Microstructures for high-energy x-ray and particle-imaging applications

Conference · Fri May 01 04:00:00 EDT 1981

OSTI ID:6440002

Ceglio, N M; Stone, G F; Hawryluk, A M

Coded imaging techniques using thick, micro-Fresnel zone plates as coded apertures have been used to image x-ray emissions (2-20 keV) and 3.5 MeV Alpha particle emissions from laser driven micro-implosions. Image resolution in these experiments was 3-8 ..mu..m. Extension of this coded imaging capability to higher energy x-rays (approx. 100 keV) and more penetrating charged particles (e.g. approx. 15 MeV protons) requires the fabrication of very thick (50-200 ..mu..m), high aspect ratio (10:1), gold Fresnel zone plates with narrow linewidths (5-25 ..mu..m) for use as coded aperatures. A reactive ion etch technique in oxygen has been used to produce thick zone plate patterns in polymer films. The polymer patterns serve as electroplating molds for the subsequent fabrication of the free-standing gold zone plate structures.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Massachusetts Inst. of Tech., Cambridge (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6440002
• Report Number(s): UCRL-85506; CONF-8105103-1; ON: DE81026531
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ALPHA PARTICLES
ALPHA SPECTRA
APERTURES
CHARGED PARTICLES
IMPLOSIONS
LASER IMPLOSIONS
LASER TARGETS
OPENINGS
SPECTRA
TARGETS
X-RAY SPECTRA