Author: Starritt, A. C.
Paper Title Page
WEBPL07
 Optimised Multi-Dimensional Image Scanning With Rascan  
 
  • N. Afshar, D. Howard, D. Paterson, A. C. Starritt, M.D. de Jonge
    ANSTO, Menai, New South Wales, Australia
  
  On-the-fly scan­ning has sig­nif­i­cantly im­proved one di­men­sional scans by re­mov­ing mo­tion over­heads be­tween pix­els. How­ever, re­al­i­sa­tion of multi-di­men­sional tech­niques such as to­mog­ra­phy and XANES imag­ing is presently stymied by over­heads that occur on a line-by-line basis. At the Aus­tralian Syn­chro­tron's XFM beam­line, in­evitable "over­heads" can add up to a sig­nif­i­cant wasted beam time. There­fore, there is a clear need for fur­ther op­ti­mi­sa­tion of scan mo­tion to for­mu­late and min­imise higher di­men­sional over­heads. Here we out­line our ap­proach to re­alise tra­jec­tory scans that are op­ti­mised for tra­jec­tory track­ing ac­cu­racy with min­imised over­head times. The scan mo­tion is seen as fly-scan lines, and over­head moves be­tween the lines which form a two di­men­sional raster scan in a trans­formed geom­e­try. This sep­a­ra­tion of 're­quired' and 'over­head' mo­tions has pro­vided an ef­fi­cient plat­form for for­mu­lat­ing an op­ti­mi­sa­tion prob­lem which is solved to ob­tain the op­ti­mised scan tra­jec­tory. The so­lu­tion known as Ras­can, is in op­er­a­tion at the XFM beam­line of the Aus­tralian Syn­chro­tron since May 2016, re­sult­ing in sig­nif­i­cant gains in through­put, per­for­mance and ef­fi­ciency.  
video icon Talk as video stream: https://youtu.be/tOAJHUr44i8  
slides icon Slides WEBPL07 [3.122 MB]  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)