People and Things
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Igor Tamm 1895 - 1971 Awarded the Nobel Prize for Physics in 1958
Igor Tamm 1895 - 1971 Awarded the Nobel Prize for Physics in 1958 The famous Russian physicist Igor Evgenievich Tamm is best known for his theoretical explanation of the origin of the Cherenkov radiation. But really his works covered various fields of physics: nuclear physics, elementary particles, solid-state physics and so on. In about 1935, he and his colleague, Ilya Frank, concluded that although objects can’t travel faster than light in a vacuum, they can do so in other media. Cherenkov radiation is emitted if charged particles pass the media faster than the speed of light ! For this research Tamm together with his Russian colleagues was awarded the 1958 Nobel Prize in Physics. Igor Tamm was born in 1895 in Vladivostok when Russia was still ruled by the Tsar. His father was a civil engineer who worked on the electricity and sewage systems. When Tamm was six years old his family moved to Elizavetgrad, in the Ukraine. Tamm led an expedition to He graduated from the local Gymnasium in 1913. Young Tamm dreamed of becoming a revolutionary, but his father disapproved . However only his mother was able to convince him to search for treasure in the Pamirs change his plans. She told him that his father’s weak heart could not take it if something happened to him. In 1923 Tamm was offered a teaching post at the Second Moscow University and later he was And so, in 1913, Tamm decided to leave Russia for a year and continue his studies in Edinburgh. awarded a professorship at Moscow State University. -
People and Things
People and things On 15 April, Haim Harari of the Weizmann Institute, Israel, was guest speaker at a symposium to mark 20 years of accelerator operation at the Paul Scherrer Institute, Maurice Jacob's roving camera caught Murray Villigen, Switzerland. Gell Mann in a London pub with the manu (Photo Armin Muller) script of his book 'The Quark and the Jaguar'. 20 years of PSI In April the Swiss Paul Scherrer Institute celebrated 20 years of accelerator operations. Originally built for particle research, these facilities now extend over a wide spectrum of applications, from molecular structure to cancer therapy. Each year over 400 visiting researchers make use of PSI particle beams. Meetings An international symposium on strangeness and quark matter will be held from 1-5 September in Crete, covering 1. strangeness and quark- gluon plasma, 2. strangeness con LAPP, Annecy, well known authority French Academy of Sciences densation, 3. strange astrophysics, 4. on non-Abelian gauge theories, and strangelets, 5. dedicated instrumen Michel Davier, long-time specialist in tation for strangeness and quark Among the new corresponding electron-positron collision physics matter. Information from the Secre members of the French Academy of and former Director of the Orsay tariat, University of Athens, Physics Sciences (Academie des Sciences Linear Accelerator Laboratory. Other Dept., Nuclear & Particle Physics de Paris) are Raymond Stora of new members are Alain Aspect, Division, Panepistimioupolis, Greece- 15771 Athens, tel. (30-1)7247502, 7243362, 7243143, fax (30- 1)7235089, email gvassils ©atlas, uoa.ariadne-t.gr At a special colloquium held at CERN on 20 April to mark Carlo Rubbia's 60th birthday and the tenth anniversary of his Nobel Prize award with Simon van der Meer, left to right - Canadian TRIUMF Laboratory Director and former UA1 co-spokesman Alan Astbury, LHC Project Director Lyn Evans, Carlo Rubbia, Director General Chris Llewellyn Smith, and former UA 1 co-spokesman John Dowel I. -
Subnuclear Physics: Past, Present and Future
Subnuclear Physics: Past, Present and Future International Symposium 30 October - 2 November 2011 – The purpose of the Symposium is to discuss the origin, the status and the future of the new frontier of Physics, the Subnuclear World, whose first two hints were discovered in the middle of the last century: the so-called “Strange Particles” and the “Resonance #++”. It took more than two decades to understand the real meaning of these two great discoveries: the existence of the Subnuclear World with regularities, spontaneously plus directly broken Symmetries, and totally unexpected phenomena including the existence of a new fundamental force of Nature, called Quantum ChromoDynamics. In order to reach this new frontier of our knowledge, new Laboratories were established all over the world, in Europe, in USA and in the former Soviet Union, with thousands of physicists, engineers and specialists in the most advanced technologies, engaged in the implementation of new experiments of ever increasing complexity. At present the most advanced Laboratory in the world is CERN where experiments are being performed with the Large Hadron Collider (LHC), the most powerful collider in the world, which is able to reach the highest energies possible in this satellite of the Sun, called Earth. Understanding the laws governing the Space-time intervals in the range of 10-17 cm and 10-23 sec will allow our form of living matter endowed with Reason to open new horizons in our knowledge. Antonino Zichichi Participants Prof. Werner Arber H.E. Msgr. Marcelo Sánchez Sorondo Prof. Guido Altarelli Prof. Ignatios Antoniadis Prof. Robert Aymar Prof. Rinaldo Baldini Ferroli Prof. -
Poster: G-2 Measuring the Muon [Pdf]
g-2 measuring the muon In the 1950s the muon was still a complete enigma. Physicists could In 1959, six physicists joined forces to try to measure the muon’s The second g-2 experiment started in 1966 under the leadership magnetic moment using CERN’s first accelerator, the Synchrocyclotron. of Francis Farley and it achieved a precision 25 times higher than not yet say with certainty whether it In 1961, the team published the first direct measurement of the muon’s the previous one. This allowed phenomena predicted by the theory anomalous magnetic moment to a precision of 2% with respect to of quantum electrodynamics to be observed with a much greater the theoretical value. By 1962, this precision had been whittled down sensitivity — vacuum polarisation for instance, which is the momentary was simply a much heavier electron to just 0.4%. This was a great success since it validated the theory of appearance of ‘virtual’ electron and antielectron pairs with very short quantum electrodynamics. As predicted, the muon turned out to be lifetimes. The experiment also revealed a quantitative discrepancy a heavy electron. with the theory and thus prompted theorists to re-calculate their or whether it belonged to another predictions. species of particle. g-2 was set up to “g-2 is not an experiment: it is a way of life.” John Adams test quantum electrodynamics, which predicts, among other things, an A third experiment, with a new technical approach, was launched in anomalously high value for the muon’s 1969, under the leadership of Emilio Picasso. -
Vertex Detectors - a Historical Overview
Vertex Detectors - a historical overview Chris Damerell (RAL, Open U and Oxford U) CONTENTS • History from perspective of our RAL group – unavoidably biased … • Also, developments under study by our new collaboration (all pixel-based): • detectors for particle tracking systems with enhanced performance (notably much reduced material) • X-ray detectors for 4th generation light sources (FELs including UKFEL if it happens) • detectors for super-resolution optical microscopy 24th August 2016 RAL PPD seminar Chris Damerell 1 1969 Expt S120. Hypercharge exchange processes at CERN PS. Tony G, Fred W, Blair Ratcliff Clean test of the bootstrap theory of hadronic interactions Ideas for a focusing spectrometer for SPS startup, to definitively test this theory Need for few mm precision tracking … 1970 Supported by Godfrey Stafford (amazingly, given his challenges when appointed Director of RHEL in 1969) - invited talk to the Lab’s Scientific Policy Committee Visit to Alvarez group; initiated then shelved ideas for liquid xenon MWPC .. 1972 Bootstrap theory was disintegrating without our help. We joined CERN-Munich group to create the ACCMOR Collaboration, Experiment WA3; relatively conventional physics (meson spectroscopy with multi-particle spectrometer) but wonderful colleagues 24th August 2016 RAL PPD seminar Chris Damerell 2 Charm Pre-History and Discovery 1964 Bjorken and Glashow predicted the charm quark on general grounds. Key properties of D mesons included: decay nearly always to kaons, and with relatively high multiplicity. Physics case strengthened later by GIM mechanism to suppress strangeness-changing neutral currents. But as with the Higgs boson, experimental interest was at first non-existent – there was so much more ‘solid physics’ to do, such as discovering the patterns of meson and baryon resonances. -
Course Syllabus
University of Science and Technology of Hanoi Address: Building 2H, 18 Hoang Quoc Viet, Cau Giay, Hanoi Telephone/ Fax: +84-4 37 91 69 60 Email: [email protected] Website: http://www.usth.edu.vn COURSE SYLLABUS Subject: Intrumentation in Ground and Academic field: Astronomy Space Astrophysics Lecturer: Dr. Pham Ngoc Diep Phone: 01689677899 E-mail: [email protected] Academic year: 2013-2014 COURSE DESCRIPTION Credit points 2 Level Undergraduate Teaching time University of Science and Technology of Hanoi Location Lecture 16 hrs Exercises 8 hrs Time Commitment Practicals 6 hrs Total 30 hrs elementary of waves, classical mechanics, quantum mechanics, nuclear Prerequisites physics and particle physics Recommended Knowledge from Prof. Quynh Lan’s lectures background knowledge This course involves an elementary introduction to astrophysics, cosmology and instrumentation in ground and space astrophysics. The logic is that students should know about the basics of astrophysics and cosmology, the major unanswered questions in the fields. Therefore, they will understand why, what and how we measure astrophysical quantities. Emphases are on understanding the principles of detecting electromagnetic waves at different wavelengths and some different Subject description: particles. It is an exploratory, first course in instrumentation designed primarily for students planning to enrol in the regular-program astrophysics or related field such as space and application courses upon completion of this course. However, it also meets the needs of many students with other interests. Each UNIT is planed to be discussed in 2 hours. With practical work and/or visit to astrophysics labs, students will see in reality how a telescope works, they will have chance to operate it, take data and make some simple data analysis. -
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! -
Supplementvolum-E18 Nu-Mber-41989 .__L,___Society
ISSN 0739-4934 NEWSLETTER I IISTORY OF SCIENCE SUPPLEMENTVOLUM-E18 NU-MBER-41989 .__L,___SOCIETY - WELCOME TO GAINESVILLE HSS EXECUTIVE BY FREDERICK GREGORY COMMITTEE "A SOPI-llSTICATED SLICE of small-town south": so wrote Jonathan Lerner PRESIDENT about Gainesville for Washington Post readers this past spring. Like the majority MARY JO NYE, University of Oklahoma of visitors to Gainesville, Lerner was impressed with the topography of the city, VICE-PRESIDENT which forms a hammock-a dry area, relatively higher than its surroundings, STEPHEN G. BRUSH, University of Maryland that can support hardwood trees. Residents of Gainesville are enormously proud of the extensive canopy that covers 46 percent of their town, the highest per EXECUTIVE SECRETARY MICHAEL M. SOKAL, Worcester centage of any Florida city. In addition to the majestic live oaks, the southern Polytechnic Institute pine, and a variety of palm trees, dogwoods and magnolias are also plentiful. TREASURER Unfortunately the HSS Annual Meeting is held at a time of year that misses the MARY LOUISE GLEASON, New York City blossoms of our giant azaleas, some older ones of which are as high as roof tops. EDITOR f obvious interest to historians of science is nearby Paynes Prairie, an 18,000- RONALD L. NUMBERS, University of acre wildlife preserve whose zoological and botanical life was described in vivid Wisconsin-Madison detail by William Bartram after his travels through the region in 1774. Meeting sessions will be held on the campus of the University of Florida, which, at least in this part of the country, is never to be mixed up with Florida State University in Tallahassee. -
The 1984 Nobel Prize in Physics Goes to Carlo Rubbia and Simon Vm Der Meer: R
arrent Comments” EUGENE GARFIELD INSTITUTE FOR SCIENTIFIC INFORMATION* 3501 MARKET ST,, PHILADELPHIA, PA !9104 The 1984 Nobel Prize in Physics Goes to Carlo Rubbia and Simon vm der Meer: R. Bruce Merrifield Is Awarded the Chemistry Prize I Number 46 November 18, 1985 Last week we reviewed the 1984 Nobel Rubbia, van der Meer, and the hun- laureates in medicine: immunologists dreds of scientists and technicians at Niels K. Jerne, Georges J.F. Kohler, and CERN were seeking the ultimate confir- C6sar Milstein. 1 In this week’s essay the mation of what is known as the electro- prizewinners in physics and chemistry weak theory. Thk theory states that two are discussed. of the fundamental forces—electromag- The 1984 physics prize was shared by netism and the weak force-are actually Carlo Rubbia, Harvard University and facets of the same phenomenon. The the European Center for Nuclear Re- 1979 Nobel Prize in physics was shared search (CERN), Geneva, Switzerland, by Sheldon Glashow and Steven Wein- and Simon van der Meer, also of CERN. berg, Harvard, and Abdus Salam, Impe- The Nobel committee honored “their rial College of London, for their contri- decisive contributions.. which led to the butions to the eiectroweak theory. I dk- discovery of the field particles W and Z, cussed their work in my examination of communicators of the weak interac- the 1979 Nobel Iaureates.s tion. ”z The 1984 Nobel Prize in chemis- The daunting task facing the scientists try was awarded to R. Bruce Mertileld, at CERN was to find evidence of the sub- Rockefeller University, New York, for atomic exchange particles that commu- his development of a “simple and in- nicate the weak force. -
1 Nothing Is New Under the Sun ! Prof. Dr. Dr. Carlo Rubbia Scientific
Nothing is new under the Sun ! Prof. Dr. Dr. Carlo Rubbia Scientific Director, Institute for Advanced Sustainability Studies e.V. Potsdam, Germany -Accompanying document to Prof. Rubbia’s keynote address during the 3rd Dii Desert Energy Conference (Berlin, November 7-9 2012). The beginning of the practical use of solar power goes back some 23 centuries ago with Archimedes of Syracuse, (287 BC to 212 BC) in sunny Sicily. Mathematician, physicist, engineer, inventor and astronomer, he has been one of the leading scientists of the classical antiquity. The written work of Archimedes has not survived as well as that of Euclid, and seven of his treatises are known to have existed only through references made to them by other authors. Only few details are known. However, the relatively few copies of Archimedes' written work that survived through the Middle Ages were an influential source of ideas for scientists during the Renaissance. His contributions in mathematics have been immense: the initiator of the infinitesimals, anticipating the modern calculus of the ratio between the square of the radius and the area of a circle, the quadrature of a parabola as the solution of an infinite series, the centre of gravity of geometric figures and so on. The Fields Medal, the equivalent of the Nobel in mathematics carries his portrait along with a carving illustrating his proof on the sphere and the cylinder. The inscription is a quote attributed to him, which reads in Latin: "Transire suum pectus mundoque potiri" (Rise above oneself and grasp the world). Among his advances in physics are the foundations of hydrostatics, refraction and parabolic concentration of light, statics and an explanation of the principle of the lever, where he said “Give me a place to stand on, and I will move the Earth”. -
Finding the W and Z Products, Etc
CERN Courier May 2013 CERN Courier May 2013 Reminiscence Anniversary on precisely the questions that the physicists at CERN would be interested in: the cross-sections for W and Z production; the expected event rates; the angular distribution of the W and Z decay Finding the W and Z products, etc. People would also want to know how uncertain the predictions for the W and Z masses were and why certain theorists (J J Sakurai and James Bjorken among them) were cautioning that the masses could turn out to be different. The writing of the trans- parencies turned out to be time consuming. I had to make frequent revisions, trying to anticipate what questions might be asked. To Thirty years ago, CERN made scientifi c make corrections on the fi lm transparencies, I was using my after- shave lotion, so that the whole room was reeking of perfume. I history with the discoveries of the W and was preparing the lectures on a day-by-day basis, not getting much sleep. To stay awake, I would go to the cafeteria for a coffee shortly Z bosons. Here, we reprint an extract from before it closed. Thereafter I would keep going to the vending the special issue of CERN Courier that machines in the basement for chocolate – until the machines ran out of chocolate or I ran out of coins. commemorated this breakthrough. After the fourth lecture, the room in the dormitory had become such a mess (papers everywhere and the strong smell of after- shave) that I decided to ask the secretariat for an offi ce where I Less than 11 months after Lalit Sehgal’s visit to CERN, Carlo could work. -
The Discovery of Cherenkov Radiation Roger Huang the Discovery of Cherenkov Radiation
The Discovery of Cherenkov Radiation Roger Huang The Discovery of Cherenkov Radiation Roger Huang April 22, 2020 1/18 Cherenkov's Scientific Beginnings The Discovery of Cherenkov Pavel Alekseevich Cherenkov began postgraduate studies Radiation at the Institute for Physics and Mathematics in Leningrad Roger Huang in 1930, and began working under direct supervision of Sergei Ivanovich Vavilov in 1932 This institute was transformed into the Lebedev Institute in Moscow in 1934, with Vavilov as director Cherenkov chose to study the luminescence of uranyl salt solutions under the gamma-ray radiation of radium 2/18 Investigating Luminescence The Discovery of Cherenkov Radiation Roger Huang Lumniscence is a weak glow caused when molecules are excited by some external source and then release light when decaying back to their ground state after some finite time This glow is weak, close to the human visibility threshold, and photomultipliers had not yet been developed Vavilov and Brumberg had developed the optical wedge method to quantify this glow, featuring the human eye has the measuring instrument 3/18 The Experimental Setup The Discovery of Cherenkov Radiation Vessel 1 contains the salt Roger Huang solutions under study, with slots for radium samples to be inserted below and to the side A Glan prism at 6 is used to measure polarization An optical wedge (opaque on one side and transparent on the other) is inserted into 4, moving perpendicular to this figure’s plane, to absorb some portion of the light 4/18 The Experimental Procedure The Discovery