English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Multi-MeV flash radiography is often used as the primary diagnostic techniquefor high energy and density (HED) physics experiments. Primary X-ray which isattenuated by the object offers density information of the object. For a thickmetal object with area density as high as 150 g/cm2, the rest part of primaryX-ray which passes through the object may drowned in scattered X-ray fog. Itseriously limits accuracy of density quantification. In this research, anonline scatter estimation method is newly designed which can be easily arrangedby putting an additional slit collimator downstream of the general X-rayradiography layout. The basic ideal of this method is that the proportion ofscatter and primary x-ray will be changed a lot when x-ray passes through aslit like collimation, then scatter component is solvable with known thecollimation performance of the silt on scatter and primary x-ray. Monte Carlosimulation shows that, with this method, evaluation error of average scatter isless than 2% when object area density is as high as 200 g/cm2. In addition tothe average scatter, an accelerated Monte Carlo method is developed to obtainscatter distribution in iterative reconstruction. By employing the Geneticalgorithm as an optimizer, reconstruction can be done by searching a densitywhich projection with scatter best matches experimental result. Thisreconstruction method requires neither a priori-knowledge such as massrestriction nor regularization. Simulations show that for France Test Object(FTO), the error of reconstructed density is less than 2%, and uncertaintybasically covers the real density.

A scatter correction method for Multi-MeV Flash Radiography