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People and Things People and things In March, Jiro Kondo (centre), President of the Science Council of Japan, visited CERN, where he was shown the muon spectrometer of the new Chorus neutrino experiment by Klaus Winter (left) and Shigeki Aoki of Kobe. (Photo CERN HI22.3.93) would then overlap. The snake team decided to study overlapping depolarizing resonances by building a 25 kV radiofrequency solenoid magnet to create an depo­ larizing resonance in the Indiana Cooler Ring. This new resonance was then forced to overlap with the nearby imperfection depolarizing resonance by varying the solenoid's frequency. The experimenters found a sharp destructive interference between the two overlapping resonances; while this still cannot be calculated theoretically, such effects are well known in physics. Fortu­ nately the Siberian snake was powerful enough to overcome com­ pletely both overlapping resonances and all their interference effects, keeping the beam fully polarized. On people tU IIUUIC7CÏI ClsDLI /JO/I/O dl (U / UsJ ClkJlUiy The potency of these serpents is to communicate the joy and excite­ being closely followed at accelerator CERN Director General Carlo ment of science to a diversity of laboratories around the world. Rubbia, together with François Gros, audiences. ' Meanwhile, Krisch and his col­ Director of the Institut Pasteur in Recent American Institute of Physics leagues assembled the SPIN Col­ Paris, and distinguished Belgian awards included the Compton Award laboration to encourage the use of chemist llya Prigogine, will advise Siberian snakes at TeV accelerators. to Victor Weisskopf, doyen of the European Commissioner for Re­ world particle physics community, This Collaboration (Michigan/Indiana/ search and Educational Policies Fermilab/North Carolina/IHEP- recognizing his leadership through­ Antonio Ruberti on new directions for Protvino/J IN R-Dubna/Moscow/I N R- out the world in advancing science, European Community research Troitsk/KEK/Kyoto) contains about 40 promoting peace and seeking solu­ policy. Carlo Rubbia's special con­ accelerator experts, 40 spin experi­ tions to world problems'. The citation cern will be the internationalization of menters and one theorist. The underlined his roles as CERN Direc­ research and the development of SSC's 20 TeV lattices could include tor General from 1961-65 and as major world-scale projects. more than 50 empty straight sec­ founder of the US High Energy tions, typically 20 metres long, for Physics Advisory Panel (HEPAP) as subsequent installation of many well as his contributions as teacher Siberian snakes. US awards and author. In the 1930s, Weisskopf worked with Schrôdinger, For Fermilab, SPIN produced a Heisenberg, Bohr and Paul! before 146-page report - Accelerating Prominent astrophysicist David N. Polarized Protons to 150 GeV in the Schramm of Chicago has been moving to the US in 1937. Fermilab Main Injector- and has just awarded the 1993 Julius Edgar started work for a similar report on Lilienfeld Prize of the American The American Institute of Physics the possibilities for accelerating and Physical Society. As well as recog­ Science Writing Prize has gone to storing polarized protons in the nizing contributions to physics, the author and science historian David Tevatron Collider. prize is awarded for skills in present­ Cassidy for his book 'Uncertainty, ing science. Schramm's citation The Life And Science of Werner reads Tor his manifold contributions Heisenberg' (W.H. Freeman, 1991). 22 CERN Courier, May 1993 ; 4 ' ' *'mmÉ&mm 00 g> CO ft ÉHBFT oo ±1 LO ^ ._ 00 W £ x O <° CO 5 is • Eg W CD CO 9- (/) I- 29a Circle advertisement number on reader service form Rear panel of one of the four concially arranged TRD wire chambers This project was commissioned by the University of Bonn, designed and completely produced together with the University and installed at DESY Hamburg. All components were produced by the glass fibre compression process, the outer surfaces were copperplated and the components were bonded and machined so that they were ready to install. Stesalit AG 1) The superimposed detail in the top Kunststoffwerk picture shows a complicated construction in conjunction with CH-4234 Zullwil SO high precision. Telephone 41.61.791 06 01 Fax 41.61.791 06 04 24b Circle advertisement number on reader service form CERN Courier, May 1993 23 Aleph laugh. Successive spokesmen of the Aleph experiment at CERN's LEP electron- positron collider enjoy a joke - original spokesman Jack Steinberger (centre), his successor Jacques Lefrançois (left) and newly appointed Lorenzo Foa (right). Aleph notable Sau-Lan Wu also saw the joke. External correspondents Argonne National Laboratory, (USA) D. Ayres Brookhaven, National Laboratory, (USA) P. Yamin CEBAF Laboratory, (USA) S. Corneliussen Cornell University, (USA) D. G. Cassel DESY Laboratory, (Germany) P. Waloschek Fermi National Accelerator Laboratory, (USA) J. Cooper, J. Holt GSI Darmstadt, (Germany) G. Siegert INFN, (Italy) A. Pascolini Retirements Polykarp Kusch 1911-93 IHEP, Beijing, (China) Qi Nading Earlier this year Bill Kirk retired from Polykarp Kusch, best known for his JINR Dubna, (USSR) SLAC after 37 years. Starting as measurement of the electron mag­ B. Starchenko KEK National Laboratory, (Japan) assistant to Edward Gintzon in 1956, netic moment, for which he shared S. Iwata he went on to serve unobtrusively but the 1955 Nobel Physics Prize with Lawrence Berkeley Laboratory, (USA) with total dedication in a number of Willis Lamb, died on 20 March, aged B. Feinberg key roles. The prose of the 1957 82. After starting his teaching career Los Alamos National Laboratory, (USA) proposal for the two-mile linear in 1936, he was diverted into wartime C. Hoffmann accelerator was largely his work. research. In 1946 he joined Colum­ Novosibirsk, Institute, (USSR) In 1974 he launched Beam Line, bia, where he was twice Physics V. Balakin SLAC s commendable in-house Chairman and was voted the Great Orsay Laboratory, (France) journal, and went on to take charge Teacher Award by students in 1959. Anne-Marie Lutz of all SLAC's information activities. A PSI Laboratory, (Switzerland) R. Frosch keen sportsman, he helped organize the Laboratory's strong tradition of Rutherford Appleton Laboratory, (UK) Jacky Hutchinson participator sport. Physics teaching Saclay Laboratory, (France) Elisabeth Locci IHEP, Serpukhov, (USSR) Machine specialist Donatus Dégèle In several regions of the world, there Yu. Ryabov has retired from DESY after 32 is increasing awareness of the Stanford Linear Accelerator Center, (USA) years. After valuable contributions to importance of physics teaching. For M. Riordan the building and operation of the its part, the European Physical Superconducting Super Collider, (USA) DORIS and PETRA storage rings, he Society has set up a Forum on N. V. Baggett played a leading role in the design Education', under the joint chairman­ TRIUMF Laboratory, (Canada) and construction of proton facilities ship of particle physicists G. Tibell M. K. Craddock for the HERA electron-proton collider. (Uppsala) and G. Marx (Budapest). 24 CERN Courier, May 1993 Wideband PWM Op Amp' Delivers 49kW For particle beam steering & focus with 5mA/°C stability—or deflection and scanning with 9V/us slew rate. Units parallel for higher power output. Model Continuous Output1 220, 230 ±75V @ +12A +150V @ ±10A 231, 261 +160V @ +55A ±330V @ +25A 233.263 +160V@±110A +330V @ +50A 234-1,264-1 ±160V@±180A ' +330V @ +90A 234.264 ±160V@+240A ±330V @ ±120A 235.265 +160V@+300A ±330V @+150A Model * Rating for IPEAK is >2x ICONT depending on duty factor and pulse width. 264 Copley Controls' wideband, Spécifications include DC-4 kHz Copley filtered PWM power amplifiers bandwidth*, 0.2% THD, and look—-to the load^like linear 0.5mV/°C stability. Low heat Controls amplifiers. The 80 kHz switch­ dissipation yields >94% effi­ ing frequency enables power ciency. Applications include iCorp. filters to be built into the beam steering, motion control, 410 University Avenue amplifier's case. MOSFET vibration suppression, magnetic Westwood, MA 02090 output bridge permits parallel­ lévitation, and ripple/harmonic ing for high current. Copley neutralization. Improved cur­ TEL (617) 329-8200 • FAX (617) 329-4055 amplifiers are ideal for driving rent mode DC stability can be Company Contact: Melvin A. Berger a wide range of inductive loads. achieved with external shunt. 9 Circle advertisement number on reader service form KAPTON Insulation for super-conductors at cryogenic temperatures Main Superconducting Coil The remarkable properties of KAPTON The new KAPTON CI System has been Polyimide Film from Du Pont make it specifically developed as insulation for the ideal insulation material at super-conductors in cryogenic cryogenic temperatures. Excellent per­ applications. KAPTON CI offers formance characteristics at extremes of resistance to radiation, creep, cold flow temperature and unique physical and and cut-through. It is now commercially dielectric properties have made available in both customised film KAPTON the material of choice in thickness and adhesive coatings. engineering design for over 25 years. To find out more about KAPTON CI please call or write. ® Du Pont's registered trademark KAPTON Solving engineering problems at every level. Du Pont Imaging Systems, KAPTON High Performance Films, 2, chemin du Pavillon, CH-1218 Le Grand Saconnex, Geneva - Tel (022) 717 5533 - Fax (022) 717 6152 43 Circle advertisement number on reader service form CERN Courier, May 1993 25 DSP Solutions for VMEbus Powered Crates Further to all our CERN approved CERN-Spec Crates NIM-, CAMAC-, FAST BUS-, VMEbus 422/430 Wes-Crates supplies other Crates based on our Systems Some of this Crates are shown here: VMEbus-Crates 6u height, 7 slot with cooling. Insert modules for disk/ drive. Backplane: Jl, J2 (like Spec V-422) orJl, J2 and JAUX (like Spec V-430) Contrl./monitoring like SpecV-425. Interchangeable system to our CERN-Spec power supplies for CERN- Spec Crates V-422 / v-430 *WfïMIWlllIfll^~ VMEbus-Crates 11 u height, 21 slot for VME * ,4f!!lfcN4iiltUVt modules 366,7 mm height, Hardware 340/400/460 mm depth.
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