Document Type
Article
Publication Date
9-2005
Abstract
Emission time-of-flight (TOF) profiles have been obtained using gated imagery to further the process control during the pulsed laser deposition of the high temperature superconductor, YBa2Cu3O7−x. An intensified charge coupled device array was used to obtain a sequence of plume images at 10ns temporal resolution and 0.2mm spatial resolution. Plume imagery is transformed to TOF profiles and pulse-to-pulse variations removed using physically based smoothing techniques. Comparison with non-imaging sensors establishes excellent agreement, with systematic uncertainties in streaming speed and temperatures of less than 15% and 8%, respectively. The resulting streaming speeds of 0.4–1.2×106 cm/s and characteristic temperatures of 20000–200000K are characterized across the full plume. This new imaging TOF technique enables the monitoring of the complete evolution of speed distributions. Indeed, significant deviations from the forward-directed Maxwellian speed distributions are observed.
Source Publication
Review of Scientific Instruments
Recommended Citation
Carl J. Druffner, Glen P. Perram, Rand R. Biggers; Time-of-flight emission profiles of the entire plume using fast imaging during pulsed laser deposition of YBa2Cu3O7−x . Rev Sci Instrum 1 September 2005; 76 (9): 093101. https://doi.org/10.1063/1.2018503
Comments
© 2005 AIP Publishing LLC, published under an exclusive license with American Institute of Physics.
AFIT Scholar, as the repository of the Air Force Institute of Technology, furnishes the published Version of Record for this article in accordance with the sharing policy of the publisher, AIP Publishing. A 12-month embargo was observed.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Review of Scientific Instruments 76, 093101 as fully cited below and may be found at DOI: 10.1063/1.2018503.