A number of possible variations to the weapon design have been proposed : Two special variations exist that will be discussed in a subsequent section : the cryogenically cooled liquid deuterium device used for the Ivy Mike test , and the putative design of the W88 nuclear warhead — a small , MIRVed version of the Teller – Ulam configuration with a prolate ( egg or watermelon shaped ) primary and an elliptical secondary
Ivy Mike
Ivy Mike
Thermonuclear weapon