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or final enrichment to between 92 and 98 percent after the problems with the gaseous diffusion process were resolved in 1950 it was decided not to proceed with a full scale electromagnetic plant 96 97 as of 2009 update it remains operational 91 in 1969 a research calutron known as s 2 was built at arzamas 16 for high efficiency separation of isotopes of heavy elements like plutonium 96 98 99 four research and production calutrons were built at the china institute of atomic energy in beijing of identical design to those of the ussr in the early 1960s 100 101 102 united kingdom edit in 1945 the british atomic bomb project built a 180 calutron similar in design to an american beta calutron at the atomic energy research establishment at harwell oxfordshire owing to the success of the gaseous diffusion plant at capenhurst electromagnetic separation was not pursued by the united kingdom and the calutron was used to separate isotopes for research the 180 design was not ideal for this purpose so harwell built a 90 calutron hermes the heavy elements and radioactive material electromagnetic separator 103 it was inspired by france s sidonie and paris separators at the laboratoire rené bernas of the university of paris ix in orsay and parsifal at the military research laboratory of the commissariat à l énergie atomique et aux énergies alternatives in bruyères le châtel 104 105 israel japan and france edit israel japan and france also built some research calutrons including the solis and meira separators at the soreq nuclear research center there is also cern s isotope separator on line detector isolde which was built in 1967 106 india edit a calutron at the saha institute of nuclear physics at bidhan nagar in india was used to produce plutonium for india s first nuclear test on 18 may 1974 96 107 iraq edit after the 1990 91 gulf war unscom determined that iraq had been pursuing a calutron program to enrich uranium 108 iraq chose to develop the electromagnetic process over more modern economic and efficient methods of enrichment because calutrons were easier to build with fewer technical challenges and the components required to build them were not subject to export controls 109 110 at the time the program was discovered iraq was estimated to be two or three years away from producing enough material for nuclear weapons the program was destroyed in the gulf war 111 consequently the nuclear suppliers group added the electromagnetic separation equipment to its guidelines for transfers of nuclear related dual use equipment material and technology 112 113 notes edit hewlett anderson 1962 pp 10 12 stuewer 1985 pp 211 214 smyth 1945 p 172 nier alfred o booth e t dunning j r von grosse a march 1940 nuclear fission of separated uranium isotopes physical review 57 6 546 bibcode 1940phrv 57 546n doi 10 1103 physrev 57 546 s2cid 4106096 hewlett anderson 1962 pp 10 14 jones 1985 p 12 rhodes 1986 pp 322 325 1 2 hewlett anderson 1962 p 42 hewlett anderson 1962 pp 39 40 phelps 2010 pp 126 128 phelps 2010 pp 281 283 1 2 3 4 hewlett anderson 1962 pp 43 44 cockburn ellyard 1981 pp 74 78 de laeter john r böhlke john karl bièvre p de hidaka h peiser h s rosman k j r taylor p d p 1 january 2003 atomic weights of the elements review 2000 iupac technical report pure and applied chemistry 75 6 683 800 doi 10 1351 pac200375060683 s2cid 96800435 smyth 1945 pp 156 157 oliphant m l e shire e s crowther b m 15 october 1934 separation of the isotopes of lithium and some nuclear transformations observed with them proceedings of the royal society a 146 859 922 929 bibcode 1934rspsa 146 922o doi 10 1098 rspa 1934 0197 smyth 1945 pp 164 165 1 2 smyth 1945 pp 188 189 jones 1985 p 119 hiltzik 2015 p 238 albright hibbs 1991 p 18 1 2 hewlett anderson 1962 pp 56 58 hewlett anderson 1962 p 59 parkins 2005 pp 45 46 smith lloyd p parkins w e forrester a t december 1947 on the separation of isotopes in quantity by electromagnetic means physical review 72 11 989 1002 bibcode 1947phrv 72 989s doi 10 1103 physrev 72 989 peat 1997 pp 64 65 1 2 smyth 1945 p 190 a theodore forrester ucla professor acclaimed inventor los angeles times 31 march 1987 retrieved 1 september 2015 gowing 1964 pp 256 260 jones 1985 p 124 smyth 1945 p 192 manhattan district 1947b p 1 8 1 2 parkins 2005 p 48 1 2 hewlett anderson 1962 pp 92 93 1 2 us 2719924 j robert oppenheimer frankel stanley phillips carlyle nelson eldred magnetic shims published 4 october 1955 assigned to united states atomic energy commission us 2709222 lawrence ernest o methods of and apparatus for separating materials published 24 may 1955 assigned to united states atomic energy commission us 2847576 lawrence ernest o calutron system published 12 august 1958 assigned to united states atomic energy commission massey harrie davis d h november 1981 eric henry stoneley burhop 31 january 1911 22 january 1980 biographical memoirs of fellows of the royal society 27 27 131 152 doi 10 1098 rsbm 1981 0006 jstor 769868 s2cid 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washington dc manhattan district manhattan district 1947e manhattan district history book v electromagnetic project volume 5 construction pdf washington dc manhattan district manhattan district 1947f manhattan district history book v electromagnetic project volume 6 operation pdf washington dc manhattan district nichols kenneth 1987 the road to trinity a personal account of how america s nuclear policies were made new york morrow isbn 0 688 06910 x parkins william e 1 may 2005 the uranium bomb the calutron and the space charge problem pdf physics today 58 5 45 51 bibcode 2005pht 58e 45p doi 10 1063 1 1995747 archived from the original pdf on 26 may 2020 retrieved 26 august 2015 peat f david 1997 infinite potential the life and times of david bohm reading massachusetts addison wesley isbn 978 0 201 40635 1 oclc 34894427 phelps stephen 2010 the tizard mission the top secret operation that changed the course of world war ii yardley pennsylvania westholme isbn 978 1 59416 116 2 oclc 642846903 rhodes richard 1986 the making of the atomic bomb london simon schuster isbn 0 671 44133 7 smyth henry dewolf 1945 atomic energy for military purposes the official report on the development of the atomic bomb under the auspices of the united states government 1940 1945 princeton new jersey princeton university press oclc 770285 stuewer roger h 1985 niels bohr and nuclear physics in french a p kennedy p j eds niels bohr a centenary volume cambridge massachusetts harvard university press pp 197 220 isbn 978 0 674 62415 3 yergey alfred l yergey a karl september 1997 preparative scale mass spectrometry a brief history of the calutron journal of the american society for mass spectrometry 8 9 943 953 bibcode 1997jasms 8 943y doi 10 1016 s1044 0305 97 00123 2 issn 1044 0305 s2cid 95235848 further reading edit guthrie andrew wakerling r k eds 1949 volume 1 vacuum equipment and techniques national nuclear energy series manhattan project technical section division i electromagnetic separation project new york mcgraw h...
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