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Proceedings Paper

Tests of a 200-mhz surface acoustic wave mass monitor in a space environment
Author(s): Donald A. Wallace; Scott A. Wallace; William D. Bowers; Raymond L. Chuan
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Paper Abstract

A surface acoustic wave (SAW) crystal has been tested to demonstrate its usefulness in a space environment. The testing was done in a vacuum space chamber. The temperature of the heat sink on which the SAW was supported was varied over the anticipated temperature range that the SAW would be subjected to in space (from 100 C to LN2 temperature). The repeatability of frequency, the stability of the device and the long term drift were important features of the test. An empirical determination of mass sensitivity (mass/frequency change) of the SAW was accomplished by measuring the water-vapor outgassing rate of the chamber walls with not only the SAW but also a 10-MHz QCM with a known mass sensitivity. This test not only measured the mass sensitivity by comparison but it also allowed the measurement of the linearity of the SAW''s total dynamic range.

Paper Details

Date Published: 1 November 1990
PDF: 11 pages
Proc. SPIE 1329, Optical System Contamination: Effects, Measurement, Control II, (1 November 1990); doi: 10.1117/12.34753
Show Author Affiliations
Donald A. Wallace, QCM Research (United States)
Scott A. Wallace, QCM Research (United States)
William D. Bowers, Femtometrics (United States)
Raymond L. Chuan, Femtrometrics (United States)

Published in SPIE Proceedings Vol. 1329:
Optical System Contamination: Effects, Measurement, Control II
A. Peter M. Glassford, Editor(s)

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