Observed and Theoretical Spectra in the 10–100Å Interval

1988 ◽  
Vol 102 ◽  
pp. 259-261
Author(s):  
W.A. Brown ◽  
M.E. Bruner ◽  
L.W. Acton
Keyword(s):  
Sounding Rocket ◽  
Full Spectrum ◽  
X Ray

AbstractThe soft x-ray spectra recorded in two sounding rocket flights in 1982 and 1985 are compared with with predicted spectra. The poster presents the processed densitometer trace of the full spectrum together with the new spectrum from the 1985 experiment. This note compares the intensities of the lines with predictions.

scholarly journals A study on the relationship between internal nozzle geometry and injected mass distribution of eight ECN Spray G nozzles.

2017 ◽  
Author(s):  
Katarzyna E Matusik ◽  
Daniel J Duke ◽  
Nicholas Sovis ◽  
Andrew B Swantek ◽  
Christopher F Powell ◽  
...  
Keyword(s):  
Mass Distribution ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Gasoline Direct Injection ◽  
Nozzle Geometry ◽  
Hole Density ◽  
Full Spectrum ◽  
Length Scales ◽  
X Ray ◽  
The Relationship

Gasoline direct injection (GDI) nozzles are manufactured to meet geometric specifications with length scales onthe order of a few hundred microns. The machining tolerances of these nominal dimensions are not always knowndue to the difficulty in accurately measuring such small length scales in a nonintrusive fashion. To gain insight intothe variability of the machined dimensions as well as any effects that this variability may have on the fuel spraybehavior, a series of measurements of the internal geometry and fuel mass distribution were performed on a set ofeight nominally duplicate GDI “Spray G” nozzles provided by the Engine Combustion Network. The key dimensionsof each of the eight nozzle holes were measured with micron resolution using full spectrum x-ray tomographicimaging at the 7-BM beamline of the Advanced Photon Source at Argonne National Laboratory. Fuel densitydistributions at 2 mm downstream of the nozzle tips were obtained by performing x-ray radiography measurementsfor many lines of sight. The density measurements reveal nozzle-to-nozzle as well as hole-to-hole density variations.The combination of high-resolution geometry and fuel distribution datasets allows spray phenomena to be linked tospecific geometric characteristics of the nozzle, such as variability in the hole lengths and counterbore diameters,and the hole inlet corner radii. This analysis provides important insight into which geometrical characteristics ofthe nozzles may have the greatest importance in the development of the injected sprays, and to what degreethese geometric variations might account for the total spray variability. The goal of this work is then to further theunderstanding of the relationship between internal nozzle geometry and fuel injection, provide input to improvecomputational models, and ultimately aid in optimizing injector design for higher fuel efficiency and lower emissionsengines.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4766

scholarly journals Detailed X-ray Observations of the Cygnus Loop

1983 ◽  
Vol 101 ◽  
pp. 253-260
Author(s):  
W. H.-M. Ku ◽  
K. Long ◽  
R. Pisarski ◽  
M. Vartanian
Keyword(s):  
High Resolution ◽  
Proportional Counter ◽  
Supernova Remnant ◽  
Sounding Rocket ◽  
Loop Structure ◽  
High Quality ◽  
Radio Structure ◽  
X Ray ◽  
Cygnus Loop ◽  
Spatially Resolved

High quality X-ray spectral and imaging observations of the Cygnus Loop have been obtained with three different instruments. The High Resolution Imager (HRI) on the Einstein Observatory was used to obtain arcsecond resolution images of select bright regions in the Cygnus Loop which permit detailed comparisons between the X-ray, optical, and radio structure of the Loop. The Imaging Proportional Counter (IPC) on the Einstein Observatory was used to obtain an arcminute resolution map of essentially the full Loop structure. Finally, an Imaging Gas Scintillation Proportional Counter (IGSPC), carried aloft by a sounding rocket last fall, obtained modest resolution, spatially resolved spectrophotometry of the Cygnus Loop. An X-ray map of the Loop in the energy of the 0 VIII line was obtained. These data combine to yield a very powerful probe of the abundance, temperature, and density distribution of material in the supernova remnant, and in the interstellar medium.

Observations of the soft X-ray background with the XQC microcalorimeter sounding rocket

2000 ◽  
Vol 444 (1-2) ◽  
pp. 175-179 ◽  
Author(s):  
F.S Porter ◽  
R Almy ◽  
E Apodaca ◽  
E Figueroa-Feliciano ◽  
M Galeazzi ◽  
...  
Keyword(s):  
Sounding Rocket ◽  
X Ray ◽  
X Ray Background

Progress on the Micro-X sounding rocket x-ray telescope: completion of flight hardware

2010 ◽  
Author(s):  
P. Wikus ◽  
J. S. Adams ◽  
R. Baker ◽  
S. R. Bandler ◽  
W. Brys ◽  
...  
Keyword(s):  
Sounding Rocket ◽  
X Ray ◽  
Flight Hardware

The X-ray Quantum Calorimeter Sounding Rocket Experiment: Improvements for the Next Flight

2008 ◽  
Vol 151 (3-4) ◽  
pp. 715-720 ◽  
Author(s):  
D. McCammon ◽  
K. Barger ◽  
D. E. Brandl ◽  
R. P. Brekosky ◽  
S. G. Crowder ◽  
...  
Keyword(s):  
Sounding Rocket ◽  
X Ray ◽  
Rocket Experiment

TPPH/g-C3N4 Nanohybrids Constructed with Surfactant-Assisted Co-assembly for Photocatalytic Hydrogen Generation

NANO ◽  
2021 ◽  
Author(s):  
Ye Shang ◽  
Manfei Lv ◽  
Songtian Li
Keyword(s):  
Hydrogen Production ◽  
Photoelectron Spectroscopy ◽  
Hydrogen Generation ◽  
Separation Efficiency ◽  
Electrochemical Impedance ◽  
Production Capacity ◽  
Noncovalent Interaction ◽  
Full Spectrum ◽  
X Ray ◽  
Photocatalytic Hydrogen Generation

A new type of pure organic 5,10,15,20-tetra (4-hydroxyphenyl) porphyrin (TPPH)/[Formula: see text]-C3N4 nanohybrid was prepared to expand the light absorption range of graphitic carbon nitride materials. The morphology and structure of the composites were systematically characterized by scanning electron microscope, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Results show that after the introduction of TPPH, the visible light area optical absorption of the composite sample increased significantly under the noncovalent interaction of TPPH and [Formula: see text]-C3N4, and the electrochemical impedance spectroscopy and [Formula: see text]–[Formula: see text] measurements confirmed the improved charge separation efficiency of the sample and showed excellent photocatalytic hydrogen production capacity. Under full spectrum irradiation, the hydrogen production of 1.67% TPPH/[Formula: see text]-C3N4 without adding co-catalyst reached 10.87[Formula: see text]mmol[Formula: see text][Formula: see text], about 2.68 times that of pure [Formula: see text]-C3N4 (4.06[Formula: see text]mmol[Formula: see text][Formula: see text]), which showed effective promotion of the electron transfer between TPPH and [Formula: see text]-C3N4.

Eigenvector decomposition of full-spectrum x-ray computed tomography

2012 ◽  
Vol 57 (5) ◽  
pp. 1309-1323 ◽  
Author(s):  
Brian J Gonzales ◽  
David S Lalush
Keyword(s):  
Computed Tomography ◽  
Full Spectrum ◽  
X Ray ◽  
X Ray Computed

Full spectrum calculations of EDXRF spectra

2006 ◽  
Vol 21 (2) ◽  
pp. 152-155 ◽  
Author(s):  
W. T. Elam ◽  
Bob Shen ◽  
Bruce Scruggs ◽  
Joseph Nicolosi
Keyword(s):  
Good Accuracy ◽  
Characteristic Line ◽  
Detector Response ◽  
Compton Profile ◽  
Full Spectrum ◽  
X Ray ◽  
Fundamental Parameters ◽  
Line Intensities ◽  
Wide Range ◽  
Physical Effects

Rapid and accurate methods are becoming available to calculate all of the relevant physical effects that contribute to an energy-dispersive X-ray fluorescence (EDXRF) spectrum, rather than just the characteristic line intensities given by the traditional fundamental parameters method. To evaluate the utility of such methods, we have calculated the full spectra of several compounds covering a wide range of compositions. The calculated spectra are compared directly with measured spectra. They include scattering of the X-ray tube lines and continuum, the Compton profile, and the detector response. Our results indicate that it is now possible to compute the full spectrum from an EDXRF system with very good accuracy.

scholarly journals Detector Calibration for the Micro-X Sounding Rocket X-ray Telescope

2018 ◽  
Vol 193 (5-6) ◽  
pp. 984-990 ◽  
Author(s):  
D. C. Goldfinger ◽  
J. S. Adams ◽  
R. Baker ◽  
S. R. Bandler ◽  
N. Bastidon ◽  
...  
Keyword(s):  
Sounding Rocket ◽  
Detector Calibration ◽  
X Ray
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