Biographical Memoirs Volume 76 (1999) / Chapter Skim
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Kenneth Tompkins Bainbridge
Kenneth Tompkins Bainbridge
Pages 18-35
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applications of mass spectrographs as research tools for nuclear mass measurements. His precise measurements of mass differences between nuclear isotopes, when comparer!
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War I returning naval vessels clockocI. As a high schooler, Ken became interested in radio, on the famiTy's rooftop he put an antenna that came to the attention of ship raclio operators, who wouIc!
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Ken's initial attraction to mass spectroscopy was exciter! by his desire to search for the then uncletectec!
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Szilard went on to envisage a much more practical process involving neutrons, which, of course, only became reality after neutron-induced uranium fission was discovered. At Cambridge Ken continued to pursue mass spectroscopy and began a continuing close
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It remained there after the war, never to return to Harvard. Bainbridge's interest in mass spectroscopy of nuclei led him to modify the naturally occurring abundances of nuclear isotopes, and he proposed a method using gaseous counterflow in a Holwock molecular vacuum pump.
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In wartime activities that involved close collaboration with parallel projects in Britain, Ken's friendship with British physicists, especially with Cockroft, who hac! been a scientist member of the Tizard Mission, was an asset.
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Robert Oppenheimer immecliately after the event "Now we are all sons of bitches" marked the beginning of his cleclication to encling the testing of nuclear weapons en c! to efforts to maintain civilian control of future clevelopments in that fielcI.
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when it became a facility for research on the use and clinical applications of the highly focused proton beam in collaborative projects with staff members from the Massachusetts General Hospital. It will be shut clown finally in the late 199Os, when its role will be taken over by an even more powerful cleclicatec!
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In aciclition to constructing his large mass spectrograph to make precise measurements of mass differences among pairs, he built an elegant clouble-focusing electron spectrograph. In the years before his retirement in 1975, Ken clevotec!
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to serve on a joint Iran-Harvarc! planning commission to design Reza Shah Kabir University for Iran.
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of nuclear physics cluring his many active years. Especially notable were his several designs of mass spectrographs en c!
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T Bainbridge by John Bryant published as "Rad Lab: Oral Histories Documenting World War II Activities at the MIT Radiation Laboratory" published by the IEEE in 1993 and the Bainbridge articles in the Bulletin of the Atomic Scientists cited in the bibliography (1975~.
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Jabez Curry Street 1906-1989. In Biographical Memoirs, vol.
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44:123. Atomic masses and structure of atomic nuclei.7.
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Rev.90:43039. Charged particle dynamics and optics, relative isotopic abundances of the elements, atomic masses.
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31~4~:42-46. All in our time Afoul and awesome display.
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