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A new approach for performing contamination control bakeouts in jpl thermal vacuum test chambers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Taylor, Daniel M. Anderson, Mark R. Lane, Robert W. Cortez, Maximo G. Johnson, Kenneth R. |
| Copyright Year | 1992 |
| Description | Contamination control requirements for the Wide Field/Planetary Camera II (WF/PC II) are necessarily stringent to protect against post-launch contamination of the sensitive optical surfaces, particularly the cold charge coupled device (CCD) imaging surfaces. Typically, thermal vacuum test chambers have employed a liquid nitrogen (LN2) cold trap to collect outgassed contaminants. This approach has the disadvantage of risking recontamination of the test article from shroud offgassing during post-test warmup of the chamber or from any shroud warming of even a few degrees during the bakeout process. By using an enclave, essentially a chamber within a chamber, configured concentrically and internally within an LN2 shroud, a method was developed, based on a design concept by Taylor, for preventing recontamination of test articles during bakeouts and subsequent post-test warmup of the vacuum chamber. Enclaves for testing WF/PC II components were designed and fabricated, then installed in three of JPL's Environmental Test Lab chambers. The design concepts, operating procedures, and test results of this development are discussed. |
| File Size | 514631 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930006429 |
| Archival Resource Key | ark:/13960/t1mh2j171 |
| Language | English |
| Publisher Date | 1992-11-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Design, Testing And Performance Charge Coupled Devices Degassing Thermal Vacuum Tests Vacuum Chambers Test Chambers Shrouds Environmental Tests Optical Equipment Contamination Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
