L3-CRY-COOL-PT
ESSENTIAL
PRESERVATION
Level 3 · hardware
Pulse Tube Cryocooler
Coaxial Pulse Tube Refrigerator for Pre-Cooling Stage
Pulse tube cooler providing intermediate cooling stage with zero moving parts at cold end
Purpose
Pulse tube cooler providing intermediate cooling stage with zero moving parts at cold end
Context
Child of L2-CRY-COOL
Principles
- ▸Pulse tube has NO moving parts at cold end - ultimate reliability for cold-end components
- ▸Inertance tube and reservoir replace displacer providing acoustic power phasing
- ▸Typically used as pre-cooling stage from 300K to ~80K before Stirling final stage
- ▸Lower efficiency than Stirling but compensated by extreme reliability
Typical implementations
- ▸NIST pulse tube cryocooler research and development
- ▸Lockheed Martin MIRI precooler (JWST) pulse tube technology
- ▸Cryomech PT415 pulse tube cooler (commercial)
- ▸Air Liquide pulse tube coolers for space infrared detectors
Lunar considerations
- ▸Pre-cooling stage reduces thermal load on primary Stirling cryocoolers
- ▸No cold-end vibration ideal for sensitive sample storage areas
- ▸Pulse tube orientation sensitivity reduced in 1/6g vs. Earth gravity
- ▸Can serve as backup cooling if primary Stirling fails
Specifications
Functional
| primary function | Pulse tube cooler providing intermediate cooling stage with zero moving parts at cold end |
Physical
| materials | Stainless steel pulse tube, Copper heat exchangers, Stainless steel regenerator screens |
Interfaces
Provides
- Pre-cooled thermal stage reducing Stirling load
Requires
- Electrical power for compressor (~200W)
Cite this entry
Lunar Ark Codex. "Pulse Tube Cryocooler" (L3-CRY-COOL-PT). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-CRY-COOL-PT
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.