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General Information
Description of Collection Historical Note Scope and Contents of Collection Restrictions on Use and Access Selected Search Terms Administrative InformationContainer List
Series I: Scientific logbooks of Chamberlain, Segrè and Wiegand, 1946-1954Lawrence Berkeley Laboratory Physics Division scientific logbooks of Owen Chamberlain, Emilio Segrè and Clyde Wiegand, 1946-1954
Description of Collection
Repository
National Archives and Records Administration. Pacific Sierra Region.
1000 Commodore Drive
San Bruno, CA 94066
USA
http://www.archives.gov/pacific/san-francisco/
sanbruno.archives@nara.gov
Papers created by
Lawrence Berkeley Laboratory. Physics Division
Size of collection
1.25 linear feet
1 records box(s)
Short description of collection
These logbooks document the group experiments of Owen Chamberlain, Emilio Segrè and Clyde Wiegand.
Language(s) of collection
English
Collection number:
ARO-2486 (NRHS 326-02-007)
Historical Note
The laboratory was founded as the University of California Radiation Laboratory in 1931 by Ernest Orlando Lawrence, a University of California Berkeley physicist who won the 1939 Nobel Prize in physics for his invention of the cyclotron, a circular particle accelerator that opened the door to high-energy physics. It is a United States Department of Energy National Laboratory, operated by the University of California. The name of the laboratory has evolved since its founding: Lawrence Radiation Laboratory (1931-1958), the Lawrence Berkeley Laboratory (1959-1995), and currently the Lawrence Berkeley National Laboratory (1995-present).
Scope and Contents of Collection
These logbooks document the group experiments of Owen Chamberlain, Emilio Segrè, and Clyde Wiegand. Their experiments related to polarized high-energy protons and lead to the discovery of the antiproton, including n-p, d-p, p-d scattering experiments, using the Bevatron accelerator at the Lawrence Berkeley Laboratory (LBL). In 1959, Owen Chamberlain and Emilio Segre won the Nobel Prize for the discovery of the antiproton. Segrè's group had constructed an elaborate detecting system in which two scintillation counters fed a circuit that timed the passage of a charged particle between them, about 50 billionths of a second for an antiproton with v-3 c/4. Any one of the 50,000 negative pions that accompanied each antiproton traversed the same distance in even less time and could easily be distinguished from the heavier particle, using the advanced coincidence circuitry designed by Clyde Wiegand. A second Cerenkov counter, designed by Wiegand and Owen Chamberlain, had a mirror system that confined its counts to particles moving at between 0.75c and 0.78c.
Restrictions on Use and Access
This collection requires permission for access. Please contact the repository for more information, via email at aro@lbl.gov.
Selected Search Terms
These papers have been indexed in the International Catalog of Sources for History of Physics and Allied Sciences (ICOS) using the following terms. Those seeking related materials should search under these terms.
Persons
Chamberlain, O. (Owen)
Segrè, Emilio.
Wiegand, Clyde (Clyde Edward), 1915-1996
Institutions
Lawrence Berkeley Laboratory.
Lawrence Berkeley Laboratory. Physics Division
Lawrence Berkeley National Laboratory.
Lawrence Radiation Laboratory.
Subject terms
Antiprotons.
Bevatron.
Protons.
Genre terms
Administrative Information
Title
Finding Aid to the Lawrence Berkeley Laboratory Physics Division scientific logbooks of Owen Chamberlain, Emilio Segrè and Clyde Wiegand, 1946-1954
Publisher
American Institute of Physics Niels Bohr Library & Archives
One Physics Ellipse
College Park, MD 20740
USA
nbl@aip.org
2012
Encoding Information
Machine-readable finding aid encoded by Melanie J. Mueller in 2012. Any revisions made to this finding aid occurred as part of the editing and encoding process.
Series I: Scientific logbooks of Chamberlain, Segrè and Wiegand, 1946-1954
| Box 1 | Folder 1 | High Energy Neutron Fission, July 1946-March 1948 |
| Folder 2 | BE7 Experiment Book 2, May 8, 1947-February 3,1950 |
| Folder 3 | N-P Scattering, Book I, November 1947-February 1948 |
| Folder 4 | N-P Scattering, Book II, February-June 1948 |
| Folder 5 | D-P Scattering Booi I P-P Scattering, March 1948-May 1949 |
| Folder 6 | William Goldsworth-Electronic Circuits, April 1, 1947-July 8, 1949 |
| Folder 7 | Stern-Ionization Chamber, March 28, 1949-May 8, 1950 |
| Folder 8 | N-P Scattering, Book IV, March 1949-January 1950 |
| Folder 9 | P-Absorption, July-December 1950 |
| Folder 10 | D-P Scattering I Bloom and Stern, March-December 1950 |
| Folder 11 | D-P Scattering II Bloom and Stern, January-July 1951 |
| Folder 12 | P-D Book I (Clark), September 1951-February 1953 |
| Folder 13 | David D. Clark-Supplementary Notes to P-D Elastic Scattering Experiment, December 1952-August 1953 |
| Folder 14 | D-P III Bloom and Stern, July 1951-August 1953 |
| Folder 15 | Richard Morris, July 14, 1953-December 11, 1953 |
| Folder 16 | P-D Book II (Clark), March-September 1953 |
| [Untitled Log Book], June-October 1954 |
| Folder 17 | P-P IX Chamberlain, Powell, Segrè, Wiegand, June 1954 |
| Folder 18 | P-P V, March 1953-May 1954 |
| Folder 20 | G.H.P. I - Liguiard Scintillator Light-Pipe and 5819 Test Setup, March 1953-September 1954 |