21 lines
968 B
Markdown
21 lines
968 B
Markdown
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# MEMORY.md — Webster's Long-Term Memory
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## Material Properties
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- **Zerodur**: Density is 2.53 g/cm³, Thermal Conductivity is 1.46 W/(m·K), Poisson's Ratio is 0.243.
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- **Clearceram-Z**: CTE is 0.02 μstrain/°C (-60 to 160 °C), Density is 2.55 g/cm³. Note: Standard grade, not HS.
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- **Clearceram-Z HS**: CTE is 0.0 ± 0.2 x 10⁻⁷ /°C, Density is 2.55 g/cm³.
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- **Corning ULE 7972**: CTE is 0 ± 30 ppb/°C (5-35°C).
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- **Invar 36**: Young's Modulus is ~141 GPa (annealed).
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## Research Summaries
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- **Clearceram-Z HS vs. Zerodur for Large Mirrors**: Both are top-tier materials. Zerodur has extensive flight heritage (VLT, Keck) and a deeply characterized CTE. Clearceram-Z HS shows potentially superior stability under thermal cycling and was chosen for the TMT, making it a strong choice for next-generation ground-based telescopes where this is critical.
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---
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## Initialized
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- 2026-02-13: Webster workspace created for Atomizer-HQ Discord deployment
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