HR001125S0004_QuSeN_Amendment_2_Summary_of_Changes.docx

This is Amendment 2 to the Quantum Sensing of Neutrinos (QuSeN) Broad Agency Announcement (BAA) HR001125S0004, which extends the proposal due date to January 23, 2025. No other changes were made to the original BAA.

The underlying opportunity, managed by the Defense Advanced Research Projects Agency (DARPA), seeks proposals for developing revolutionary high-sensitivity neutrino detectors. The program aims to detect neutrinos from nuclear reactors and materials using neutrino-matter interactions that produce low-energy nuclear recoils and athermal phonons in absorber materials at the multi-kilogram scale. Funding will be provided through cooperative agreements and procurement contracts under the Research and Technology Development program (CFDA 12.910). Evolutionary improvements to existing technology are specifically excluded from consideration.