Jano Haley

Jano Haley worked on the Manhattan Project at Los Alamos. He was married to Ruth Haley, who also worked at Los Alamos. He later directed the “Little Boy Replication Project,” which involved putting together the “Comet Assembly Machine.” This machine, also known as Haley’s Comet, was essentially a very small prompt-critical reactor. The goal of the experiment was to determine neutron measurement and better understand radiation exposure from the Little Boy-type bomb. For more information, see Alex Wellerstein’s article, The Hiroshima Do-Over (1963).