Debris mitigation in pinhole-apertured point-projection backlit imaging

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1809288· OSTI ID:20644012

Blue, B E; Hansen, J F; Tobin, M T; Eder, D C; Robey, H F ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

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.

• OSTI ID: 20644012
• Journal Information: Review of Scientific Instruments, Vol. 75, Issue 11; Other Information: DOI: 10.1063/1.1809288; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
APERTURES
BIOMEDICAL RADIOGRAPHY
DIAGNOSTIC TECHNIQUES
ENERGY DENSITY
IMAGES
SPATIAL RESOLUTION
TARGET CHAMBERS
X-RAY RADIOGRAPHY
X-RAY SOURCES