Radiation protection standards

Taylor, Lauriston S.; Wyckoff, Harold O.

doi:10.1080/10643387109381579

Cited by 12 publications

(13 citation statements)

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“…Laser micro-machining of transparent material by femtosecond pulses promises fast integration of 2D and 3D nanophotonic and nanofluidic devices with tailored properties [1][2][3][4]. Exposition of solid materials to intense laser radiation typically gives rise to complex light-matter interaction processes like high harmonic generation [5], ionization avalanche breakdown [6], and ultrafast plasma dynamics [7].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond self-reconfiguration of laser-induced plasma patterns in dielectrics

et al. 2018

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Laser-induced modification of transparent solids by intense femtosecond laser pulses allows fast integration of nanophotonic and nanofluidic devices with controlled optical properties. Experimental observations suggest that the local and dynamic nature of the interactions between light and the transient plasma plays an important role during fabrication. Current analytical models neglect these aspects and offer limited coverage of nanograting formation on dielectric surfaces. In this paper, we present a self-consistent dynamic treatment of the plasma build-up and its interaction with light within a three-dimensional electromagnetic framework. The main finding of this work is that local light-plasma interactions are responsible for the reorientation of laser-induced periodic plasma patterns with respect to the incident light polarization, when a certain energy density threshold is reached. Plasma reconfiguration occurs within a single laser pulse, on a femtosecond time scale. Moreover, we show that the reconfigured sub-wavelength plasma structures actually grow into the bulk of the sample, which agrees with the experimental observations of self-organized volume nanogratings. We find that mode coupling of the incident and transversely scattered light with the periodic plasma structures is sufficient to initiate the growth and self-organization of the pattern inside the medium with a characteristic half-wavelength periodicity.

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Section: Introductionmentioning

confidence: 99%

Femtosecond self-reconfiguration of laser-induced plasma patterns in dielectrics

et al. 2018

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“…However, when prepared as a thin film at temperatures of 300 ºC, the Cu 2 MnAl phase grows essentially in the B2-stucture with complete site disorder between the Mn-and Al-positions. The B2-type phase of Cu 2 MnAl is known to exhibit low magnetic moments and spin glass order (26) . For a comparison with conventional (f/af)-exchange bias systems (21), (22) , we next look at several characteristic features of the exchange bias phenomenon and for this purpose focus on the [Co 2 MnGe/Au] 30 -multilayer system which shows the largest effect.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Exchange bias in [Co2MnGe/Au]n, [Co2MnGe/Cr]n and [Co2MnGe/Cu2MnAl]n multilayers

Westerholt

Geiersbach

Bergmann

2003

Journal of Magnetism and Magnetic Materials

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We report structural and magnetic properties of multilayers composed of thin layers of the half metallic ferromagnetic Heusler compound Co 2 MnGe and layers of Au, Cr and the Heusler compound Cu 2 MnAl. The hysteresis loops measured at low temperatures reveal the existence of an exchange bias field H EB in all of these multilayers. For the [Co 2 MnGe/Au] n multilayer system H EB is largest reaching up to 1 kOe at a temperature of 2 K. We characterize the exchange bias phenomenon in detail and show that it originates from a spin glass type of magnetic order for a thin interlayer at the interfaces. We discuss the results in the light of different models proposed for the explanation of the exchange bias effect.

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“…Another key development in our search for streams is the FITS viewer frelled, described in Taylor (2015). The main benefit here is the user can interactively create moment maps and contour plots, i.e.…”

Section: Search Techniquementioning

confidence: 99%

Faint and Fading Tails: The Fate of Stripped H i Gas in Virgo Cluster Galaxies

Taylor

Köppen

Jáchym

et al. 2020

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Although many galaxies in the Virgo cluster are known to have lost significant amounts of Hi gas, only about a dozen features are known where the Hi extends significantly outside its parent galaxy. Previous numerical simulations have predicted that Hi removed by ram pressure stripping should have column densities far in excess of the sensitivity limits of observational surveys. We construct a simple model to try and quantify how many streams we might expect to detect. This accounts for the expected random orientation of the streams in position and velocity space as well as the expected stream length and mass of stripped Hi. Using archival data from the Arecibo Galaxy Environment Survey, we search for any streams which might previously have been missed in earlier analyses. We report the confident detection of ten streams as well as sixteen other less sure detections. We show that these well-match our analytic predictions for which galaxies should be actively losing gas, however the mass of the streams is typically far below the amount of missing Hi in their parent galaxies, implying that a phase change and/or dispersal renders the gas undetectable. By estimating the orbital timescales we estimate that dissolution rates of 1-10 M ⊙ yr −1 are able to explain both the presence of a few long, massive streams and the greater number of shorter, less massive features.

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Radiation protection standards

Cited by 12 publications

References 0 publications

Femtosecond self-reconfiguration of laser-induced plasma patterns in dielectrics

Femtosecond self-reconfiguration of laser-induced plasma patterns in dielectrics

Exchange bias in [Co2MnGe/Au]n, [Co2MnGe/Cr]n and [Co2MnGe/Cu2MnAl]n multilayers

Faint and Fading Tails: The Fate of Stripped H i Gas in Virgo Cluster Galaxies

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