An investigation of the X-ray point-source brightness for a short-pulse laser plasma

Tallents, G. J.; Key, M. H.; Ridgeley, A.; Shaikh, W.; Lewis, Ciaran; Oneill, D.M.; Davidson, Steven J.; Freeman, N. J.; Perkins, D.

doi:10.1016/0022-4073(90)90065-e

Cited by 11 publications

(7 citation statements)

References 20 publications

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“…Various scaling laws have been developed from experimental observations, however, one should be aware of the inconsistencies that can be found from one set of measurements to another. [3][4][5][6][7] This article is an attempt to show some of the difficulties in presenting a consistent set of data for x-ray conversion efficiency. The data in this article focus on He-like Ti emission from solid targets irradiated on the TRIDENT laser at Los Alamos National Lab, however, many of the issues presented are applicable to any experiment of this type.…”

Section: Analysis Of Ti K-shell Emission Produced From Solid Targets mentioning

confidence: 99%

Analysis of Ti K-shell emission produced from solid targets using nanosecond pulses on the TRIDENT laser facility

Workman

Lanier

Kyrala

2003

Review of Scientific Instruments

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Measurements of Ti He-like x-ray emission (4.75 keV) from solid targets irradiated with nanosecond pulses on the TRIDENT laser facility are examined. Relative x-ray emission and conversion efficiency was measured as a function of laser irradiance conditions using a crystal spectrometer and step-filtered charge coupled device and x-ray film. Data on the x-ray emission with and without random phase plates is presented. Difficulties and caveats in the diagnostic techniques are also presented. Analysis of step-filtered data suggests a high-energy x-ray tail.

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Section: Analysis Of Ti K-shell Emission Produced From Solid Targets mentioning

confidence: 99%

Analysis of Ti K-shell emission produced from solid targets using nanosecond pulses on the TRIDENT laser facility

Workman

Lanier

Kyrala

2003

Review of Scientific Instruments

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“…The observed atomic absorption lines were associated with cool outer parts of the plasma and called the Fraunhofer lines. After this publication, the absorption in LIP was mostly studied in the x-ray and deep UV spectral ranges addressing properties of excited atomic, molecular, and solid species [8][9][10]. In [11], atomic absorption spectrometry using a single device for both light source and sample atomizer has been described for the first time since the explanation of the Fraunhofer lines in the solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

Fraunhofer-type absorption lines in double-pulse laser-induced plasma

Nagli¹,

Gaft²,

Gornushkin

2012

Appl. Opt.

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We studied the confocal double-pulse laser-induced plasma in the very beginning of its life. It was found that the second laser pulse fired 0.7 to 5 µs after the first pulse produces plasma which, during the first 0 to 20 ns, resembles solar configuration. There is a very hot and compact plasma core that radiates a broad continuum spectrum and a much larger and cooler outer shell. The light from the hot core passes through the cold outer shell and is partly absorbed by atoms and ions that are in ground (or close to ground) states. This produces absorption lines that are similar to Fraunhofer lines observed in the sun spectrum. The possibility to use these absorption lines for new direct and calibration free laser-induced breakdown spectroscopy analytical applications, both in laboratory and industrial conditions, is proved.

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“…Some of this experimental work has previously been done. [2][3][4][5][6][7][8][9][10][11] The problem encountered by the experimentalist is that the number of data points is limited and those that do exist often disagree. In some cases discrepancies can be explained by the differences between lasers (in particular the far field distribution).…”

Section: Introductionmentioning

confidence: 99%

<title>Scaling of x-ray K-shell sources from laser-solid interactions</title>

Workman

Kyrala

2001

SPIE Proceedings

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The application of x-ray sources to imaging of dense objects is a standard technique. The quality of the x-ray image depends both on the x-ray source wavelength and on the flux. To improve the flux of the x-ray source it is important to understand how the conversion efficiency scales with laser irradiance and target material. We present measurements of x-ray conversion efficiency in solid Cr, Fe, Ni, Zn and Ge targets as a function of the laser irradiance using the OMEGA laser facility. The results show a steep decrease in the conversion efficiency with increasing Z while the scaling of conversion efficiency with laser irradiance can show a peak. Values for x-ray yield are determined using time-integrated crystal spectrometer data.

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An investigation of the X-ray point-source brightness for a short-pulse laser plasma

Cited by 11 publications

References 20 publications

Analysis of Ti K-shell emission produced from solid targets using nanosecond pulses on the TRIDENT laser facility

Analysis of Ti K-shell emission produced from solid targets using nanosecond pulses on the TRIDENT laser facility

Fraunhofer-type absorption lines in double-pulse laser-induced plasma

<title>Scaling of x-ray K-shell sources from laser-solid interactions</title>

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