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Development of backlighting sources for a Compton radiography diagnostic of inertial confinement fusion targets (invited)a)
a)Invited paper, published as part of the Proceedings of the 17th Topical Conference on High-Temperature Plasma Diagnostics, Albuquerque, New Mexico, May 2008
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10.1063/1.2953593
/content/aip/journal/rsi/79/10/10.1063/1.2953593
http://aip.metastore.ingenta.com/content/aip/journal/rsi/79/10/10.1063/1.2953593
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Figures

Image of FIG. 1.
FIG. 1.

Experimental setup used on Titan for the characterization of high-energy backlighters. Magnets (M1 and M2) were used to prevent charged particles from reaching the imaging plates.

Image of FIG. 2.
FIG. 2.

Raw spectra recorded with the DCS for the sequence of elements Ag, Sn, Sm, Ta, Au, and Pb. and are clearly visible, as is also visible the absorption edge of the barium, an element present in the imaging plate sensitive layer. The region above , spanning from 75 up to , has been used for measuring the CE of laser energy into bremsstrahlung.

Image of FIG. 3.
FIG. 3.

CEs into continuum emission for the series of elements from Ag to Pb (squares), compared to the CEs into emission lines from Ta, Au, and Pb, i.e., at about 58, 69, and , respectively (dots). The CEs increase with material density.

Image of FIG. 4.
FIG. 4.

Setup to measure the bremsstrahlung spectra using step-wedge filters coupled to imaging plates (Fuji BAS-MS), IP. The radiograph shown on the right side, recorded by the IP, provides the exposure values from x rays traversing the different filter thicknesses. A best fit to these values is used to determine the bremsstrahlung spectrum.

Image of FIG. 5.
FIG. 5.

CEs into continuum emission from Au microfoils. The CE scales as , in the range of intensities used.

Image of FIG. 6.
FIG. 6.

Edge-on geometry setup to produce radiographs with x rays of photon energy larger than . The thick Cu filter was used to suppress the continuum emission below . The radiograph shown on the right was obtained using a thick Au microfoil backlighter.

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/content/aip/journal/rsi/79/10/10.1063/1.2953593
2008-10-31
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Development of backlighting sources for a Compton radiography diagnostic of inertial confinement fusion targets (invited)a)
http://aip.metastore.ingenta.com/content/aip/journal/rsi/79/10/10.1063/1.2953593
10.1063/1.2953593
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