Thermal performance of the ATST secondary mirror
2007
The Advanced Technology Solar Telescope (ATST) has a 4.24m off-axis primary mirror designed to deliver diffractionlimited
images of the sun. Its baseline secondary mirror (M2) design uses a 0.65m diameter Silicon Carbide mirror
mounted kinematically by a bi-pod flexure mechanism at three equally spaced locations. Unlike other common
telescopes, the ATST M2 is to be exposed to a significant solar heat loading. A thermal management system (TMS) will
be developed to accommodate the solar loading and minimize "mirror seeing effect" by controlling the temperature
difference between the M2 optical surface and the ambient air at the site. Thermo-elastic analyses for steady state
thermal behaviors of the ATST secondary mirror was performed using finite element analysis by I-DEAS TM and
PCRINGE TM for the optical analysis. We examined extensive heat transfer simulation cases and their results were
discussed. The goal of this study is to establish thermal models by I-DEAS for an adequate thermal environment. These
thermal models will be useful for estimating segment thermal responses. Current study assumes a few sample time
dependent thermal loadings to synthesize the operational environment.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
0
References
3
Citations
NaN
KQI