TPF-C Technology Plan - Exoplanet Exploration Program - NASA
TPF-C Technology Plan - Exoplanet Exploration Program - NASA
TPF-C Technology Plan - Exoplanet Exploration Program - NASA
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Plan</strong> for <strong>Technology</strong> Development<br />
7.4.7 Coatings<br />
Scope<br />
In order to achieve TRL 6 at the end of Phase B, we will progress through a series of steps from<br />
identification of suitable designs and confirmation of their performance on small parts (“witness<br />
samples”), to developing the processes for coating on large scales (for the primary and secondary<br />
mirrors) and confirmation of performance using the TDM as a large test system. In addition, test<br />
coatings for all optics throughout <strong>TPF</strong>-C and confirmation of their properties on witness samples<br />
will be demonstrated to ensure their performance conforms to the established requirements. The<br />
coatings have achieved TRL 3.The schedule for coatings work is given in Table 7-8.<br />
Table 7-8. Coatings Schedule<br />
<strong>Plan</strong>ned<br />
Completion<br />
Date<br />
<strong>Plan</strong>ned Activities Performance Targets TRL<br />
Pre-Phase<br />
A<br />
Design of critical coatings<br />
Sensitivity analysis of coating<br />
performance<br />
Measurement of small samples confirm<br />
design performance<br />
Initiate lifetime measurements<br />
Input to definition of TDM coating<br />
requirements & process<br />
Nominal designs for all optics completed<br />
Small samples of critical coatings meet<br />
required performance<br />
1-3<br />
Phase A<br />
Define tests to be used on large optics to<br />
confirm performance<br />
Test coatings for TDM<br />
Test sample coatings for all components<br />
to confirm performance<br />
TDM coating performance meets or exceeds<br />
requirements<br />
Samples of all critical coatings meet or exceed<br />
performance requirements<br />
4-6<br />
117