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The original uranium and graphite used by Dr. Enrico Fermi and his associates in the world's first nuclear reactor have been used in this exponential assembly or subcritical reactor recently constructed at Argonne National Laboratory. The exponential assembly is an eight-foot cube which contains 30 tons of graphite into which 2-1/2 tons of uranium have been placed in accordance with a pre-determined lattice-type arrangement. By measuring the amount of induced radiation in indium foils placed in the reactor (as demonstrated by Vincent H. Shoemaker), it is possible to obtain information needed for the design of full-scale reactors.  The original reactor, after its initial operation at West Stands, Stagg Field, University of Chicago, was dismantled and reassembled at a remote site southwest of Chicago where it contributed useful information to the atomic energy program for more than a decade. In 1955, it was again dismantled and much of its uranium and graphite have been used in the construction of this exponential assembly. Apr 9, 1956 (Tribune File Photo, baiduhai) ...OUTSIDE TRIBUNE CO.- NO MAGS,  NO SALES, NO INTERNET, NO TV, CHICAGO OUT, NO DIGITAL MANIPULATION...
The original uranium and graphite used by Dr. Enrico Fermi and his associates in the world’s first nuclear reactor have been used in this exponential assembly or subcritical reactor recently constructed at Argonne National Laboratory. The exponential assembly is an eight-foot cube which contains 30 tons of graphite into which 2-1/2 tons of uranium have been placed in accordance with a pre-determined lattice-type arrangement. By measuring the amount of induced radiation in indium foils placed in the reactor (as demonstrated by Vincent H. Shoemaker), it is possible to obtain information needed for the design of full-scale reactors. The original reactor, after its initial operation at West Stands, Stagg Field, University of Chicago, was dismantled and reassembled at a remote site southwest of Chicago where it contributed useful information to the atomic energy program for more than a decade. In 1955, it was again dismantled and much of its uranium and graphite have been used in the construction of this exponential assembly. Apr 9, 1956 (Tribune File Photo, baiduhai) …OUTSIDE TRIBUNE CO.- NO MAGS, NO SALES, NO INTERNET, NO TV, CHICAGO OUT, NO DIGITAL MANIPULATION…
ADVANCE FOR SUNDAY, DEC. 26 - FILE - The west stands of Stagg Field at the University of Chicago are seen in this mid-1940s file photo. It was in a secret laboratory under the stands that physicist Enrico Fermi and a team of scientists achieved the first controlled and self-sustained nuclear reaction that led humanity into the Nuclear Age. That work was was chosen as the top Illinois news story of the 20th century by Associated Press member newspaper editors and broadcasters. (AP Photo/Argonne NationalLaboratory)  ORG XMIT: CX603
ADVANCE FOR SUNDAY, DEC. 26 – FILE – The west stands of Stagg Field at the University of Chicago are seen in this mid-1940s file photo. It was in a secret laboratory under the stands that physicist Enrico Fermi and a team of scientists achieved the first controlled and self-sustained nuclear reaction that led humanity into the Nuclear Age. That work was was chosen as the top Illinois news story of the 20th century by Associated Press member newspaper editors and broadcasters. (AP Photo/Argonne NationalLaboratory) ORG XMIT: CX603
Enrico Fermi in his early days at the University of Chicago.
Enrico Fermi in his early days at the University of Chicago.
The first pile scientists at the University of Chicago on Dec. 2, 1946, the fourth anniversary of their success. Back row, left to right, Norman Hilberry, Samuel Allison, Thomas Brill, Robert G. Nobles, Warren Nyer and Marvin Wilkening. Middle row, Harold Agnew, William Sturm, Harold Lichtenberger, Leona W. Marshall and Leo Szilard. Front row, Enrico Fermi, Walter H. Zinn, Albert Wattenberg and Herbert L. Anderson.
The first pile scientists at the University of Chicago on Dec. 2, 1946, the fourth anniversary of their success. Back row, left to right, Norman Hilberry, Samuel Allison, Thomas Brill, Robert G. Nobles, Warren Nyer and Marvin Wilkening. Middle row, Harold Agnew, William Sturm, Harold Lichtenberger, Leona W. Marshall and Leo Szilard. Front row, Enrico Fermi, Walter H. Zinn, Albert Wattenberg and Herbert L. Anderson.
Louis Slotin, research assistant in the physics lab at the University of Chicago, on Jan. 13, 1941. Slotin was testing the 8,000,000 volt cyclotron at the University in preparation for a laboratory demonstration. The 80 ton machine will be used to create artificially radioactive substances which will be employed as “tracers” in treating cancer in blood forming organs.
Louis Slotin, research assistant in the physics lab at the University of Chicago, adjusts an attachment on the cyclotron on Jan. 13, 1941. Slotin was testing the 8,000,000 volt cyclotron at the University in preparation for a laboratory demonstration. The 80 ton machine will be used to create artificially radioactive substances which will be employed as “tracers” in treating cancer in blood forming organs.
Standing on a rug that made history in the Orient centuries ago, the modern history makers, the Atomic bomb scientists, are decorated by Major Gen. Leslie R. Groves, left, with the medal of merit on March 20, 1946, at the University of Chicago Oriental Institute in Chicago. The scientists are, from left, Dr. Harold C. Urey, Dr. Enrico Fermi, getting pinned, Dr. Samuel K. Allison, Dr. Cyril Smith and Dr. Robert S. Stone. (Joe Migon / baiduhai) acetate negative, box 1179.
Standing on a rug that made history in the Orient centuries ago, the modern history makers, the Atomic bomb scientists, are decorated by Major Gen. Leslie R. Groves, left, with the medal of merit on March 20, 1946, at the University of Chicago Oriental Institute in Chicago. The scientists are, from left, Dr. Harold C. Urey, Dr. Enrico Fermi, getting pinned, Dr. Samuel K. Allison, Dr. Cyril Smith and Dr. Robert S. Stone. (Joe Migon / baiduhai) acetate negative, box 1179.
Joe Lillie, of 7714 S. Rhodes, does a dangerous job of machining uranium on lathe for the plutonium project on July 3, 1946, at the University of Chicago. (Frank Berger / baiduhai) acetate negative, box 1179.  ATOM
Joe Lillie, of 7714 S. Rhodes, does a dangerous job of machining uranium on lathe for the plutonium project on July 3, 1946, at the University of Chicago. (Frank Berger / baiduhai) acetate negative, box 1179. ATOM
Dr. Enrico Fermi demonstrates his neutron velocity selector to Dr. Walter H. Zinn between sessions of a meeting of the Argonne National Laboratory on Dec. 2, 1946, commemorating the initial operation of the first self-sustainig nuclear chain reaction. The meeting took place at the Museum of Science.
Dr. Enrico Fermi demonstrates his neutron velocity selector to Dr. Walter H. Zinn between sessions of a meeting of the Argonne National Laboratory on Dec. 2, 1946, commemorating the initial operation of the first self-sustainig nuclear chain reaction. The meeting took place at the Museum of Science.
Technician Dorothy Qutt, of 4850 Greenwood, tests the hand counter for a plutonium project at the University of Chicago on July 3, 1946. (Frank Berger / baiduhai) acetate negative, box 1179. ATOM
Technician Dorothy Qutt, of 4850 Greenwood, tests the hand counter for a plutonium project at the University of Chicago on July 3, 1946. (Frank Berger / baiduhai) acetate negative, box 1179. ATOM
Dr. E. M. K. Geiling injects radioactive carbon dioxide into plants at the University of Chicago on April 7, 1949. (Arnold Tolchin / Chicago Herald American) acetate negative, box 1179.
Dr. E. M. K. Geiling injects radioactive carbon dioxide into plants at the University of Chicago on April 7, 1949. (Arnold Tolchin / Chicago Herald American) acetate negative, box 1179.
Dr. Harvey Patt, of the Argonne National Lab, conducts test for radiation sickness on May 18, 1949, at the University of Chicago. (Heberg / Chicago Herald American) acetate negative, box 1179. ATOM
Dr. Harvey Patt, of the Argonne National Lab, conducts test for radiation sickness on May 18, 1949, at the University of Chicago. (Heberg / Chicago Herald American) acetate negative, box 1179. ATOM
Dr. Earl A. Evans Jr. places the enzyme plus isotope solution in water thermostat, the water at body temperature, on July 10, 1946, at the University of Chicago. (Rising / Chicago Herald American) ATOM ATOMIC AGE
Dr. Earl A. Evans Jr. places the enzyme plus isotope solution in water thermostat, the water at body temperature, on July 10, 1946, at the University of Chicago. (Rising / Chicago Herald American) ATOM ATOMIC AGE
Part of the Cyclotron, a 2073 ton magnet, is brought on a trailer to the basement of the Accelerator Building at the University of Chicago on Sept. 24, 1948, at 56th and Ellis Avenue. (Frank Berger / Chicago Herald American) acetate negative, box 1179.
Part of the Cyclotron, a 2073 ton magnet, is brought on a trailer to the basement of the Accelerator Building at the University of Chicago on Sept. 24, 1948, at 56th and Ellis Avenue. (Frank Berger / Chicago Herald American) acetate negative, box 1179.
Part of the Cyclotron, a 2073 ton magnet, is brought on a trailer to the basement of the Accelerator Building at the University of Chicago on Sept. 24, 1948, at 56th and Ellis Avenue. (Frank Berger / Chicago Herald American) acetate negative, box 1179.
Part of the Cyclotron, a 2073 ton magnet, is brought on a trailer to the basement of the Accelerator Building at the University of Chicago on Sept. 24, 1948, at 56th and Ellis Avenue. (Frank Berger / Chicago Herald American) acetate negative, box 1179.
Mr. Richard H. Templeton and his son Richard III look at the immensity of the new University of Chicago atom smasher, or cyclotron, on Nov. 14, 1948.
Mr. Richard H. Templeton and his son Richard III look at the immensity of the new University of Chicago atom smasher, or cyclotron, on Nov. 14, 1948.
Looking over the $2,200,00 dollar Synchrocyclotron at the Accelerator Building at the University of Chicago is, from left, Solomon Smith of Northern Trust Co., Joseph Capps, Harold Swift, the chairman of board at Swift and Co.; Merle J. Trees of the Chicago Bridge Co., Edward Ryerson, chairman of board at Inland Steel Co., and Leroy Schwarcz, enginner on ladder, on Oct. 28, 1949. (Howard Borvig / baiduhai) acetate negative, box 1179.
Looking over the $2,200,00 dollar Synchrocyclotron at the Accelerator Building at the University of Chicago is, from left, Solomon Smith of Northern Trust Co., Joseph Capps, Harold Swift, the chairman of board at Swift and Co.; Merle J. Trees of the Chicago Bridge Co., Edward Ryerson, chairman of board at Inland Steel Co., and Leroy Schwarcz, enginner on ladder, on Oct. 28, 1949. (Howard Borvig / baiduhai) acetate negative, box 1179.
Dr. Samuel K. Allison, director of the Institute of Nuclear Studies at the University of Chicago, is shown in the laboratory with a Kevatron, a Cockcraft-Walton circuit machine for high-voltage studies on Oct. 21, 1949. Allison was at the first atom bomb testing at Alamagordo (sp?). (Joe Mignon / baiduhai) acetate negative, box 1179.
Dr. Samuel K. Allison, director of the Institute of Nuclear Studies at the University of Chicago, is shown in the laboratory with a Kevatron, a Cockcraft-Walton circuit machine for high-voltage studies on Oct. 21, 1949. Allison was at the first atom bomb testing at Alamagordo (sp?). (Joe Mignon / baiduhai) acetate negative, box 1179.
John Marshall, assistant professor of physics at the University of Chicago, is shown with the completed synchro-cyclotron, the most powerful known, on May 15, 1951. The $2,500,000 device accelerates protons, up to energies of 450 million electron volts.
John Marshall, assistant professor of physics at the University of Chicago, is shown with the completed synchro-cyclotron, the most powerful known, on May 15, 1951. The $2,500,000 device accelerates protons, up to energies of 450 million electron volts.
The $11 million Institute for Nuclear Studies opened on May 16, 1951, at the University of Chicago. Pictured are, front row from left, T.H. Davies, Samuel K. Allison, Navy Adm. Thorwald Solberg, Lawrence Kimpton, cutting ribbon, M. J. Kelly, Enrico Fermi, Army Gen. David M. Schlatter, Cryil S. Smith and Robert Wilson, of Standard Oil; back row, from left, are, Carid Bell, Thorfin Hogness and Monroe Spaght.
The $11 million Institute for Nuclear Studies opened on May 16, 1951, at the University of Chicago. Pictured are, front row from left, T.H. Davies, Samuel K. Allison, Navy Adm. Thorwald Solberg, Lawrence Kimpton, cutting ribbon, M. J. Kelly, Enrico Fermi, Army Gen. David M. Schlatter, Cryil S. Smith and Robert Wilson, of Standard Oil; back row, from left, are, Carid Bell, Thorfin Hogness and Monroe Spaght.
Enrico Fermi at the controls of a 100 million-volt betatron at the University of Chicago on May 2, 1950.
Enrico Fermi at the controls of a 100 million-volt betatron at the University of Chicago on May 2, 1950.
Arthur Compton, chancellor of Washington University, listens to Enrico Fermi, builder of the first atomic pile, as he speaks at the 10th anniversary of the Atomic Age at the University of Chicago on Dec. 2, 1952.
Arthur Compton, chancellor of Washington University, listens to Enrico Fermi, builder of the first atomic pile, as he speaks at the 10th anniversary of the Atomic Age at the University of Chicago on Dec. 2, 1952.