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Radio arc transmitter. Not part of magnet as assembled at University of California (UC) Berkeley taken June 3, 1931. Morgue 1944-79 (P-2) copy negative from original print courtesy of Norma Sleeman [photographer unknown]

Bill Stamper with 27-inch cyclotron tank #1 and magnet, 1932. [Photographer: Donald Cooksey]

27-inch cyclotron with magnet,1932. [Photographer: Donald Cooksey]

27-inch cyclotron tank #1 and magnet,1932. [Photographer: Donald Cooksey]

37-inch magnet water tanks in the Old Radiation Laboratory, print taken in 1937. Principal Investigator/Project: Analog Conversion Project

Early Radiation Laboratory staff framed by the magnet for the 60-inch cyclotron in 1938. Front row, left to right: John H. Lawrence, Robert Serber, Franz N.D. Kurie, Raymond T. Birge, Ernest O. Lawrence, Donald Cooksey, Arthur H. Snell, Luis W. Alvarezz, Philip H. Abelson. Second row: John Backus, Wilfred B. Mann, Paul C. Aebersold, Edwin M. McMillan, Ernest Lyman, Martin D. Kamen, D.C. Kalbfell, W.W. Salisbury. Back row: Alex S. Langsdorf, Jr., Sam Simmons, Joseph G. Hamilton, David H. Sloan, J. Robert Oppenheimer, William Brobeck, Robert Cornog, Robert R. Wilson, Eugene Viez, J.J. Livingood. [Photographer: Donald Cooksey]

Mrs. Jackson Laslett (right) sitting on top of of 60" cyclotron magnet yoke in,1938. Cooksey 8-9 [Photographer: Donald Cooksey]

Unidentified workmen at 60-inch cyclotron magnet yoke. Cooksey 8-3, March 1, 1938. [Photographer: Donald Cooksey]

Unidentified workmen at 60-inch cyclotron magnet yoke. Cooksey 8-42, March 1, 1938. [Photographer: Donald Cooksey]

Unidentified individuals at 60-inch cyclotron magnet yoke. Cooksey 8-2, March 1, 1938. [Photographer: Donald Cooksey]

Ernest O. Lawrence and workers sitting inside and on top of of 60" cyclotron magnet yoke in August 1938. Originally from film #8, page 2, frame #7. See also B&W negative Cooksey-789. [Photographer: Donald Cooksey]

Ernest O. Lawrence and workers sitting inside and on top of of 60" cyclotron magnet yoke in August 1938. Originally from film #8, page 2, frame #6. See also B&W negative Cooksey-789. [Photographer: Donald Cooksey]

60-inch cyclotron magnet at right with associated equipment. Cooksey 13-40, Feburary 6, 1939. [Photographer: Donald Cooksey]

60-inch cyclotron magnet. Cooksey 14-28, Feburary 15, 1939. [Photographer: Donald Cooksey]

Insertion of Dees (D's) into 60-inch magnet. Cooksey 31-9, April 1, 1939. [Photographer: Donald Cooksey]

60-inch cyclotron with Milton White and his reflection. August 23, 1939. Cooksey 44. Cooksey note: Looking from above at the "east" side, one sees, below the union of the two dee support tanks, the high speed (approximately 5000 L/sec) oil diffusion pump developed in this laboratory. Professor Milton G. White is by the magnet. Some of the equipment with which Alvarez and Cornog discovered helium three is behind White. Paint cans full of water are piled in front of the control room to reduce the radiation at that point. [Photographer: Donald Cooksey]

1933 - Standing before 74 tons of iron and copper are Professor M. Stanley Livingston (left) now of the Massachusetts Institute of Technology and Professor Ernest Orlando Lawrence. Magnet development has continued to expanded more nearly to its capacity, producing the new nuclear particles known as neutrons in quantities sufficient for actual human therapy. Negative envelope dated February 1, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

75-ton 37-inch deuteron beam out. The Federal Telegraph magnet shown with new 37-inch pole tips. A beam of deuterons of about 6.3 meV. is seen coming from the target chamber, taken February 1, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Yale professor Charlton Dows Cooksey (brother of Donald Cooksey) with model 184-inch magnet test setup. Note the common shaft driving coils in both models, taken May 22, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. First copper delivery, taken October 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site excavation with Robert Cornog, taken October 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site copper delivery, taken October 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site excavation, taken October 5, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site excavation, taken October 5, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet 5 ft. thick subfoundation being poured (east end of excavation pit), taken October 8, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. Naomi Weiss with 100,000 pounds of copper, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation forms, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation forms, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation reinforcing steel bed, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation with half of the concrete poured, taken October 11, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Edwin McMillan on 184-inch magnet foundation forms. Taken October 16, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation forms. Pouring concrete into the east wall, taken October 17, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Bill Brobeck with184-inch magnet copper sample from Phelps Dodge Copper Products Corporation, taken October 17, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation. Pouring concrete into the base, taken October 18, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Brode's magnet, taken October 21, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet rail, with Edwin McMillan, taken October 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Edwin McMillan with184-inch magnet "power line," taken October 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Ernest Orlando Lawrence standing on 184-inch magnet foundation west rail, taken October 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Workman in discussion with Bob Wicker and Wallace B. Reynolds at 184-inch magnet site, taken October 31, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. Left to right: Bill Farley, Paul Aebersold, Bill Brobeck, John Backus, Robert Cornog, taken November 12, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. Wallace B. Reynolds, Henry Bigge (Bigge Drayage Co., Oakland), and Bill Brobeck, taken November 14, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet foundation, Wilson bracing "H" beam support, taken November 19, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Cutting machine at the184-inch magnet site, taken November 25, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. First plate being lowered into place, taken November 25, 1940. Photo includes onlookers. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. Moving first plate into position, taken November 25, 1940. Photo includes onlookers. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. First plate being lowered into place, taken November 25, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. First plate resting on the rails while the rear of the truck is being supported, taken November 25, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch magnet site. Bill Brobeck on first installed plates, taken November 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch cyclotron magnet site. Paul Aebersold and Donald Cooksey standing on rail, taken November 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

View of base of magnet (north side) of 184-inch cyclotron, taken May 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Grounds and Buildings Committee of the Regents of the University of California in front of the184-inch cyclotron magnet pole inspecting progress after having accepted the Medical Physics (Donner Lab) site. Left to right: Ernest Orlando Lawrence, Mortimer Fleishhacker, Robert G. Sproul, (Reverend Monsiginor ) Charles Adolph Ramm, Sidney M. Ehrman, and Edward Augustus Dickson, taken May 21, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch cyclotron exterior building framework, with magnet, taken October 8, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch cyclotron magnet. View from crane girder, taken December 3, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Paul Aebersold standing in magnet gap at 184-inch cyclotron construction site, taken December 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Encasing magnet windings for the184-inch cyclotron, taken May 1942. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

184-inch cyclotron magnet for calutron research during wartime (crane view). Photo taken 2/02/1943. Declassified 4/30/1959. Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, calutron research during wartime (crane view of magnet). Photo taken 3/17/1943. Confidential, declassified 4/30/1959. Principal Investigator/Project: Analog Conversion Project

North side of 184-inch cyclotron, platform and XC magnet (crane view). Photo taken 4/11/1944. Confidential, declassified 4/30/1959. Principal Investigator/Project: Analog Conversion Project

North side of 184-inch cyclotron, platform and XC magnet (crane view). Photo taken 4/11/1944. Confidential, declassified 4/30/1959. Principal Investigator/Project: Analog Conversion Project

37-inch cyclotron magnet and tank. Photo taken 4/18/1944. 37"-108. Principal Investigator/Project: Analog Conversion Project

Crocker Laboratory 60-inch cyclotron, magnet coils. Magnet and pole face, start of knockdown for remodeling. Photo taken 7/18/1944. Declassified 1954. 60"-17 Principal Investigator/Project: Crocker Lab/60-inch

Re-coiling 60-inch coil for magnet, 60-inch cyclotron. Photo taken 7/22/1944. 60"-21 Principal Investigator/Project: Crocker Lab/60-inch

Winding the lower 60-inch magnet (new copper stock), 60-inch cyclotron. Photo taken 7/31/1944. 60"-31 Principal Investigator/Project: Crocker Lab/60-inch

West side of tanks and magnet coils, 60-inch cyclotron. Photo taken 7/03/1945. Declassified 1954. 60"-123 Principal Investigator/Project: Crocker Lab/60-inch

North-East side of tanks and magnet coils, 60-inch cyclotron. Photo taken 7/03/1945. Declassified 4/30/1959. 60"-126 Principal Investigator/Project: Crocker Lab/60-inch

West side of tanks and magnet coils, 60-inch cyclotron. Photo taken 7/03/1945. Declassified 1954. 60"-122 Principal Investigator/Project: Crocker Lab/60-inch

Shim for 184-inch cyclotron magnet model. Photo taken 12/07/1945. 184"-119. Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron magnet poles for 1 1/2" gap. Photo taken 12/19/1945. 184"-133. Principal Investigator/Project: Analog Conversion Project

Ernest O. Lawrence, Glenn T. Seaborg, and J. Robert Oppenheimer in early 1946 at the controls to the magnet of the 184-inch cyclotron, which was being converted from its wartime use to its original purpose as a cyclotron. Morgue 1946-12 (P-1) [Photographer: Donald Cooksey]

Torturing pole plates for 184-inch cyclotron magnet. Photo taken 2/12/1946. 184"-155 Principal Investigator/Project: Analog Conversion Project

Beveled edges on pole plates for 184-inch cyclotron magnet. Photo taken 2/12/1946. 184"-154 Principal Investigator/Project: Analog Conversion Project

Water cooled magneto, 184-inch cyclotron magnet. Photo taken 2/14/1946. 184"-156. Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, calutron conversion, magnet plate adjustment system. Photo taken 2/22/1946. 184"-314 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, calutron conversion, sliding plates onto magnet. Photo taken 2/22/1946. 184"-317 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron converted from a calutron to a synchrocyclotron in 1945-46. Ernest O. Lawrence and staff posed with the magnet. Photo taken 4/28/1946. Restricted (declassified 4/30/1959). Principal Investigator/Project: Image Library Project

184-inch cyclotron tubes and magnet. Photo taken 5/12/1946, suggested by Brobeck. Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron tubes and magnet. Photo taken 5/14/1946, suggested by Brobeck. Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, calutron conversion. Coarse control for 184-inch magnet. Photo taken 7/03/1946. 184"-270 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, calutron conversion. Coarse control for 184-inch magnet. Photo taken 7/03/1946. 184"-279 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, calutron conversion, view through magnet at face plate and rotor condenser. Photo taken 8/20/1946. 184"-300 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron magnet with protective canvas. Photo taken 1/30/1947. 184"-649 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Overhead view of the cyclotron, showing magnet yoke, crane, and shielding. Photo taken 4/04/1947. 184"-711 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Deflected beam pattern with focusing magnet (100 amps) and deuteron tube. Photo taken 12/01/1947. 184"-854 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Deflected beam pattern with various currents on focusing magnet. Photo taken 12/01/1947. 184"-853 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Deflected beam pattern on port of focusing magnet. Photo taken 12/01/1947. 184"-852 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron beam focusing magnet. Photo taken 12/03/1947. 184"-861 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron beam focusing magnet. Photo taken 12/03/1947. 184"-860 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron, bending the magnet. Photo taken 12/03/1947. 184"-855 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron beam focusing magnet. Photo taken 12/03/1947. 184"-859 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Beam focusing magnet. Photo taken 1/01/1948. 184"-896 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Beam emerging from focusing magnet and 140 inch of deuteron beam tube. Superseded by 184" 934. Photo taken 1/05/1948. 184"-899 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Beam emerging from focusing magnet and 14U of deuteron beam tube. Photo taken 5/12/1948. 184"-934 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron beam focusing magnet. Photo taken 3/31/1949. 184"-1012 Principal Investigator/Project: Analog Conversion Project

Partly assembled pole piece. The magnet poles of the very first sector-focused cyclotron, of which the 88" is a later and grander example. Original photo taken 5/19/52. Principal Investigator/Project: Analog Conversion Project

Magnet differential ampere meter. Photo taken 3/02/1953. 60"-526. Principal Investigator/Project: Crocker Lab/60-inch

Magnet regulator. Photo taken 3/02/1953. 60"-528. Principal Investigator/Project: Crocker Lab/60-inch

Magnet regulator. Photo taken 3/02/1953. 60"-529. Principal Investigator/Project: Crocker Lab/60-inch

184-inch cyclotron model magnet. Photo taken 8/31/1953. 184"-1142 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Moving auxiliary magnet coil into Bldg. 6. Photo taken 3/19/1954. 184"-1232 Principal Investigator/Project: Analog Conversion Project

184-inch cyclotron. Moving auxiliary magnet coil into Bldg. 6. Photo taken 3/19/1954. 184"-1230 Principal Investigator/Project: Analog Conversion Project