Penney was anxious to secure the services of Titterton , who had recently emigrated to Australia , as he had worked on the American Trinity and Crossroads tests . Menzies asked the vice chancellor of the Australian National University , Sir Douglas Copland , to release Titterton to work on Operation Hurricane . Cockcroft also wanted assistance from Leslie Martin , the Department of Defence 's Science Advisor , who was also a professor of physics at the University of Melbourne , to work in the health physics area . The two men knew each other from their time at Cambridge University before the war . After some argument , Martin was accepted as an official observer , as was W. A. S. Butement , the Chief Scientist at the Department of Supply . The only other official observer was Solandt from Canada
Trinity
Trinity (nuclear test)
Operation Hurricane