Title :
Penumbral imaging of laser-imploded targets and its blind reconstruction
Author :
Chen, Y.-W. ; Kodama, R. ; Nakao, Z.
Author_Institution :
Fac. of Eng., Ryukyus Univ., Okinawa, Japan
fDate :
6/1/1998 12:00:00 AM
Abstract :
We describe a use of the penumbral imaging technique for hard X-ray imaging of laser-imploded targets. The technique uses the fact that spatial information can be recovered from the shadow or penumbra that an unknown source casts through a simple large circular aperture. The imaging system consists of a large circular aperture (penumbral aperture), filters, and a sensitive X-ray CCD camera as a detector. The X-ray images with photon energies of 5 keV and 10 keV to 30 keV were obtained. We also propose a new reconstruction method based on power cepstrum of the penumbral image, which does not require exact information about the aperture function
Keywords :
CCD image sensors; X-ray detection; X-ray imaging; fusion reactor ignition; fusion reactor instrumentation; image reconstruction; plasma inertial confinement; plasma production by laser; 10 to 30 keV; 5 keV; ICF; X-ray CCD camera; X-ray images; blind reconstruction; hard X-ray imaging; inertial confinement fusion; large circular aperture; laser-imploded targets; penumbral imaging technique; power cepstrum; reconstruction method; spatial information; Apertures; Charge coupled devices; Charge-coupled image sensors; Filters; Optical imaging; Reconstruction algorithms; X-ray detection; X-ray detectors; X-ray imaging; X-ray lasers;
Journal_Title :
Nuclear Science, IEEE Transactions on
