205 research outputs found
Search for the Fundamental Structure of the Universe
No full text(This information was taken from the Distinguished Scientist Lecture Series Program 1982-1983).
Dr. Ting, Nobel laureate and Thomas Dudley Cabot Institute Professor at Massachusetts Institute of Technology, was born in Ann Arbor, Michigan. He attended the University of Michigan where he received a B . S. E. degree in 1959, an M .S. degree in 1960, and a Ph.D. degree in 1962.
In 1976, Dr. Ting was named co-recipient of the Nobel Prize in Physics with Dr. Burton Richter. Before joining MIT in 1967, Dr. Ting was a Ford Fellow at the European Organization for Nuclear Research (CERN) in Geneva, Switzerland in 1963. He taught at Columbia University from 1964 to 1967, and served as group leader at Deutsche Electronen Synchrotron (DESY) in Hamburg, Germany in 1966. In 1970, Dr. Ting served in the Division of Particle and Fields of the American Physical Society, and was Associate Editor of Nuclear Physics B.
He was elected a Fellow of the American Academy of Art and Sciences in 1975, and became an Academia Sinica Fellow in 1976. Dr. Ting was honored with the Ernest Orlando Lawrence Award in 1976, and with the Eringen Medal of the Society of Engineering Science in 1977. He is a member of the National Academy of Sciences.
His Work: Dr. Ting and Dr. Richter, working in separate groups , electrified the world of high energy physics in November of 1974 with the discovery of a new particle with remarkable properties. Dr. Ting, in collaboration with teams from MIT and Brookhaven National Laboratory, was studying production of an electron in conjunction with its antiparticle -the positron-in protron-nucleon collisions at Brookhaven. His group found a remarkable yield of electron-positron pairs of rest energy 3. 1 Gev ( gigaelectron or one billion electron volts), indicating the production of a new particle, which they named J. Dr. Richter\u27s collaboration, Stanford Linear Accelerator Center-Lawrence Berkeley Laboratory, meanwhile, was studying at the same time the reverse process, discovering the same new particle which they named 4J . The implications of the e experiment continue to stimulate reformulation of our basic undersranding of matter.
His Lecture: October 16, 1982: Search for the Fundamental Structure of the Universe.https://digitalcommons.bard.edu/dsls_1982_1983/1006/thumbnail.jp
Local university to participate in international research
No full text"National Cheng Kung University in Tainan, southern Taiwan, will participate in an international antimatter research project headed by Nobel laureate in physics Dr. Samuel C.C. Ting" (1/2 page)
Experimental tests of electroweak theories at MARK-J
No full textThesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1984.MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.Includes bibliographical references.by He Sheng Chen.Ph.D
Measurement of the Fluorine, Sodium, and Aluminum Fluxes in Cosmic Rays with the AMS Experiment on the International Space Station
No full textPrimary nuclei (He, C, O, Ne, Mg, Si, ...) are thought to be mainly produced and accelerated in astrophysical sources such as the supernova. Secondary nuclei (Li, Be, B, ...) are mostly produced by interactions of primary nuclei with the interstellar medium. Precise knowledge of the secondary-to-primary flux ratio, like B/C, is essential in the understanding of cosmic ray propagation. This thesis presents the first precision measurements of the heavy cosmic ray fluorine (F), sodium (Na), and aluminum (Al) fluxes in the rigidity range from 2.15 GV to 3.0 TV, based on data collected by the Alpha Magnetic Spectrometer (AMS) during the first 8.5 years of operation. The F flux is believed to be the only pure secondary flux between oxygen and silicon, and Na and Al fluxes are thought to be produced both in astrophysical sources and by the collisions of heavier nuclei with the interstellar medium.
The measurements show that the F flux deviates from a single power law above 200 GV. The heavier secondary-to-primary F/Si flux ratio rigidity dependence is distinctly different from the lighter B/O (or B/C) rigidity dependence. In particular, above 10 GV, the [(F/Si)/(B/O)] ratio can be described by a power law ^δ with δ = 0.052 ± 0.007. This shows that the propagation properties of heavy cosmic rays, from F to Si, are different from those of light cosmic rays, from He to O, and that the secondary cosmic rays have two classes. The Na and Al fluxes are well described by the sums of a primary cosmic ray component (proportional to the Si flux) and a secondary cosmic ray component (proportional to the F flux), similar to the nitrogen (N) flux. The fraction of the primary component increases with rigidity for the N, Na, and Al fluxes and becomes dominant at the highest rigidities. The Na/Si and Al/Si abundance ratios at the source, 0.036 ± 0.003 for Na/Si and 0.103 ± 0.004 for Al/Si, are determined independent of cosmic ray propagation.Ph.D
Hadron production from e⁺e⁻ collisions around the Z⁰ mass
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1990.Includes bibliographical references (p. 35-37).by Yuan-Hann Chang.Ph.D
A precision measurement of the cosmic ray positron fraction on the International Space Station
No full textThesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2016.Cataloged from PDF version of thesis.Includes bibliographical references (pages 118-128).AMS-02 is a precision particle physics experiment in space aiming to study dark matter, antimatter, and properties of cosmic rays to the TeV energy scale. This thesis presents a study of the cosmic ray positron fraction in AMS-02 data covering an energy range of 0.5 GeV to 500 GeV, and identifies 10.3 x 106 electron and 650 x 101 positron events. The results show that the positron fraction increases with energy and reaches a maximum at 275 ± 32 GeV.by Matthew Scott Krafczyk.Ph. D
Measurement of neutral meson production in hadronic Z decays
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.Includes bibliographical references (p. 73-78).by Jianchun Wang.Ph.D
Summary of experimental results and future opportunities
No full textThis article is based on the summary talk presented at the XVII International Symposium on Lepton-Photon Interactions in Beijing, China, on 15 August 1995. It includes a selection of highlights of experimental results and future plans of different laboratories, as seen by each Laboratory Management. It also presents some particle physics experiments underground and in space
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