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

fYear

1997

fDate

9-15 Nov 1997

Firstpage

755

Abstract

We describe the use of penumbral imaging technique for hard X-ray imaging of laser-imploded targets. The technique uses the facts 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 have been 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

X-ray imaging; plasma diagnostics; plasma inertial confinement; plasma production by laser; X-ray CCD camera; X-ray images; X-ray imaging; aperture function; circular aperture; laser-imploded targets; penumbral aperture; penumbral imaging; power cepstrum; 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1997. IEEE

Conference_Location

Albuquerque, NM

ISSN

1082-3654

Print_ISBN

0-7803-4258-5

Type

conf

DOI

10.1109/NSSMIC.1997.672692

Filename

672692