Project Callisto: Null results from a nine-year cold fusion research program

From 2015–2024, more than 100 people contributed to an experimental investigation of cold fusion and anomalous heat in palladium.

We’ve now published the technical reports. Broadly, it covers electrochemical replications of all previous notable experiments, more than 200,000 sample-hours of calorimetry across much wider parameter space, and custom hydrogen-compatible hardware operating at pressures up to 600,000 psi with a wide range of stimulation applied to the material. No evidence of cold fusion was found in the conditions investigated. The landing page provides a summary. The details are in the (quite large) reports of both the electrochemical and ultra pressure reports.

Given the general interest in energy technology here on HN I figured it was appropriate to post.

I was Head of Engineering at Project Callisto during its early years. I left after a set of experiments that I considered definitive returned a null result. The program continued on for several years, exploring a much larger set of conditions. It was a wild ride!