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Apparatus to measure the decay of the free neutron. The experiment was designed by Luis Alvarez and was built and tested by Cornelius Tobias for his doctoral thesis in 1941. The project was stopped when the 37-inch cyclotron was converted to isotope separation. Photo taken May 2, 1941. Morgue 1946-8 (P-16); Cooksey 454 [Photographer: Donald Cooksey]

S04-47-1960 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1961 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1962 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1963 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1964 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1965 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1966 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1967 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1968 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1969 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

AS11-44-6599 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6597 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6594 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6596 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6568 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6567 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6576 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6587 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6591 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6583 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6579 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6578 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6593 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6574 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6566 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6575 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6580 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6589 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6600 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6598 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6584 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6582 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6577 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6590 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6592 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6569 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6588 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6573 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6570 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6571 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6565 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6572 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6586 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6581 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6595 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

AS11-44-6585 - Apollo 11 - Apollo 11 Mission image - View of Lunar Module separation from the Command Module

S04-47-1970 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1971 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1972 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1973 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1974 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1975 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1976 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1977 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1978 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S04-47-1979 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

BLADE SEPARATION PROBE

S04-47-1980 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S02-500-924 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-903 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-957 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-917 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-930 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-962 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-956 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-932 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-939 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-931 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-923 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-951 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-960 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-935 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-911 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-936 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S04-47-1981 - STS-004 - View of the External Tank after separation from orbiter Columbia during the STS-4 mission

S02-500-959 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-922 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-940 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-958 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-921 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-920 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-915 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-905 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-963 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-907 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-954 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-943 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-944 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-946 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-912 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-904 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-910 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-919 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-949 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-928 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-950 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-961 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-908 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission

S02-500-952 - STS-002 - View of the External Tank after separation from Columbia during the STS-2 mission