choosing proper chemical compounds, the aerosol target is elongated, hence, the laser focus can be positioned at a relatively long distance from the nozzle outlet, its average density can be higher compared to gaseous targets. In this work, such a target and its usefulness for the LPP soft x-ray source was demonstrated. The target was investigated by the soft x-ray backlighting method. Its density distribution at the position of the laser focus was determined. The emission spectra from the soft x-ray range, corresponding to multiple charged ions, originating from the solvent and the diluted salt were measured. Based on numerical simulations of the spectra, an ionic composition of the resulting plasmas was determined.

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High frequency dielectric function of metals taking into account Umklapp processes

Veysman

Röpke

Reinholz

2019

J. Phys.: Conf. Ser.

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The interaction of intense femtosecond laser pulses with argon microdroplets studied near the soft x-ray emission threshold

Cited by 3 publications

References 45 publications

Comparison of Electron and Ion Emission from Xenon Cluster-Induced Ignition of Helium Nanodroplets

Comparison of Electron and Ion Emission from Xenon Cluster-Induced Ignition of Helium Nanodroplets

Laser-produced plasma soft x-ray source based on an aerosol target

High frequency dielectric function of metals taking into account Umklapp processes

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