Washenfelder, R. A. and Roehl, C. M. and McKinney, K. A. and Julian, R. R. and Wennberg, P. O. (2003) A compact, lightweight gas standards generator for permeation tubes. Review of Scientific Instruments, 74 (6). pp. 3151-3154. ISSN 0034-6748 http://resolver.caltech.edu/CaltechAUTHORS:WASrsi03
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A lightweight, compact gas standards generator for permeation tubes is described. This system provides reliable temperature control during periods of intermittent power and is ideal for field measurements. A eutectic alloy with a high heat of fusion is used as a phase change material. This thermal source allows the system to maintain a constant permeation tube temperature of 46.6 °C for over 5 h in the absence of external power. This permeation system is currently being used in an aircraft chemical ionization mass spectrometer to provide HNO3 calibration.
|Additional Information:||©2003 American Institute of Physics. (Received 18 November 2002; accepted 17 February 2003) The authors thank Dana Roth for his assistance in uncovering the history and properties of bismuth alloys. This material is based upon work supported by the National Science Foundation under Grant No. ATM9871353 and the National Aeronautics and Space Administration under Grant No. NAG5-7527.|
|Subject Keywords:||measurement standards; mass spectrometer accessories; aircraft instrumentation; heat of fusion; calibration; thermal stability; porosity|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||06 Oct 2006|
|Last Modified:||26 Dec 2012 09:04|
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