Blind deconvolution for spatial distribution of Kα emission from ultraintense laser-plasma interaction.

The spatial distributions of the Kα emission from foil targets irradiated with ultra-intensity laser pulses have been studied using the x-ray coded imaging technique. Due to the effect of hard x-ray background contamination, noise as well as imperfection of imaging system, it is hard to determine the PSF analytically or measure it experimentally. Therefore, we propose a blind deconvolution method to restore both the spatial distributions of the Kα emission and the system's PSF from the coded images based on the maximum-likelihood scheme. Experimental restoration results from penumbral imaging and ring coded imaging demonstrated that both the structure integrity and the rich detail information can be well preserved.

[1]  Michael A. King,et al.  An interior point iterative maximum-likelihood reconstruction algorithm incorporating upper and lower bounds with application to SPECT transmission imaging , 2001, IEEE Transactions on Medical Imaging.

[2]  R. B. Stephens,et al.  Hot electron temperature and coupling efficiency scaling with prepulse for cone-guided fast ignition. , 2012, Physical review letters.

[3]  D. Neely,et al.  Refluxing of fast electrons in solid targets irradiated by intense, picosecond laser pulses , 2011 .

[4]  Stefano Atzeni,et al.  Stopping and scattering of relativistic electron beams in dense plasmas and requirements for fast ignition , 2008 .

[5]  Philippe Troussel,et al.  Microfocusing between 1 and 5 keV with Wolter-type optics , 1999, Optics & Photonics.

[6]  Jianjun Dong,et al.  Richardson–Lucy method for decoding x-ray ring code image , 2007 .

[7]  H H Barrett,et al.  Fresnel zone plate imaging of gamma rays; theory. , 1973, Applied optics.

[8]  Andrea Kritcher,et al.  X-ray Radiography and Scattering Diagnosis of Dense Shock-Compressed Matter , 2010 .

[9]  Chrysanthe Preza,et al.  Depth-variant maximum-likelihood restoration for three-dimensional fluorescence microscopy. , 2004, Journal of the Optical Society of America. A, Optics, image science, and vision.

[10]  K. Sokolowski-Tinten,et al.  Optimized Kalpha x-ray flashes from femtosecond-laser-irradiated foils. , 2009, Physical review. E, Statistical, nonlinear, and soft matter physics.

[11]  Peter A. Norreys,et al.  Temperature sensitivity of Cu Kα imaging efficiency using a spherical Bragg reflecting crystal , 2007 .

[12]  E. Fill,et al.  Spatial characteristics of Kα radiation from weakly relativistic laser plasmas , 2000 .

[13]  E. Dewald,et al.  High Kα x-ray conversion efficiency from extended source gas jet targets irradiated by ultra short laser pulses , 2008 .

[14]  H Schwoerer,et al.  Spatial characteristics of Kalpha x-ray emission from relativistic femtosecond laser plasmas. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.

[15]  L. Gizzi,et al.  A novel technique for single-shot energy-resolved 2D x-ray imaging of plasmas relevant for the inertial confinement fusion. , 2012, The Review of scientific instruments.

[16]  Jeffrey A. Koch,et al.  High-energy Kα radiography using high-intensity, short-pulse lasersa) , 2006 .

[17]  C Andersen,et al.  K(alpha) fluorescence measurement of relativistic electron transport in the context of fast ignition. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[18]  Yi Sun,et al.  A new method of image reconstruction with high resolution in x-ray coded aperture imaging , 2005, SPIE Optics + Photonics.

[19]  Richard A. Lerche,et al.  Inertial confinement fusion neutron imagesa) , 2006 .

[20]  R. Stephens,et al.  Effect of target material on fast-electron transport and resistive collimation. , 2013, Physical review letters.

[21]  Fionn Murtagh,et al.  Deconvolution in Astronomy: A Review , 2002 .