|Lawrence W. Jones
Emeritus Professor of Physics,
University of Michigan
OFFICE ADDRESS: 353West Hall
OFFICE PHONE: 734/764-2272
MAILING ADDRESS: University of Michigan, Department of Physics
2477 Randall Laboratory, 500 East University
Ann Arbor, MI 48109-1120
L.W. Jones is an active participant in the L3 Experiment at the LEP (e+e-) collider together with Michigan faculty colleagues Professors Byron Roe and J. Keith Riles. This experiment is located at the CERN Laboratory for Particle Physics in Geneva, Switzerland. This L3 collaboration, of over 500 physicists from over 30 universities and research institutions world-wide, has been collecting data since 1989 on the characteristics of the Z and W Intermediate Vector Bosons; their production and decay, and on related issues such as B-quark physics. With the LEP energy of about 200 GeV (c.m.), increasing emphasis is being placed on searches for the Higgs Boson and Supersymmetric Particles. This collaboration is headed by Professor S.C.C. Ting of M.I.T., a former graduate student of Jones and Professor Martin Perl at Michigan.
A recent focus of Jones' L3 work in the L3 Cosmic program has been the adaptation of the L3 muon spectrometer for the study of cosmic ray muons. Besides research on traditional cosmic ray questions such as the composition of primary cosmic rays, the search for high-energy point sources, etc., these precise muon data are valuable for the improved calculation of atmospheric muon neutrino fluxes.
Besides participating in the ongoing analysis of the L3 cosmic ray muon data, Jones is also a collaborator on a new CERN cosmic ray proposal, CORAL; the objective of which will be the study of muons with a large-area underground tracking chamber array in coincidence with a surface air shower array in order to better understand the primary cosmic ray composition. Karsten Eggert is the spokesman for this project.
Jones is an active communicator between the cosmic ray physicists and high-energy particle physics experimentalists. In recent years he has been an invited speaker at seminars, colloquia, workshops, conferences and international symposia on 6 continents where he has presented cosmic ray data and interpretations to accelerator physicists and the results of high energy accelerator experiments to cosmic ray physicists.
In December, 1998, Jones was honored by the convening of a special symposium at CERN which was organized and convened by Professor Samuel C.C. Ting in recognition of Jones' retirement from the Michigan teaching faculty. Speakers included T. Azemoon and B.P. Roe from Michigan, K. Johnsen and P. LeCoultre from CERN, T.K. Gaisser from Bartol, and A.M. Sessler from Berkeley.
EARLIER RESEARCH ACTIVITIES:
MiniMax, a small experiment at the Fermilab Tevatron proton-antiproton collider, was completed in 1996. This was a search for evidence of DCC, or "Disoriented Chiral Condensates", a mechanism proposed to explain the Centauro phenomenon reported from cosmic ray experiments. The experimental collaboration of about 20 physicists was headed by Professor J.D. Bjorken of SLAC and Cyrus C. Taylor of Case Western Research University; Michigan physicists in the collaboration, besides Jones, were Professor Michael Longo and Dr. H. Richard Gustafson. Final analysis of the data shows no evidence of DCC, although the experiment successfully explored inclusive particle production in the forward pseudorapidity cone (within 50 milliradians of the beam).
Jones has also been a collaborator in the design of FELIX, a proposed detector and experiment concept which was proposed for a 5th detector at the CERN Large Hadron Collider (LHC). The objective of FELIX is to explore in detail extreme forward and backward angles, out to pseudorapidities of 10, following a concept developed by J.D. Bjorken for the U.S. S.S.C. The co-spokesmen for FELIX are Dr. Karsten Eggert of CERN and Professor Cyrus Taylor of CWRU. The FELIX proposal has not yet been approved. Jones also worked with Professor Longo at Michigan on a much smaller experimental proposal for the Fermilab Tevatron to study inclusive production at very small forward and backward angles, although this too has not been approved by the Laboratory.
Earlier Fermilab experiments in which Jones was involved, over the period 1970-90, included neutron studies (production, elastic and inelastic scattering, cross sections, etc.), muon pair production, prompt neutrino production, and the direct observation of proton production of Charm. During the 1960s and early '70s, Jones' experiments at the CERN Proton Synchrotron, the Brookhaven Cosmotron and AGS, the Argonne ZGS, and the Bevatron of the Lawrence Berkeley Laboratory, were primarily concerned with various strong interactions processes; elastic scattering, particle production, cross sections, etc. Michigan collaborators in these experiments included Professors Perl, Longo, and Roe, and Dr. Gustafson.
During the period 1965-72 Jones directed a cosmic ray experimental program on Mt. Evans (14,200 ft.) and Echo Lake (10,800 ft.) in Colorado searching for free quarks and studying inclusive strong interactions at energies above 100 GeV with a 600 liter liquid hydrogen target, wide-gap spark chambers, and a 100 ton hadron calorimeter. This was during a time before laboratory accelerator energies exceeded 30 GeV.
Jones, together with Martin Perl, developed the "Luminescent Chamber" (for photographing tracks in scintillator) in the years 1957-60. Together with other colleagues and students, he also developed the hadron calorimeter, the wide-gap spark chamber, and other detector technologies. During the period 1953-62, Jones was a member of the Midwestern Universities Research Association (MURA) group in accelerator design, where the Fixed-Field Alternating Gradient (FFAG) accelerator and the colliding beams concepts were first proposed and developed. With Kent M. Terwilliger he built and operated, in 1954-57, a 500 keV FFAG electron betatron/synchrotron for the study of accelerator physics. During the 1980s Jones lead the State of Michigan program to develop a site proposal for the Superconducting Super Collider. In 1987 he was a member of the SSC Central Design Group.
Jones has also worked in the development of instrumentation for Nuclear Medicine. In 1970 he developed concepts related to the use of liquid hydrogen as a chemical fuel for vehicles and joined an international community with similar interests. In the late 1990s he worked with members of the Center for Ultra-fast Optical Science at Michigan in the development of table-top electron accelerators powered by high-power pulsed lasers.
Chair, University of Michigan Department of Physics 1982-1987
Recent courses taught:
- Concepts in 20th Century Physics, College Honors 252
- The Physics of Music, Physics 288/489
- Energy, Entropy and the Environment, Physics 250
Other courses taught include intermediate courses on Elementary Particle Physics; Introduction to Quantum Mechanics; Beams, Accelerators, and Detectors for Nuclear and Particle Physics; Heat and Thermodynamics; Optics; and Mechanics, as well as the full sequence of Elementary Physics courses.
Ph.D., Physics, University of California, Berkeley 1952 M.S., Physics, Northwestern University 1949 B.S., Physics, Northwestern University 1948
Professor Emeritus 1998-present Member of the faculty of the University of Michigan Department of Physics 1952-1998
Distinguished Visiting Scholar, University of Adelaide, Australia 1991 Visiting Professor, University of Sydney, Australia 1991 Visiting Scientist, University of Auckland, New Zealand 1991 Member, SSC Central Design Group 1987 Visiting Professor, Tata Institute, Bombay, India 1979 Visiting Professor, Westfield College, University of London 1977 Guggenheim Foundation Fellow (CERN) 1965 Ford Foundation Fellow (CERN) 1961-1962 Physicist, Midwestern University Research Association 1956-1957
Bartol Research Foundation Visiting Committee 1999-present Advisory Panel for Cosmic Rays, Journal of Physics-G, Institute of Physics 1991-95 Consultant, Superconducting SuperCollider Central Design Group 1985-1986 Bartol Research Foundation Visiting Committee 1984-88 Associate, European Laboratory for Particle Physics Research (CERN) 1983-present Gravitation, Cosmology and Cosmic Ray Physics Panel, Physics Survey, NAS and NRC 1983-1986 Elementary Particle Physics Panel, Physics Survey, NAS and NRC 1983-1986 Trustee, Universities Research Association 1981-1987 NASA Consultant 1980-81 Member and Chair, User's Executive Committee, Fermi National Accelerator Laboratory 1979-1982 Advisory Board, International Association for Hydrogen Energy 1976-present Advisor to Environmental Protection Agency, Ann Arbor, MI 1974 Board Member and President, Ann Arbor Ecology Center 1974-75 High Energy Astrophysics Management Operations Working Group, NASA 1974-1978 NASA Consultant 1971-73 Particle and Gamma Ray Panel, NASA HEAO Evaluations Committee 1970 Visiting Scientist, Fermi National Accelerator Laboratory 1969-present HEPAP Subpanel of Cosmic Ray Physics 1968-69 Scheduling Committee for the Bevatron, Lawrence Berkeley Laboratory 1966-68 Visiting Scientist, Lawrence Berkeley Laboratory 1959-1987 Visiting Scientist, Brookhaven National Laboratory 1957-1988
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Last updated January 2001