(charmed quarks bound to anti- structure,spectra (EXAFS), dif­ time this year include 1200 MeV quarks), charmed particles, and fraction, small angle scattering, argon 40 (30 MeV/nuc), 756 MeV the tau lepton (heavy brother of crystal topography, and X-ray litho­ nitrogen 14.(54 MeV/nuc), and the muon and the electron) at col­ graphy. These will be used to do 648 MeV carbon 12 (54 MeV/nuc). lision energies between 3 and solid state physics, surface phy­ The new ECR source was built 5.6 GeV. sics, biology, medical science, at the Cyclotron Lab and is a large, Particles will be injected into the semiconductor physics and other 15 cm bore, permanent-magnet BEPC ring through a 200 metre research and development. sextupole, room temperature sole­ linear accelerator to take electrons The civil engineering work has noid, source. Injecting ECR beams and positrons to between 1.1 and progressed quite well. The into the cyclotron began in March 1.4 GeV. The ultimate energy will 200 metre tunnel of the injector and the source has been in use depend on the power output of has been completed and the klys­ ever since. klystrons now being built in China. tron gallery is near completion. All Performance with the ECR has So far, output of more than 20 Me­ tunnels and buildings will soon be been so successful that the original gawatts has been obtained. A pro­ complete. Magnets, accelerating plan for the K500 cyclotron to totype section of the electron tubes of the linear accelerator, inject into the next machine, the 90 MeV linac was completed at klystrons, etc., are now being built K800, is being revised to allow the end of 1984 and successfully in batch. BEPC is scheduled to be the two cyclotrons to operate inde­ tested. Maximum pulse is 500 mA: completed at the end of 1988. pendently, each with its own ECR energy spread for 200 mA pulse source. Construction of the second current is less than one per cent. From an article by Minghan Ye, ECR has begun; this will use super­ New innovations such as the ener­ Director of the Institute of High conducting coils for both solenoid gy 'doubler' with a quality factor Energy Physics, Academia Sinica, and sextupole so that the source of 105 and an energy multiplication Beijing, which appeared in the first can later be used at ultra-high mi­ factor of 1.4 have been used in edition of a new publication, Asia- crowave frequencies (around the prototype. Pacific Physics News, supported 30 GHz). The 240 metre circumference by UNESCO and edited by The past year has also seen storage ring fed by the linac will S. C. Lim of Universiti Kebangsaan much significant progress on con­ contain 40 bending magnets and Malaysia, Selangor, Malaysia. structing the superconducting 60 quadrupole magnets. Electrons K800 cyclotron. Landmarks were: and positrons collide at two inter­ trim coils (104 in all) custom- action points. Due to the tight bud­ MICHIGAN formed and fitted on the magnet get, only one will be exploited at pole tips; extensive field maps of the first stage of the project. New ion beams the main magnet giving excellent The detector will be a general results; the prototype radiofre- purpose magnetic spectrometer, The K500 superconducting cyclo­ quency final amplifier working in consisting of a drift chamber, a tron at the National Superconduct­ accord with design with all three time-of-flight counter, a shower ing Cyclotron Laboratory, Michigan final amplifiers complete and ready counter, a muon identifier and a State University, has recently ac­ for testing; and the r.f. resonator large magnetic coil of 4.5 kilo- celerated a number of newly avail­ assembly proceeding at a good gauss. The spectrometer will be able ions to record high single cy­ rate. K800 beam tests should be­ about 5 m long and 6 m in diamet­ clotron energies, thanks to a re­ gin next spring with first experi­ er, with a total weight of about cently installed Electron Cyclotron ments in the summer. 350 tons. Prototypes of compo­ Resonance (ECR) ion source and nents have been built and online its associated axial injection sys­ tests gave satisfactory results. tem. The heaviest-ion, highest- For the first phase of the project, total-energy beam so far has been synchrotron light beamlines and 1720 MeV krypton 86 experimental stations will be built (20 MeV/nuc), which was re­ to study photoelectron spectra, quested for an experiment in June. extended X-ray absorption fine Other new beams run for the first

22 CERN Courier, December 1986 i

Since the beginning, we've been an inquisitive company. A company with the drive to shape superconducting technology. Our innovative approach has resulted in our creating new products such as: Force-flow Niobium Tin, high current, fine filament Niobium Titanium, and mixed matrix superconductors. If your application requires a conductor with extraordinary design, dimension or performance qualities, our engineering staff will design one to your specifications. And that's why, we think, the more you know the more likely you'll go to Oxford. DO YOUR HOMEWORK AMD YOU'LL GO TO OXFORD Oxford Superconducting Technology 600 Milik Street, Carteret, New Jersey 07008, Telephone (201) 541-1300 Twx (710) 998-0492, Telex 844 142, Fax (201) 541-7769

New! From J^EEzG ESN CAMAC CONSTANT FRACTION DISCRIMINATOR

The new model CCF8000 features:

8 CFD channels in a V25 automatic walk adjustment For more information: CAMAC module internal shaping delay contact Alan Douglas or John Sanders 2 independent ECL outputs circuits under Telephone 089/92692-500 per channel walk less than 150 ps for ^EGzG ESN programmable threshold 100:1 range settings Multiplicity output Hohenlindener StraBe 12 • D-8000 Munchen 80 Telex 5 28 257 • Telefax 089 / 91012 83 programmable output OR output (Distributed by EG + G Ortec representatives widths Inhibit input worldwide) programmable output mask Test input W.A.S. Munich

CERN Courier, December 1986 23 TRIUMF CEIM COURIER MESON RESEARCH FACILITY

University of Alberta Simon Fraser University University of Victoria University of British Columbia Competition # 517-106 A unique advertising medium for Accelerator Physicists scientific and technical equipment The Accelerator Research Division at TRIUMF has openings for-phy- sicists or engineering physicists as Research Associates and Re­ search Scientists to participate in design studies of fast cycling high intensity proton synchrotrons for a kaon factory. Beam dynamics studies are of particular interest, including magnet lattice design, beam instabilities, etc. Candidates should have a Ph.D. or equivalent in physics or engineer­ ing. CERN COURIER is the internationally recognized Research Associate appointments are initially made for one year, renewable for a second year. Applicants should have good theore­ news magazine of high energy physics. Distributed tical abilities; some experience with accelerators would be desira­ to all the major Laboratories of the world active ble, especially in beam dynamics. in this dynamic field of fundamental research, it is Research Scientist positions are permanent staff appointments. compulsive reading for scientists, engineers, ad­ Applicants should have some years of relevant experience in an accelerator laboratory. Salary will depend on qualifications and ministrators, information media and buyers. Written experience. in simple language and published simultaneously Please reply in writing by January 15,1987, enclosing a curriculum in English and French it has become the natural vitae, a list of publications and the names of three referees to: communication medium for particle physicists in TRIUMF Personnel (Competition # 517), 4004 Wesbrook Mall, Vancouver, B.C. V6T 2A3. Europe, theUSA, theSovietUnion, Japan — every­ We offer equal employment opportunities to qualified where where the fundamental nature of matter is male and female applicants. studied.

Published from CERN, Switzerland, it also has correspondents in the Laboratories of Argonne, A comprehensive two-volume work Berkeley, Brookhaven, Cornell, Fermi, Los Alamos and Stanford in the USA, Darmstadt, DESY and constituting the definitive treatment Karlsruhe in Germany, Orsay and Saclay in France, of particle physics Frascati in Italy, Daresbury and Rutherford in the U. K., SIN in Switzerland, Dubna and Novosibirsk Concepts of Particle intheUSSR, KEKinJapan, TRIUMF in Canada and Physics: Volume Two Peking in China. Kurt Gottfried and Victor F. Weisskopf The annual expenditure on high energy physics This authoritative work retraces the material outlined in in Europe is about 1000 million Swiss francs. the first volume, but in far greater detail and with a much The expenditure in the USA is about $ 400 million. higher degree of sophistication. The authors, both eminent physicists, provide in-depth discussions of There is similar expenditure in the Soviet Union quantum electrodynamics, hadronic spectroscopy, quantum chromo-dynamics, deep inelastic scattering, and the Grand Unification Theory. CERN COURIER is the way into all high energy physics research Laboratories. If you have a 0 19 503393 0, 352 pp., illus., OUP USA, February 1987 £35 market in this field, there is no surer way to make your products known than by advertising in CERN COURIER. Concepts of Particle p^ Physics: Volume One Kurt Gottfried and Victor Weisskopf lA splendid review of subnuclear phenomena... provides All enquiries to: a sophisticated overview without a welter of details, that Advertising Manager will be stimulating and useful to those about to enter the Micheline Falciola field... Physicists of all stripes have reason to look CERN COURIER forward to Volume II with considerable enthusiasm.' CERN Physics Today on the hardback edition CH - 1211 GENEVA 23 Tel. (022) 83 41 03 0 19 504373 1,180 pp., illus., OUP USA, 1986, paperback Telex 236 98 £9.95 Oxford University Press

24 CERN Courier, December 1986