Thermal Isolation Strap
Low-Conductance Composite Isolation Strap
A low-conductance composite isolation strap is a 2 kg passive structural element made of G10 fiberglass and titanium 6Al-4V that mechanically secures cold-stable assemblies while limiting conductive heat leak to 0.1 W per strap. In lunar applications, cryocooler cold fingers and cryogenic instruments must remain thermally decoupled from warm support structures despite ambient 300 K temperature swings and 14-day diurnal cycles. Utilizing composite I-beam profiles, the strap provides the load-bearing strength necessary to anchor cryogenic hardware in 1/6 g while resisting thermal transfer, maintaining structural integrity across a 100-year operational lifetime.
Low-conductance composite isolation straps (G10 fiberglass, titanium) thermally isolating cold-stable assemblies from warm support structure.
Purpose
Low-conductance composite isolation straps (G10 fiberglass, titanium) thermally isolating cold-stable assemblies from warm support structure.
Context
Child of L2-PTC-STRUC within the Lunar Ark system
Principles
- ▸G10 fiberglass: very low thermal conductivity
- ▸Titanium: low conductance + high strength
- ▸Used to isolate cryocooler cold finger from structure
- ▸Mechanical strength maintained while limiting heat leak
- ▸Long-life solid materials
Typical implementations
- ▸Cryogenic instrument supports (JWST)
- ▸Aerospace cold-end isolation
- ▸Industrial cryostat supports
Lunar considerations
- ▸100-year structural integrity
- ▸Coupling with L3-PTC-HPIPE for transport from cold load
- ▸Replaceable in module-swap context
Specifications
Functional
| primary function | Low-conductance composite isolation straps (G10 fiberglass, titanium) thermally isolating cold-stable assemblies from warm support structure. |
| heat leak w per strap | 0.1 |
Physical
| mass kg | 2 |
| materials | G10 fiberglass, Titanium 6Al-4V, Composite I-beam profiles |
| vacuum compatibility | True |
Operational
| power consumption w | 0 |
| thermal range c | -40, 70 |
| lifetime years | 100 |
| mtbf hours | 1000000 |
Interfaces
Provides
- Cold-finger structural isolation
- Clock isolation from warm electronics
Requires
- Foundation mounting
Cite this entry
Lunar Ark Codex. "Thermal Isolation Strap" (L3-PTC-STRUC-ISO). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-PTC-STRUC-ISO
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.