- Astronomy (x)
- 1709 (x)
- Anderson, Carl D. (x)
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Title
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Cloud chamber photo of tracks of a positron
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Format
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photograph: negative
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Date
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1932-08-02
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Series
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Individuals, Anderson, Carl D.
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Description
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On August 2, 1932, while photographing cosmic-ray tracks in a cloud chamber, Carl Anderson captured on film the track left behind of the first clearly identified positive electron. This photograph shows the particle moving upward, as determined by the increase in curvature of the top half of the track after it passed through the lead plate, and curving to the left, meaning its charge is positive. Anderson won the Nobel Prize in physics in 1936 for this discovery., Carl Anderson Papers 5.10.
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Title
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Positron and electron tracks
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Format
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photograph: negative
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Date
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1933
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Series
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Individuals, Anderson, Carl D.
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Description
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One of s series of cloud chamber photographs taken in a very strong magnetic field by Carl Anderson, Robert Millikan, Seth Neddermeyer and William Pickering. This image shows an electron traversing a lead plate in the middle and transferring its energy to a positron.
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Title
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Carl Anderson’s Trip to Europe
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Format
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photograph: print
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Date
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1926
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Series
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Individuals, Anderson, Carl D.
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Description
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Anderson on the way down, from the summit, of Monte Rosa, Switzerland, 1926 to Europe. CIT travel prize Carl D. Anderson and guide.
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Title
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Anderson and Millikan at Pike’s Peak
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Format
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photograph: negative
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Date
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1937
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Series
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Individuals, Anderson, Carl D.
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Description
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Carl Anderson and Robert Millikan at Pike’s Peak, 1937.
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Title
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1911 Pierce Arrow
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Format
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photograph: negative
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Series
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Individuals, Anderson, Carl D.
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Description
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This 1911 Pierce Arrow spent several years parked in an alley next to the aeronautics building. It housed a motor generator--donated by alumnus Frank Capra--that provided power for the cloud chamber magnet used in experiments that won a Nobel Prize for Carl Anderson.
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Title
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Carl Anderson with cloud chamber
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Format
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photograph: negative
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Date
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1932
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Series
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Individuals, Anderson, Carl D.
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Description
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Carl Anderson with cloud chamber with which he discovered the positron in 1932.
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Title
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Carl Anderson at blackboard
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Format
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photograph: print
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Series
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Individuals, Anderson, Carl D.
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Description
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Print is currently missing.
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Title
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Carl Anderson and Seth Neddermeyer with magnet cloud chamber
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Format
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photograph: print
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Series
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Individuals, Anderson, Carl D.
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Description
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This piece of equipment was used by Anderson to discover the positron--the first empirical evidence for the existence of antimatter--in 1932. Four years later they announced the discvery of mesons (muons). Housed in the Guggenheim Aeronautical Lab, the apparatus was in service for seventeen years. Photo from E&S, Caltech Office of Public Relations.
