2,271 research outputs found
Testing and Final Construction of the Superconducting Magnet for the Alpha Magnetic Spectrometer
No full textThe Alpha Magnetic Spectrometer (AMS) is a particle physics experiment based on the International Space Station (ISS). At the heart of the detector is a large superconducting magnet, cooled to a temperature of 1.8 K by superfluid helium. The magnet and cryogenic system have been designed and built by Scientific Magnetics (formerly Space Cryomagnetics) of Culham, England. This paper describes the results from magnet testing, and the final assembly of the magnet and flight cryostat
Personal journey with Samuel Ting, Nobel Laureate physicist
No full textIn interviews with historians, descendants, and recent immigrants, this program begins with a description of the early 1880s when a wave of anti-Chinese sentiment swept across America, abetted by the Chinese Exclusion Act. Families were kept apart by both ancient custom and U.S. law. These immigrants were trapped between countries, at home neither in the U.S. nor in China. The law of the land, which separated these families, also provided relief as Chinese Americans turned to the courts for justice. Presents Chinese Americans contributions during World War II, and describes their struggles to prove their value both in war time and after returning home
Interview with Barry C. Barish
Get PDFInterview in five sessions, May-July 1998, with Barry C. Barish, Linde Professor of Physics emeritus and director of LIGO [Laser Interferometer Gravitational-Wave Observatory] 1994-2005.
Recalls undergraduate education, Berkeley; graduate work on Lawrence Radiation Laboratory cyclotron; postdoc work on bevatron. Meets Alvin Tollestrup, comes to Caltech as postdoc, 1963. At Brookhaven National Laboratory. At Stanford Linear Accelerator Center with Henry Kendall, Richard Taylor, and Jerome Friedman. With Frank Sciulli, proposes neutrino experiment for Fermilab; work on tau leptons at SLAC. Move to Cornell.
Discusses history of magnetic monopoles and his work on monopoles at Caltech in 1980s. Discusses history of SSC [Superconducting Super Collider]; problems with Standard Model of Particle Physics; Aspen conferences to plan SSC; selection of Texas site. Involvement of Samuel C. C. Ting. Devises SSC experiment, with W. J. Willis. SSC's defeat in Congress (1993). Discusses his work in Italy on monopoles, in Gran Sasso tunnel. MACRO [Monopole Astrophysics Cosmic Ray Observatory] detector.
Discusses history of LIGO. Bar detector experiments of Joseph Weber. Initial meetings at Caltech. Hiring of Ronald W. P. Drever. Rochus E. (Robbie) Vogt as head, 1987. Disastrous technical review and project review, 1992-93. He takes project over from Vogt in February 1994. Discusses problems he encountered and lack of evolution between 1989 and 1994. Discusses LIGO's technical difficulties and evolution of its organizational structure. LIGO Laboratory and LIGO (construction) Project. Establishment of LIGO Scientific Collaboration.
Comments on Caltech; disinclination to serve on committees, enjoyment of teaching. Recollections of Richard Feynman. Influence of Tollestrup and Taylor
Results from the first physics run at LEP: reports from each of the LEP experiments, 2
No full textPhysics at LEP stopped early on Monday 9 october for a scheduled one-week shutdown. The final days of this run were extremely profitable for the four experiments, with the machine colliding substantial electron and positron beams practically non-stop. The superconducting 'low-beta' magnets to compress the beams and increase the collision rate in the experimental areas made their debut for physics, pushing luminosity levels for the first time above 10 to the 30. The machine also made two systematic sweeps of the energy region around 91 GeV, so that the experiments could make a precision fix on the famous Z resonance. With improvements during the shutdown and with increased expertise from machine development studies, collision rates should continue to improve. Between them, the experiments - ALEPH, OPAL, DELPHI, and L3 - have accumulated more than ten thousand examples of Z particles, and first physics results should soon emerge. S. Ting presents the physics results of L3
Study of high-mass photon pairs in events
No full textFrom the analysis of the reactions we observe four events, one and three , with the invariant mass of the photon pairs close to 60 . These events were selected from a datasample collected in the L3 detector corresponding to 950,000 produced Z^{0}'s. The detailed distribution of these events and their possible origin will be presented.Conference on photon reactio
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No full text17 consonnes du françaisLes sujets ont été enregistrés dans la chambre sourde de L'ILPGA avec un magnétophone DAT
Sony DTC 690 réglé sur une fréquence d'échantillonnage de 48 KHz. Le micro (audio / Technica ATM
33A) était placé à environ 25 cm de la bouche du locuteur. Le locuteur était assis en face de
l'expérimentateur dans une situation de communication normale
Results from the first physics run at LEP: reports from each of the LEP experiments, 3
No full textPhysics at LEP stopped early on Monday 9 october for a scheduled one-week shutdown. The final days of this run were extremely profitable for the four experiments, with the machine colliding substantial electron and positron beams practically non-stop. The superconducting 'low-beta' magnets to compress the beams and increase the collision rate in the experimental areas made their debut for physics, pushing luminosity levels for the first time above 10 to the 30. The machine also made two systematic sweeps of the energy region around 91 GeV, so that the experiments could make a precision fix on the famous Z resonance. With improvements during the shutdown and with increased expertise from machine development studies, collision rates should continue to improve. Between them, the experiments - ALEPH, OPAL, DELPHI, and L3 - have accumulated more than ten thousand examples of Z particles, and first physics results should soon emerge. S. Ting presents the results of L3. A. Michelini presents the results of OPAL
H.E. Professor Wang Liheng, Minister of Aviation of the People's Republic of China, President, China Aerospace Science & Technology Corporation
No full textH. E. Professor Wang Liheng, Minister of Aviation, and President, China Aerospace Science & Technology Corporation, People's Republic of China (2nd from left) with (from left to right) Professor Hans Hofer, Professor Roger Cashmore, Research Director for Collider Programmes, Professor Samuel C. C. Ting, CERN and Professor Lei Gang, Secretary to the Minister, September 2001
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