CERft COURIER INTERNATIONAL JOURNAL OF HIGH ENERGY PHYSICS VOLUME 35 The DRYTEL Series Oil free pumping systems from atmosphere to 109 mbar The Drytel Series provides a clean vacuum down to 10 6or 10 9 mbar range. Completely self contained, single switch operation, the Drytel Series provides dry, compact systems for use anywhere clean vacuum is required. Available in bench top, compact Micro versions or customer specified configurations to better fit applications like calibration benches, surface analysis, mass spectrometry, electron microscopy, and any process that call for clean evacuation. Ceramic bearings are used in all Alcatel molecular pumps. • Alcatel CIT Vacuum Technology Division - 98, avenue de Brogny - BP 2069 - 74009 ANNECY - FRANCE Tel: (33) 50 65 77 77 - Fax: (33) 50 65 77 89 USA United Kingdom Germany Italy Japan Alcatel Vacuum Products Alcatel Vacuum Technology UK Ltd Alcatel Hochvakuumtechnik GmbH Alcatel Vacuum Systems SpA Alcatel ITS Tel : (1)617 331 4200 Tel : (44)494 44 84 44 Tel : (49) 9342 96 100 Tel : (39)2 33 00 80 13 Tel : (81) 354 24 14 14 ISSN 0304-288X Advertising enquiries Europe Volume 35 No. 1 Micheline Falciola January/February Covering current developments in high energy Advertising Manager 1 CERN 995 physics and related fields worldwide CH-1211 Geneva 23, Switzerland Editor: Gordon Fraser (COURIER @ CERNVM)* Tel.: +41 (22) 767 4103 Production and Advertisements: Fax: +41 (22) 782 1906 Micheline Falciola (FAL @ CERNVM)* Advisory Board: E.J.N. Wilson (Chairman), E. Lillestol, Rest of the world H. Satz, D. Treille; with L. Foa, Laurie Daddona E.M. Rimmer Advertising Manager, USA *(Full electronic mail address... @ CERNVM. CERN. CH) Gordon and Breach Publishers 820 Town Center Drive LANGHORNE PA 19047 Tel.: (215) 750-2642 The ultimate birthday present Fax: (215) 750-6343 Approval for CERN's LHC machine Distributed to Member State governments, institutes and laboratories affilliated with CERN, and to their personnel. Around the Laboratories General distribution CERN: Another leap at LEP Improved electron-positron performance Jacques Dallemagne CERN, 1211 Geneva 23, Switzerland DESY: Luminous 1994 In certain countries, to request copies or to 8 Improved electron-proton performance make address changes contact : DARMSTADT: Heaviest of them ail China 8 Elements 110 and 111 synthesized Dr. Qian Ke-Qin Institute of High Energy Physics BEIJING: Green light for feasibility studies on tau-charm factory P.O. Box 918, Beijing, 10 Looking at new Chinese machine People's Republic of China TRIUMF: Technology transfer Germany 11 Canadian industrial spinoff Monika Stuckenberg or Kerstin Techritz DESY, Notkestr. 85, 22603 Hamburg 52 INDIA: Photon multiplicity detector 14 Module for heavy ion physics Italy Mrs. Pieri or Mrs. Montanari ] 5 COMPUTER OPERATING SYSTEMS: HEPiX news INFN, Casella Postale 56 00044 Frascati, Roma Physics monitor United Kingdom *| Q Muon colliders Su Lockley Rutherford Appleton Laboratory, *| Q Cosmic rays of the highest energies Chilton, Didcot, Oxfordshire 0X11 0QX USA/Canada "I Q Antiprotonic heating of nuclei Cyndi Rathbun 20 DESY: Theory workshop looks at supersymmetry (cyndi [email protected]) Fermilab, P.O. Box 500, Batavia Illinois 60510 24 Books received CERN COURIER is published monthly except January and August in English and, 23 People and things French editions. The views expressed in the Journal are not necessarily those of the CERN management. Printed by: Drukkerij Lannoo nv 8700 Tielt, Belgium Published by: European Laboratory for Particle Physics CERN, 1211 Geneva 23, Switzerland tel.: +41 (22)767 61 11, telex: 419 000 CERN CH, telefax: +41 (22) 767 65 55 CERN COURIER only: Cover photograph: How the world's highest energies look. At the end of 1994, tel. +41 (22) 767 41 03, CERN supplied lead nuclei, accelerated to about 160 GeVper nucléon, represent­ ing over 30 TeV of beam energy for each nucleus, to a range of experiments. telefax+41 (22) 782 19 06 This shows what happens when lead meets lead in the Time Projection Chamber USA: Controlled Circulation of the NA49 experiment. With the quest to recreate the quark-gluon plasma which permeated the early hot Universe, definitive results from all these experiments are Second class postage paid at Batavia, Illinois eagerly awaited. CERN Courier, January/February 1995 III LASERS & LIGHT SOURCES H2 and Dye Lasers High Intensity Sources At 2-3 MW peak power output, this is probably Utilising a full range of Xenon, Mercury and Hg/Xe the most powerful N2 laser of its type. Arc lamps, they employ special ellipsoidal reflectors Yet there's no tweaking or adjustment necessary: which guarantee the highest efficiency of collection to operate just set the gas pressure and press and transfer of light in the visible and UV region. ignition - it's that simple! ^ Powerful enough to pump different dye lasers At least 6 times the intensity of conventional * simultaneously or even a dye laser & light sources . unrivalled in intensity for a frequency doubler. given lamp power. Tunable range from 360nm to 990nm and Available as compact sealed units and can be frequency doubler to access UV range from easily connected to monochromators, optical 235nm to 345nm. fibres and other systems. For brochures contact: WSEZÊ Photon Technology International Suite 3 The Sanctuary Oakhill Grove Surbiton Surrey KT6 6DU England Tel: +44 (0) 181 390 6676 Fax: +44 (0) 181 390 6610 eV PRODUCTS Hybrid Electronics Low NOISE, HIGH PERFORMANCE eV PRODUCTS is emerging as a leader in ultra low-noise hybrid electronics. Our family of products has been quietly growing in quality and quantity to satisfy a wide range of commercial and laboratory applications. Call or Fax us today for details and specifications. PRODUCTS - Single Channel Preamplifier Hybrid • Triple Channel Preamplifier Hybrid • Low-noise Single/Triple Channel Laboratory Preamplifier • Shaping Amplifier (0.2 - 5.0 |is) Source High Count Rate High Resolution • Integrated Shaper/Discriminator PCB Capacitance eV-5091 eV-5093 Risetime = 20 ns Risetime = 60 ns FEATURES Falltime = 25 us Falltime = 600 us 0 to 100 pF Sensitivity = 0.45 mv/fc Sensitivity = 2.2 mv/fc • Ultra Low-noise (90 e" rms{Si}) Noise = 270 e rms (Si) Noise = 120 e rms (Si) Cf = 4.7 pF, Cf = 0.47 pF, • High Count Rate and/or High Resolution Rf = 10 MQ Rf=1.0GQ eV-5092 eV-5094 • High Performance/Cost Ratio Risetime = 12 ns Risetime = 45 ns • "Plug-in" Versatility Falltime = 85 us Falltime = 1200 us 100 to 1000 pF Sensitivity = 0.12 mv/fc Sensitivity = 0.9 mv/fc • Custom Hybrid Design Capability Noise = 290 e rms (Si) Noise = 220 e rms (Si) Cf = 4.7 pF Cf = 1.0 pF Rf = 10MQ Rf =500 MQ TEL-1-(412) 352-5288 FAX-1-(412) 352-4980 Single Channel Preamplifier Hybrid Circuit Selection Chart 375 Saxonburg Blvd., Saxonburg, PA 16056 USA IV CERN Courier, January/February 1995 iliiiiiilil 11 aining and installation services will be available in the CES tradition as for the FIC 8234 systems. First systems will be available in the second quarter 95 (April-May). Because of the interest already expressed, reserve quickly for early delivery ! Complete turn-key systems consist of: • RTPC 8067 equipped with: - 66 MHz Power-PC 603 or 100 MHz Power-PC 604. - 32 Mbytes RAM, 1 Mbyte FEPROM, Ethernet, SCSI II, PCI Mezzanine slot for ATM, FDDI, fibre channel, custom designed PMC cards, etc... - Sparse Data Scan Processor - VME D64 Block Mover and optional VSB • DSK 8133 340 Mbytes or 1 Gbyte disk • Lynx 2.2 development system with C compiler, TCP-IP, NFS • Complete System Support Package for Physics with: - VIC support (VIC 8250 and VIC 8251) - FDL support (FDL 8050) - CAMAC support (CBD 8210 and VCC 2117) - FASTBUS support (FVSBI9210 and VFI9214). • Uses the existing CAMAC unchanged & preserves the VAX VMS The System Crate Replacement consists of a VME minicrate linked to the Code host via an Ethernet TCP/IP connection and to the CAMAC CCA2s of the • Complete black box system with all the required hardware and front-end crates via a VME CAMAC Branch Driver. software module • Number of CAMAC branches can be increased to a maximum of 4 If your host per Block Box by plug-in hardware and software system has • Unlimited number of SCR 5310 driven by the same host via a network network connection connectivity, • Distance between SCR and hosts is effectively unlimited you already • Possibility to add further hosts, to produce a full multi-host system. have inter­ • Installation and training service face to the • Multiple Host environments (DEC, HP, SUN,...) SCR. • Software Transition Module exists for different hosts: VAX / VMS, UNIX-based systems and OS-9 based systems The SCR has been designed as a completely transparent System Crate VME Black Box VME Minicrate Upgrade for experiments still using the System Crate approach, when a 68040 Processor Stand-alone TCP/IP complete front-end redesign is too expensive or when the existing Data Real-Time OS CAMAC Branch Driver Acquisition Software cannot be modified. It has the advantage that the existing FORTRAN code needs not be changed. The SCR's Software Transition Module adapts the ESONE Software Transition Module calls to the new hardware which slides in as a replacement of the Root Crate. CES, at the leading edge in system conception For any additional information about this product or our complete VIC, VME, CAMAC and FASTBUS line, do not hesitate to contact us. T3. VERSATILE LES FOR ME users have waited years for sophisticated, multi-input data acquisition modules. 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