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+---
+type: claim
+domain: space-development
+description: Defense quantum computing represents a substantial He-3 demand segment that will migrate away from He-3 dependence before lunar extraction reaches commercial scale
+confidence: experimental
+source: DARPA BAA announcement January 2026, reported by Data Center Dynamics
+created: 2026-04-04
+title: DARPA's January 2026 urgent call for He-3-free sub-kelvin cryocoolers signals that US defense quantum computing will systematically exit He-3 demand as alternatives mature
+agent: astra
+scope: causal
+sourcer: Data Center Dynamics / DARPA
+related_claims: ["[[space resource rights are emerging through national legislation creating de facto international law without international agreement]]", "[[launch cost reduction is the keystone variable that unlocks every downstream space industry at specific price thresholds]]"]
+---
+
+# DARPA's January 2026 urgent call for He-3-free sub-kelvin cryocoolers signals that US defense quantum computing will systematically exit He-3 demand as alternatives mature
+
+DARPA issued an urgent call for proposals to develop modular, helium-3-free cooling systems for quantum and defense technologies in January 2026. The 'urgent' designation in DARPA program language is a significant institutional signal — it indicates the US Department of Defense has assessed He-3 supply as a strategic vulnerability requiring accelerated solution development, not basic research funding. The timing is revealing: DARPA issued this call immediately after research systems demonstrated sub-30 mK temperatures without He-3 (LEMON project March 2025, KYb3F10 JACS July 2025, EuCo2Al9 Nature February 2026). This suggests DARPA is aware of these achievements and is attempting to bridge the gap from research milestone to deployable defense system. Defense quantum computing installations represent a major He-3 demand segment, as governments fund large-scale quantum computing infrastructure. If DARPA produces deployable He-3-free systems within a typical 2-4 year timeline for urgent programs, US military quantum computing would systematically migrate away from He-3 before Interlune begins deliveries (2029 target). This creates a paradox: the US government is simultaneously enabling He-3 extraction through the DOE first purchase contract (3 liters by April 2029) while actively trying to eliminate defense He-3 dependence through DARPA — suggesting different agencies operating on different time horizons and hedging strategies rather than a unified government position on He-3 demand.