right|600px|thumb|left to right: apparition of bubble; slow expansion; quick and sudden contraction; purported fusion event.bubble fusion, also known as sonofusion, is the non-technical name for a nuclear fusion reaction hypothesized to occur inside extraordinarily large collapsing gas bubbles created in a liquid during acoustic cavitation. rusi taleyarkhan and collaborators claimed to have observed evidence of sonofusion in 2002. the claim was quickly surrounded by controversy, including allegations ranging from experimental error to academic fraud. subsequent publications claiming independent verification of sonofusion were also highly controversial. eventually, an investigation by purdue university found that taleyarkhan had engaged in falsification of independent verification, and had included a student as an author on a paper when he hadn't participated in the research. he was subsequently stripped of his professorship. one of his funders, the office of naval research reviewed the report by purdue and barred him from federal funding for 28 months. == original experiments == thumb|right|300px|sonofusion device used by rusi taleyarkhan. 1. vacuum pump 2. liquid scintillator 3. neutron source 4. acoustic wave generator 5. test chamber with fluid 6. microphone 7. photomultiplier tube 8. two deuterium atoms collide 8a. possible fusion event creating helium and a neutron 8b. possible fusion event creating tritium and a protonus patent 4,333,796, filed by hugh flynn in 1978, appears to be the earliest documented reference to a sonofusion-type reaction. in the march 8, 2002 issue of the peer-reviewed journal science, rusi p. taleyarkhan and colleagues at the oak ridge national laboratory (ornl) reported that acoustic cavitation experiments conducted with deuterated acetone () showed measurements of tritium and neutron output consistent with the occurre
Cold_fusion Fusion_power Nuclear_fusion