Levitation apparatus for structural studies of high temperature liquids using synchrotron radiation

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1148315· OSTI ID:561002

Krishnan, S; Felten, J J; Rix, J E; Weber, J K; Nordine, P C; Beno, M A; Ansell, S; Price, D L ^[1]

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1. Containerless Research, Incorporated, 906 University Place, Evanston, Illinois 60201 (United States)

A new levitation apparatus coupled to a synchrotron-derived x-ray source has been developed to study the structure of liquids at temperatures up to 3000 K. The levitation apparatus employs conical nozzle levitation using aerodynamic forces to stably position solid and liquid specimens at high temperatures. A 270 W CO{sub 2} laser was used to heat the specimens to desired temperatures. Two optical pyrometers were used to record the specimen temperature, heating curves, and cooling curves. Three video cameras and a video recorder were employed to obtain and record specimen views in all three dimensions. The levitation assembly was supported on a three-axis translation stage to facilitate precise positioning of the specimen in the synchrotron radiation beam. The levitation system was enclosed in a vacuum chamber with Be windows, connections for vacuum and gas flow, ports for pyrometry, video, and pressure measurements. The vacuum system included automatic pressure control and multi-channel gas flow control. A phosphor screen coupled to a high-resolution video microscope provided images of the x-ray beam and specimen shadow which were used to establish the specimen position. The levitation apparatus was integrated with x-ray diffractometers located at X-6B and X-25 beamlines at the National Synchrotron Light Source. X-ray structural measurements have been obtained on a number of materials including Al{sub 2}O{sub 3}, Ni, Si, Ge, and other metallic and ceramic materials in the liquid state. {copyright} {ital 1997 American Institute of Physics. }

• DOE Contract Number: FG02-94ER81732
• OSTI ID: 561002
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
LASER RADIATION
LEVITATION
LIQUIDS
PYROMETERS
SYNCHROTRON RADIATION
X-RAY DIFFRACTION
X-RAY DIFFRACTOMETERS