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Problems affecting the fidelity of pressure measuring instruments for planetary probes
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hudson, J. B. |
| Copyright Year | 1972 |
| Description | Determination is made of the nature and magnitude of surface-related effects that cause errors in pressure measuring instruments, with special reference being made to instruments intended for use in planetary probes. The interaction of gases with clean surfaces of metals likely to be used as gage construction materials was studied. Special emphasis was placed on the adsorption, chemical reaction, and electron-induced desorption processes. The results indicated that all metals tested were subject to surface processes which would degrade gage fidelity. It was also found, however, that the formation of inert adsorbed layers on these metal surfaces, such as carbon on platinum, greatly reduced or eliminated these effects. This process, combined with a system design which avoids contact between reactive gases and hot filaments, appears to offer the most promising solution to the gage fidelity problem. |
| File Size | 17817069 |
| Page Count | 502 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730013665 |
| Archival Resource Key | ark:/13960/t7np6tt0g |
| Language | English |
| Publisher Date | 1972-11-01 |
| Access Restriction | Open |
| Subject Keyword | Metal Surfaces Adsorption Platinum Gas Dynamics Space Probes Measuring Instruments Carbon Pressure Gages Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
