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WebbUpdateSummer2016
WebbUpdateSummer2016
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James Webb Space Telescope<br />
In addition to this new thermal GSE, the Pathfinder<br />
payload itself has been substantially modified for<br />
the TPF run. Previously, the bare Pathfinder structure,<br />
emulating the central section of the telescope<br />
backplane (i.e. minus the wings), carried only two<br />
spare Primary Mirror Segment Assemblies. For the<br />
Thermal Pathfinder test, that entire center section<br />
Issue #20, Summer 2016<br />
is populated, with ten additional dummy Primary<br />
Mirror Segments – those dummy segments are made<br />
of honeycomb aluminum and coated with gold, like<br />
the real flight mirrors. The structure is then closed out<br />
with thermal blankets in a flight-like way, so that the<br />
thermal properties closely mimic those of the flight<br />
system.<br />
Figure 2. Photograph of the actual TPF thermal GSE, including the DSERS and IEC enclosure.<br />
Credit: Jesse Huguet<br />
jwst.nasa.gov<br />
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