scholarly journals Laboratory Measurements of X‐Ray Emissions From Centimeter‐Long Streamer Corona Discharges

2017 ◽  
Vol 44 (21) ◽  
Author(s):  
C. L. da Silva ◽  
R. M. Millan ◽  
D. G. McGaw ◽  
C. T. Yu ◽  
A. S. Putter ◽  
...  
Keyword(s):  
Laboratory Measurements ◽  
Corona Discharges ◽  
X Ray ◽  
Streamer Corona

scholarly journals Laboratory Measurements of High‐ n Iron L‐Shell X‐Ray Lines

2007 ◽  
Vol 168 (2) ◽  
pp. 319-336 ◽  
Author(s):  
H. Chen ◽  
M. F. Gu ◽  
E. Behar ◽  
G. V. Brown ◽  
S. M. Kahn ◽  
...  
Keyword(s):  
Laboratory Measurements ◽  
X Ray

X-ray emission in streamer-corona plasma

2009 ◽  
Vol 43 (2) ◽  
pp. 025202 ◽  
Author(s):  
C V Nguyen ◽  
A P J van Deursen ◽  
E J M van Heesch ◽  
G J J Winands ◽  
A J M Pemen
Keyword(s):  
Corona Plasma ◽  
X Ray ◽  
Streamer Corona

scholarly journals Generation of Porous Alumina Layers in a Polydimethylsiloxane/Hydrogen Peroxide Medium on Aluminum Substrate in Corona Discharges

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
A. Groza ◽  
A. Surmeian ◽  
C. Diplasu ◽  
C. Luculescu ◽  
C. Negrila ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Porous Alumina ◽  
Aluminum Substrate ◽  
Corona Discharges ◽  
Negative Corona ◽  
Alumina Layer ◽  
X Ray ◽  
Anodization Process

The porous alumina (Al2O3) layer obtained at the interface between polydimethylsiloxane/hydrogen peroxide medium and aluminum substrate under charged and neutral species injection produced in negative corona discharges in air at atmospheric pressure is analyzed by different methods in this paper. The scanning electron microscopy investigations showed the uniform distribution of the pores formed in the alumina layer and their columnar structures. Both energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) measurements indicate that during the anodization process of the aluminum in the polydimethylsiloxane/hydrogen peroxide medium in corona discharge the incorporation of silicon in the structure of the alumina layer is possible.

scholarly journals Global frequency and geographical distribution of nighttime streamer corona discharges (BLUEs) in thunderclouds

2021 ◽  
Author(s):  
S. Soler ◽  
F. J. Gordillo‐Vázquez ◽  
F. J. Pérez‐Invernón ◽  
A. Luque ◽  
D. Li ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Corona Discharges ◽  
Streamer Corona

scholarly journals Scattering efficiencies measurements of soft protons at grazing incidence from an Athena Silicon Pore Optics sample

2021 ◽  
Author(s):  
Roberta Amato ◽  
Sebastian Diebold ◽  
Alejandro Guzman ◽  
Emanuele Perinati ◽  
Chris Tenzer ◽  
...  
Keyword(s):  
Ad Hoc ◽  
Specular Reflection ◽  
Grazing Incidence ◽  
Physical Models ◽  
Instrumental Performance ◽  
Laboratory Measurements ◽  
Potential Threat ◽  
Scattering Efficiency ◽  
X Ray ◽  
Grazing Incidence Optics

AbstractSoft protons are a potential threat for X-ray missions using grazing incidence optics, as once focused onto the detectors they can contribute to increase the background and possibly induce radiation damage as well. The assessment of these undesired effects is especially relevant for the future ESA X-ray mission Athena, due to its large collecting area. To prevent degradation of the instrumental performance, which ultimately could compromise some of the scientific goals of the mission, the adoption of ad-hoc magnetic diverters is envisaged. Dedicated laboratory measurements are fundamental to understand the mechanisms of proton forward scattering, validate the application of the existing physical models to the Athena case and support the design of the diverters. In this paper we report on scattering efficiency measurements of soft protons impinging at grazing incidence onto a Silicon Pore Optics sample, conducted in the framework of the EXACRAD project. Measurements were taken at two different energies, $\sim $ ∼ 470 keV and $\sim $ ∼ 170 keV, and at four different scattering angles between 0.6∘ and 1.2∘. The results are generally consistent with previous measurements conducted on eROSITA mirror samples, and as expected the peak of the scattering efficiency is found around the angle of specular reflection.

X-Ray Interaction Coefficients: Effect on Interpretation of Solar X-Ray Data

1969 ◽  
Vol 13 ◽  
pp. 352-372 ◽  
Author(s):  
R. L. Blake
Keyword(s):  
Laboratory Measurements ◽  
Interaction Coefficients ◽  
X Ray

The interpretation of solar x-ray data obtained from KAP crystal spectrometers requires new laboratory measurements. We used a plasma x-ray source and a KAP spectrometer similar to solar spectrometers and measured the following.

scholarly journals LABORATORY MEASUREMENTS COMPELLINGLY SUPPORT A CHARGE-EXCHANGE MECHANISM FOR THE “DARK MATTER” ∼3.5 keV X-Ray LINE

2016 ◽  
Vol 833 (1) ◽  
pp. 52 ◽  
Author(s):  
Chintan Shah ◽  
Stepan Dobrodey ◽  
Sven Bernitt ◽  
René Steinbrügge ◽  
José R. Crespo López-Urrutia ◽  
...  
Keyword(s):  
Dark Matter ◽  
Charge Exchange ◽  
Exchange Mechanism ◽  
Laboratory Measurements ◽  
X Ray ◽  
A Charge

Temporal Variations in Distributions of NO and NO2Densities in Streamer Corona Discharges

2006 ◽  
Vol 45 (10B) ◽  
pp. 8264-8269 ◽  
Author(s):  
Hiroshi Kurakane ◽  
Mitsutoshi Aramaki ◽  
Koichi Sasaki
Keyword(s):  
Temporal Variations ◽  
Corona Discharges ◽  
Streamer Corona

scholarly journals Laboratory measurements of geometrical effects in the x-ray emission of optically thick lines for ICF diagnostics

2019 ◽  
Vol 26 (6) ◽  
pp. 063302 ◽  
Author(s):  
G. Pérez-Callejo ◽  
L. C. Jarrott ◽  
D. A. Liedahl ◽  
E. V. Marley ◽  
G. E. Kemp ◽  
...  
Keyword(s):  
Laboratory Measurements ◽  
X Ray ◽  
Geometrical Effects
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