25 October 1999 Quartz crystal particle microbalance (QCPM)
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The QCPM has been developed to monitor particulate contamination in a space environment. The QCPM is similar in design to a TQCM in that it uses a thermoelectric device to control temperature and In Line Doublet Crystals to maintain frequency stability under solar radiation. The QCPM is coated with a thin layer of a vacuum fluid having a very low vapor pressure. At 0 degrees Celsius, the fluid is in a viscous liquid state and particles that fall onto the QCPM stick to its surface. Periodically, the particles are weighed by cooling the QCPM to -60 degrees Celsius to solidify the fluid and couple the particulates to the oscillator mass of the crystal. The results from a Scanning Electron Microscope and the Energy Dispersions Analysis by X-ray are presented showing the size, shape and composition of particles that contaminated surfaces flown on the Spacelab 1 Mission. Aluminum particles occurred in the greatest numbers and had diameters ranging between 0.5 to 10 micrometer.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel McKeown, Daniel McKeown, William E. Corbin, William E. Corbin, Marvin G. Fox, Marvin G. Fox, } "Quartz crystal particle microbalance (QCPM)", Proc. SPIE 3784, Rough Surface Scattering and Contamination, (25 October 1999); doi: 10.1117/12.366689; https://doi.org/10.1117/12.366689

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