Debris mitigation in pinhole-apertured point-projection backlit imaging

Pinhole-apertured point-projection x-ray radiography is an important diagnostic technique for obtaining high resolution, high contrast, and large field-of-view images used to diagnose the hydrodynamic evolution of high energy density experiments. In this technique, a pinhole aperture is placed betwe...

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Bibliographic Details
Published in:Review of scientific instruments 2004-11, Vol.75 (11), p.4775-4777
Main Authors: Blue, B. E., Hansen, J. F., Tobin, M. T., Eder, D. C., Robey, H. F.
Format: Article
Language:English
Subjects:
APERTURES
BIOMEDICAL RADIOGRAPHY
DIAGNOSTIC TECHNIQUES
ENERGY DENSITY
RADIOLOGY AND NUCLEAR MEDICINE
SPATIAL RESOLUTION
TARGET CHAMBERS
X-RAY RADIOGRAPHY
X-RAY SOURCES
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Summary:Pinhole-apertured point-projection x-ray radiography is an important diagnostic technique for obtaining high resolution, high contrast, and large field-of-view images used to diagnose the hydrodynamic evolution of high energy density experiments. In this technique, a pinhole aperture is placed between a laser irradiated foil (x-ray source) and an imaging detector. In the present geometry, the x rays that are not transmitted through the pinhole aperture, ablate the pinhole substrate’s surface, and turn it into a flyer plate. The pinhole substrate then breaks apart into shrapnel, and that shrapnel can damage diagnostics inside the target chamber. In this letter, we present a technique on mitigating the debris by using a tilted pinhole.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1809288