contractors, The XW-7/Corporal received six successful flight tests at White Sands, New Mexico, and the warhead installation was released to production on August 28, 1952,. looking toward initial delivery to stockpile in June 1953. The XW-5/Regulus received a first flight test in August and a second in November at the Naval Air Missile Testing Center, Point Mugu, California, The XW-7/Honest John was first tested in November 1952 at white Sands, New Mexico, and the first test of the XW-5/Matador is scheduled for December 1952, 35. AEC work on adapting assemblies to werhead use in missiles and rockets is centered at Sandia Laboratory. A large outdoor centrifuge at Sandia and a rocket-propelled sled moving on a track, at Holloman Air Force Base, New Mexico, are being used to Simulate the high accelerations encountered in rocket propelled devices. DOE ARCHIVES Initiator Development 36. New concepts are being studied that might increase the yield of inplosion weapons and also reduce present costly initia-~ tor requirements, Among these are the external initiator, tested at Nevada in June 1952. Sone success was achieved with the exter- nai tbetatron initiator, altnough the period of delay in initiating the nuclear reaction in this particular test shot wes not as great - as desired, with the result that the increase in yield was less than 4s believed possible by this method. Studies are teing made of the feasibility of achieving similer effects throuzh mcea@ificaLt ee ER Rem EER tt Atae . FO 28 of