2002 Annual Report
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CERN Courier–Digital Edition
CERNMarch/April 2021 cerncourier.com COURIERReporting on international high-energy physics WELCOME CERN Courier – digital edition Welcome to the digital edition of the March/April 2021 issue of CERN Courier. Hadron colliders have contributed to a golden era of discovery in high-energy physics, hosting experiments that have enabled physicists to unearth the cornerstones of the Standard Model. This success story began 50 years ago with CERN’s Intersecting Storage Rings (featured on the cover of this issue) and culminated in the Large Hadron Collider (p38) – which has spawned thousands of papers in its first 10 years of operations alone (p47). It also bodes well for a potential future circular collider at CERN operating at a centre-of-mass energy of at least 100 TeV, a feasibility study for which is now in full swing. Even hadron colliders have their limits, however. To explore possible new physics at the highest energy scales, physicists are mounting a series of experiments to search for very weakly interacting “slim” particles that arise from extensions in the Standard Model (p25). Also celebrating a golden anniversary this year is the Institute for Nuclear Research in Moscow (p33), while, elsewhere in this issue: quantum sensors HADRON COLLIDERS target gravitational waves (p10); X-rays go behind the scenes of supernova 50 years of discovery 1987A (p12); a high-performance computing collaboration forms to handle the big-physics data onslaught (p22); Steven Weinberg talks about his latest work (p51); and much more. To sign up to the new-issue alert, please visit: http://comms.iop.org/k/iop/cerncourier To subscribe to the magazine, please visit: https://cerncourier.com/p/about-cern-courier EDITOR: MATTHEW CHALMERS, CERN DIGITAL EDITION CREATED BY IOP PUBLISHING ATLAS spots rare Higgs decay Weinberg on effective field theory Hunting for WISPs CCMarApr21_Cover_v1.indd 1 12/02/2021 09:24 CERNCOURIER www. -
The Secret Hans2.Doc Italicized Paragraphs Not Presented September 19, 2005
091805 The Secret Hans2.doc Italicized paragraphs not presented September 19, 2005 The Secret Hans Richard L. Garwin at Celebrating an Exemplary Life September 19, 2005 Cornell University I recount1 some early interactions I had with Hans, beginning in 1951. Hans had led the Theoretical Division at Los Alamos from 1943 to 1945, and despite his antagonism to the hydrogen bomb, was willing to turn his talents to learning whether it could be done or not, which was his role when we interacted in the summer of 1951. In May of 1951 my wife and I and our infant son went to Los Alamos for the second summer, where I would continue to work mostly on nuclear weapons. I was at that time an Assistant Professor at the University of Chicago and had spent the summer of 1950 at the Los Alamos Laboratory, sharing an office with my colleague and mentor Enrico Fermi—Hans Bethe's mentor in Rome as well. When I returned in 1951, and asked Edward Teller, another University of Chicago colleague, what was new and what I could do, he asked me to devise an experiment to confirm the principle of "radiation implosion," then very secret, that he and Ulam had invented that February. In May 1951, the young physicists Marshall Rosenbluth and Conrad Longmire were trying to do actual calculations on this method for using the energy from an ordinary fission bomb to compress and heat fusion fuel-- that is, heavy hydrogen (deuterium). I decided that the most convincing experiment would be a full-scale hydrogen bomb, so I set about designing that. -
2005 Annual Report American Physical Society
1 2005 Annual Report American Physical Society APS 20052 APS OFFICERS 2006 APS OFFICERS PRESIDENT: PRESIDENT: Marvin L. Cohen John J. Hopfield University of California, Berkeley Princeton University PRESIDENT ELECT: PRESIDENT ELECT: John N. Bahcall Leo P. Kadanoff Institue for Advanced Study, Princeton University of Chicago VICE PRESIDENT: VICE PRESIDENT: John J. Hopfield Arthur Bienenstock Princeton University Stanford University PAST PRESIDENT: PAST PRESIDENT: Helen R. Quinn Marvin L. Cohen Stanford University, (SLAC) University of California, Berkeley EXECUTIVE OFFICER: EXECUTIVE OFFICER: Judy R. Franz Judy R. Franz University of Alabama, Huntsville University of Alabama, Huntsville TREASURER: TREASURER: Thomas McIlrath Thomas McIlrath University of Maryland (Emeritus) University of Maryland (Emeritus) EDITOR-IN-CHIEF: EDITOR-IN-CHIEF: Martin Blume Martin Blume Brookhaven National Laboratory (Emeritus) Brookhaven National Laboratory (Emeritus) PHOTO CREDITS: Cover (l-r): 1Diffraction patterns of a GaN quantum dot particle—UCLA; Spring-8/Riken, Japan; Stanford Synchrotron Radiation Lab, SLAC & UC Davis, Phys. Rev. Lett. 95 085503 (2005) 2TESLA 9-cell 1.3 GHz SRF cavities from ACCEL Corp. in Germany for ILC. (Courtesy Fermilab Visual Media Service 3G0 detector studying strange quarks in the proton—Jefferson Lab 4Sections of a resistive magnet (Florida-Bitter magnet) from NHMFL at Talahassee LETTER FROM THE PRESIDENT APS IN 2005 3 2005 was a very special year for the physics community and the American Physical Society. Declared the World Year of Physics by the United Nations, the year provided a unique opportunity for the international physics community to reach out to the general public while celebrating the centennial of Einstein’s “miraculous year.” The year started with an international Launching Conference in Paris, France that brought together more than 500 students from around the world to interact with leading physicists. -
Particle Detectors Lecture Notes
Lecture Notes Heidelberg, Summer Term 2011 The Physics of Particle Detectors Hans-Christian Schultz-Coulon Kirchhoff-Institut für Physik Introduction Historical Developments Historical Development γ-rays First 1896 Detection of α-, β- and γ-rays 1896 β-rays Image of Becquerel's photographic plate which has been An x-ray picture taken by Wilhelm Röntgen of Albert von fogged by exposure to radiation from a uranium salt. Kölliker's hand at a public lecture on 23 January 1896. Historical Development Rutherford's scattering experiment Microscope + Scintillating ZnS screen Schematic view of Rutherford experiment 1911 Rutherford's original experimental setup Historical Development Detection of cosmic rays [Hess 1912; Nobel prize 1936] ! "# Electrometer Cylinder from Wulf [2 cm diameter] Mirror Strings Microscope Natrium ! !""#$%&'()*+,-)./0)1&$23456/)78096$/'9::9098)1912 $%&!'()*+,-.%!/0&1.)%21331&10!,0%))0!%42%!56784210462!1(,!9624,10462,:177%&!(2;! '()*+,-.%2!<=%4*1;%2%)%:0&67%0%&!;1&>!Victor F. Hess before his 1912 balloon flight in Austria during which he discovered cosmic rays. ?40! @4)*%! ;%&! /0%)),-.&1(8%! A! )1,,%2! ,4-.!;4%!BC;%2!;%,!D)%:0&67%0%&,!(7!;4%! EC2F,1-.,%!;%,!/0&1.)%21331&10,!;&%.%2G!(7!%42%!*H&!;4%!A8)%,(2F!FH2,04F%!I6,40462! %42,0%))%2! J(! :K22%2>! L10&4(7! =4&;! M%&=%2;%0G! (7! ;4%! E(*0! 47! 922%&%2! ;%,! 9624,10462,M6)(7%2!M62!B%(-.04F:%40!*&%4!J(!.1)0%2>! $%&!422%&%G!:)%42%&%!<N)42;%&!;4%20!;%&!O8%&3&H*(2F!;%&!9,6)10462!;%,!P%&C0%,>!'4&;!%&! H8%&! ;4%! BC;%2! F%,%2:0G! ,6! M%&&42F%&0! ,4-.!;1,!1:04M%!9624,10462,M6)(7%2!1(*!;%2! -
Bright Prospects for Tevatron Run II
INTERNATIONAL JOURNAL OF HIGH-ENERGY PHYSICS CERN COURIER VOLUME 43 NUMBER 1 JANUARY/FEBRUARY 2003 Bright prospects for Tevatron Run II JLAB Virginia laboratory delivers terahertz light p6 ^^^J Modular and expandable power supplies WÊ H Communications via TCP/IP içert. n_.___910S.CAEN '^^^*aBOKS^^^^ • ÊÊÊ WÊÊÊSêSê É TÏSjj à OPC Server to ease integration in DCS J Directly interfaced to JCOP Framework p " j^pj ^ ^^^^ Wa9neticFie,dand^ ^^HTJHj^^^^^^^^^^^^^^^^^^^^^^E' ' tfHl far IM Éfefi-*il * CAEN: your largest choice of HV & LV )^ H MULTICHANNEL POWER SUPPLIES CONTENTS Covering current developments in high- energy physics and related fields worldwide CERN Courier (ISSN 0304-288X) is distributed to member state governments, institutes and laboratories affiliated with CERN, and to their personnel. It is published monthly, except for January and August, in English and French editions. The views expressed are CERN not necessarily those of the CERN management. Editors James Gillies and Christine Sutton CERN, 1211 Geneva 23, Switzerland Email [email protected] Fax+41 (22) 782 1906 Web cerncourier.com COURIER Advisory Board R Landua (Chairman), F Close, E Lillest0l, VOLUME 43 NUMBER 1 JANUARY/FEBRUARY 2003 H Hoffmann, C Johnson, K Potter, P Sphicas Laboratory correspondents: Argonne National Laboratory (US): D Ayres Brookhaven, National Laboratory (US): PYamin Cornell University (US): D G Cassel DESY Laboratory (Germany): Ilka Flegel, P Waloschek Fermi National Accelerator Laboratory (US): Judy Jackson GSI Darmstadt (Germany): G Siegert INFN -
A Half-Century with Solar Neutrinos*
REVIEWS OF MODERN PHYSICS, VOLUME 75, JULY 2003 Nobel Lecture: A half-century with solar neutrinos* Raymond Davis, Jr. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA and Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, USA (Published 8 August 2003) Neutrinos are neutral, nearly massless particles that neutrino physics was a field that was wide open to ex- move at nearly the speed of light and easily pass through ploration: ‘‘Not everyone would be willing to say that he matter. Wolfgang Pauli (1945 Nobel Laureate in Physics) believes in the existence of the neutrino, but it is safe to postulated the existence of the neutrino in 1930 as a way say that there is hardly one of us who is not served by of carrying away missing energy, momentum, and spin in the neutrino hypothesis as an aid in thinking about the beta decay. In 1933, Enrico Fermi (1938 Nobel Laureate beta-decay hypothesis.’’ Neutrinos also turned out to be in Physics) named the neutrino (‘‘little neutral one’’ in suitable for applying my background in physical chemis- Italian) and incorporated it into his theory of beta decay. try. So, how lucky I was to land at Brookhaven, where I The Sun derives its energy from fusion reactions in was encouraged to do exactly what I wanted and get paid for it! Crane had quite an extensive discussion on which hydrogen is transformed into helium. Every time the use of recoil experiments to study neutrinos. I imme- four protons are turned into a helium nucleus, two neu- diately became interested in such experiments (Fig. -
The Links of Chain of Development of Physics from Past to the Present in a Chronological Order Starting from Thales of Miletus
ISSN (Online) 2393-8021 IARJSET ISSN (Print) 2394-1588 International Advanced Research Journal in Science, Engineering and Technology Vol. 5, Issue 10, October 2018 The Links of Chain of Development of Physics from Past to the Present in a Chronological Order Starting from Thales of Miletus Dr.(Prof.) V.C.A NAIR* Educational Physicist, Research Guide for Physics at Shri J.J.T. University, Rajasthan-333001, India. *[email protected] Abstract: The Research Paper consists mainly of the birth dates of scientists and philosophers Before Christ (BC) and After Death (AD) starting from Thales of Miletus with a brief description of their work and contribution to the development of Physics. The author has taken up some 400 odd scientists and put them in a chronological order. Nobel laureates are considered separately in the same paper. Along with the names of researchers are included few of the scientific events of importance. The entire chain forms a cascade and a ready reference for the reader. The graph at the end shows the recession in the earlier centuries and its transition to renaissance after the 12th century to the present. Keywords: As the contents of the paper mainly consists of names of scientists, the key words are many and hence the same is not given I. INTRODUCTION As the material for the topic is not readily available, it is taken from various sources and the collection and compiling is a Herculean task running into some 20 pages. It is given in 3 parts, Part I, Part II and Part III. In Part I the years are given in Chronological order as per the year of birth of the scientist and accordingly the serial number. -
International Union of Pure and Applied Physics
International Union of Pure and Applied Physics Newsletter SEPTEMBER President: Michel Spiro • Editor-in-Chief: Kok Khoo Phua • Editors: Maitri Bobba; Judy Yeo 2020 IUPAP Office hosted & supported by: NANYANG TECHNOLOGICAL UNIVERSITY, SINGAPORE PRESIDENTS' NOTE The Presidents believe that IUPAP should develop a Strategic Plan to build on that by finding more ways to incorporate (below) to guide its development through the start of its second these young physicists into our activities. century, and have prepared this preliminary version. It is distributed in this Newsletter with the request that all stakeholders offer their 4. IUPAP has long worked to ensure that the interaction proposals for changes in content and emphasis. It is anticipated that between physicists from different countries, which is the Strategic Plan will be further discussed in the Zoom meeting of key for the progress of physics, can continue even when the Council and Commission Chairs in October, so your reply should relations between the countries are strained. In the be received before 25th September 2020 to be part of the input for present international climate, this activity is as important those discussions. as it was 50 years ago. New activities being developed to play a key role in IUPAP. The Future of IUPAP During the three years between now and 2023, the year of the 1. IUPAP is collaborating with and leading fellow unions centenary of our first General Assembly, the International Union and other partners to promote and to organise an of Pure and Applied Physics (IUPAP) will be continuing its major International Year for Basic Sciences for Sustainable initiatives of the past, commencing new activities, and working Development in 2022. -
American Association of Physics Teachers 2008 Annual Report
American Association of Physics Teachers 2008 report annual Executive Board President Vice Chair of Section Lila M. Adair Representatives Piedmont College Mary Mogge Monroe, GA California State Polytechnic University President-Elect Pomona, CA Alexander Dickison Seminole Community At-Large Board Members College Gordon Ramsey Sanford, FL Loyola University Chicago Frankfurt, IL Vice-President David M. Cook Dwain Desbian Lawrence University Estrella Mountain Community Appleton, WI College Buckeye, AZ Secretary Steven Iona Elizabeth B. Chesick University of Denver Baldwin School Denver, CO Haverford, PA Treasurer Ex-Officio Member Editor Paul W. Zitzewitz American Journal University of of Physics Michigan - Dearborn Jan Tobochnik Dearborn, MI Kalamazoo College Kalamazoo, MI Past President Harvey Leff Ex-Officio Member Editor California State The Physics Teacher Polytechnic University Karl C. Mamola Pomona, CA Appalachian State University Boone, NC Chair of Section Representatives Ex-Officio Member Alan Gibson Executive Officer Connect2Science Warren W. Hein Rochester Hills, MI 2008 2008 report annual 2008 in Summary Presidential Statement 2 Executive Officer Statement 3 Leadership and Service 4 Publications 5 Membership 7 Major Events 8 Programs 9 Collaborative Projects 10 High School Physics Photo Contest 13 Awards and Grants 14 Fundraising 16 Committee Contributions 18 AAPT Sections 20 Financials 22 Presidential Statement AAPT is a truly unique began for a Two-Year College New Faculty Workshop. The organization. For over thirty PTRA program began to wind down in the final stage of the NSF years, it has been my personal grants that began in 1985, and looked at ways of reconfiguring inspiration, a place to meet itself through other successful programs and began offering and share with other physics special workshops for AAPT sections. -
Neutrino “Beams”
Neutrino “Beams” A. Marchionni, Fermilab June 25, 2015 1 The Nobel ν prizes Physics 1995 FREDERICK REINES for the detection of the neutrino (1953-1956) Physics 1988 LEON M LEDERMAN, MELVIN SCHWARTZ and JACK STEINBERGER for the neutrino beam method and the demonstration of the doublet structure of the leptons through the discovery of the muon neutrino (1962) Physics 2002 RAYMOND DAVIS Jr. and MASATOSHI KOSHIBA for pioneering contributions to astrophysics, in particular for the detection of cosmic neutrinos Homestake (1970-1995), Kamiokande (1983), Kamiokande-II (1985), Super-Kamiokande (1996) 2 Beta Decay Electron capture (EC) 3 A few beta decay examples − - n → p e ν e (100% β ) Tritium decay (100% β-) 7Be decay (100% EC) 4 Reactor anti-neutrinos The spectrum is a sum over beta decays of fragments produced in the thermal neutron induced fission 5 Energy Production in Stars 6 Reaction ν flux % total Solar Neutrinos (cm -2 s- ν flux 1) p + p →→→2H + e + + ννν 6.04x10 1 92% e 0 7 - 7 9 Be + e →→→ Li + νννe 4.55x10 7% - 2 8 p + e + p →→→ H + νννe 1.45x10 0.2% 8 8 + 6 B →→→ Be* + e + νννe 4.72x10 0.007 % 7 Atmospheric neutrinos T.Kajita, Y. Totsuka Rev. Mod. Phys. 73 (2001) 85 First atmospheric ν neutrino experiments in the 1960s , deep underground (~8000 mwe). Measured ν events occurring in the rock and crossing the detector. Particles traversing the detectors almost horizontally (or upward going) were atmospheric ν’s • Kolar Gold Field (KGF) in South India • East Rand Proprietary Mine in South Africa From the early 1980s, several proton decay experiments began operation. -
James W. Rohlf Boston University
Institute for Theoretical and Experimental Physics, Moscow, 3 December 2003 20 The Quest for 10− Meters James W. Rohlf Boston University Rohlf/ITEP – p.1/76 ITEP Forces and Distance Rohlf/ITEP – p.2/76 ITEP Discovery of the electron 1897 J. J. Thompson ...birth of the spectrometer! Note: The charge to mass depends on the speed, which is hard to measure! The ingenuity of the experiment was to add a magnetic field to cancel the electric deflection. Rohlf/ITEP – p.3/76 ITEP Electron e/m J.J. Thomson The electron gets acceleration 2 vy vyvx vx tan θ a = t = L = L with B field on and no deflection, E vx = B e a Etanθ m = E = LB2 E is field that produces deflection θ B is field that produces no deflection. Rohlf/ITEP – p.4/76 ITEP Classical electron radius Big trouble at a distance where electrostatic potential energy exceeds electron mass energy: ke2 2 r > mc This occurs when ke2 1:44 eV nm 15 r < = · 3 10− m mc2 0:511 MeV ' × Rohlf/ITEP – p.5/76 ITEP Rutherford scattering 1909 The detector consisted of a fluorescent screen and Hans Geiger looking through a microscope for light flashes. This experience is, no doubt, what motivated him to invent the Geiger counter! Rohlf/ITEP – p.6/76 ITEP Cross section definition transition rate σ = incident flux effective area of target Examples: 28 2 nuclear barn (b) = 10− m ∼ pp (high energy) 50 mb ∼ W/Z0 discovery at SPS nb ∼ rare processes at LHC fb ∼ Rohlf/ITEP – p.7/76 ITEP Rutherford scattering dσ 2 ~c 2 1 d cos θ α (E ) (1 cos θ)2 ∼ k − (∆p)2 = 2(mv)2(1 cos θ) − dσ = 2πbdb Can only happen if: force is 1/r2 • nucleus is pointlike • J=1, m=0 photon • Rohlf/ITEP – p.8/76 ITEP Davisson-Germer discovering electron waves “We have become accustomed to think of the atom as rather like a solar system.. -
Teoretisk Fysik
1 Teoretisk fysik Institutionen för fysik Helsingfors Universitet 12.11. 2008 Paul Hoyer 530013 Presentation av de fysikaliska vetenskaperna (3 sp, 1 sv) Kursbeskrivning: I kursen presenteras de fysikaliska vetenskaperna med sina huvudämnen astronomi, fysik, geofysik, meteorologi samt teoretisk fysik. Den allmänna studiegången presenteras samt en inblick i arbetsmarkanden för utexaminerade fysiker ges. Kursens centrala innehåll: Kursen innehåller en presentation av de fysikaliska vetenskapernas huvudämnes uppbyggnad samt centrala forskningsobjekt. Presentationen ges av institutionens lärare samt av utomstående forskare och fysiker i industrin. Centrala färdigheter: Att kunna tillgodogöra sig en muntlig presentation sam föra en diskussion om det presenterade temat. Kommentarer: På kursen kan man även behandla speciella ämnesområden, såsom: speciella forskningsområden inom fysiken samt specifika önskemål inom studierna. 2 Bakgrund Den fortgående specialiseringen inom naturvetenskaperna ledde till att teoretisk fysik utvecklades till ett eget delområde av fysiken Professurer i teoretisk fysik år 1900: 8 i Tyskland, 2 i USA,1 i Holland, 0 i Storbritannien Professorer i teoretisk fysik år 2008: Talrika! Även forskningsinstitut för teoretisk fysik (Nordita @ Stockholm, Kavli @ Santa Barbara,...) Teoretisk fysik är egentligen en metod (jfr. experimentell och numerisk fysik) som täcker alla områden av fysiken: Kondenserad materie Optik Kärnfysik Högenergifysik,... 3 Kring nyttan av teoretisk fysik Rutherford 1910: “How can a fellow sit down at a table and calculate something that would take me, me, six months to measure in the laboratory?” 1928: Dirac realized that his equation in fact describes two spin-1/2 particles with opposite charge. He first thought the two were the electron and the proton, but it was then pointed out to him by Igor Tamm and Robert Oppenheimer that they must have the same mass, and the new particle became the anti-electron, the positron.