did it have any other code name?
No
Trinity (nuclear test)
The exact origin of the code name "Trinity" for the test is unknown, but it is often attributed to Oppenheimer as a reference to the poetry of John Donne, which in turn references the Christian notion of the Trinity (i.e., the three persons constituting the nature of God).
what is trinity nuclear test? It was the code name of the first detonation of a nuclear device. when did the test start? July 16, 1945.
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Trinity (nuclear test) [SEP] Code name
The exact origin of the code name "Trinity" for the test is unknown, but it is often attributed to Oppenheimer as a reference to the poetry of John Donne, which in turn references the Christian notion of the Trinity (i.e., the three persons constituting the nature of God). In 1962, Groves wrote to Oppenheimer about the origin of the name, asking if he had chosen it because it was a name common to rivers and peaks in the West and would not attract attention, and elicited this reply: