July 1989 European Physical Society

Postal Address: POB 69 Location: CH-1213 Petit-Lancy 2 27, Chemin de la Vendée Supplementary Secretariat: T. (22) 793 11 30 Petit-Lancy, Geneva P. O. Box 433 Tx. 428 024 eps ch Access: H-1371 Budapest Executive Secretary: Telefax: (22) 793 13 17 Chemin du Banc-Bénit T. (1) 35 83 86 G. Thomas

Past Presidents Executive Committee 1968-1970: 1980-1982: President: R.A. Ricci Members: G. Bernardini, Pisa A.R. Mackintosh, Laboratori Nazionali INFN Ph. Choquard 1970-1972: Copenhagen Via Romea 4 Institut de Physique Théorique E. Rudberg, Stockholm 1982-1984: I-35020 Legnaro (Padova) EPFL 1972-1976: J. Friedel, Orsay T. (49) 64 12 00 / 79 05 84 (direct) PHB - Ecublens H. B.G. Casimir, Eindhoven 1984-1986 Vice-President: E. Skrzypczak CH-1015 Lausanne 1976-1978: G.H. Stafford, Oxford Institute of Experimental Physics T. (21) 693 34 11 I. Ursu, Bucharest 1986-1988 University of Warsaw 1978-1980: W. Buckel, Karlsruhe O.G. Folberth A. Zichichi, Bologna 1988- Hoza 69 IBM Laboratories R.A. Ricci, Legnaro PL-00 681 Warsaw Schönaicher Strasse 220 T. (22) 28 30 31 ext. 269 D-7030 Böblingen Secretary: M. Jacob T. (7031) 16 41 00/01 Honorary Members CERN H.O.G. Alfven, Stockholm, Sweden F. Hund, Gottingen, FRG Theory Division D. Horn E. Arnaldi, Rome, N. Kurti, Oxford, UK CH-1211 Geneva 23 Dept, of Physics & Astronomy G. Bernardini, Pisa, Italy Sir Nevill Mott, Milton Keynes, UK T. (22) 767 24 14 Tel-Aviv University N.N. Bogolubov, Moscow, USSR L.E.F. Neel, Meudon, France Vice-Secretary: L. Cohen Ramat-Aviv H. B.G. Casimir, Heeze, The Netherlands G. Occhialini, Marcialla/Fi, Italy The Tel-Aviv 69978, Israel J. Friedel, Orsay, France V.F. Weisskopf, Cambridge, USA 47 Belgrave Square T. (3) 42 05 87/42 93 05 London SW1X 8QX, UK T. (1) 235 61 11 J.K. Pozhela Individual Ordinary Members President of the Lithuanian Treasurer: I. Slaus S.S.R. Academy of Sciences In July 1989 the number of Individual Ordinary Members on the books of the Society Ruder Boskovic Institute Lenino Prospektas 3 totalled 4021. The names of the nine delegates to Council who represent these mem­ POB 1016 USSR-Vilnius 232600 bers are given below. YU-41001 Zagreb T. 61 40 07 / 61 36 51 T. (41) 43 51 11 /42 56 52 I.O.M. Delegates to Council Vice-Treasurer: J.M. Gilles H. Ryde LASMOS, Physics Department University of Lund Delegates are elected by a ballot of all the Individual Ordinary Members for a term of Faculté Universitaire N.-D. de la Paix Department of Physics four years. The term is automatically extended if the delegate is elected to the Execu­ Rue de Bruxelles 61 Sölvegatan 14 tive Committee. B-5000 Namur S-223 62 Lund T. (81) 22 90 61 ext. 2897/2855 T. (46) 10 77 05/06 G. Chiarotti, Rome H. Ryde, Lund P. Choquard, Lausanne E. Skrzypczak, Warsaw J.T. Devreese, Antwerp D. Stacey, Oxford F. Netter, Paris W. Wenckebach, Leiden Council Meetings 1990: 29-30 March, Uppsala, Sweden Auditors: Delegates of Associate Members 1991: 21-22 March, Athens, Greece J. Schacher, Bern 1992: 26-27 March, Nice, France H. Smith, Kobenhavn A. Ascoli, CISE, Milan O. Meyer, KfK, Karlsruhe 1993: 25-26 March, Warsaw, Poland U. Enz, Philips, Eindhoven G. Winstel, Siemens, Munich 1994: 24-25 March, Berlin or Bad Honnef, FRG FIDES, Geneva

Ampere Group (180) 1 Eötvös Lorand Physical Society Del. G.J. Béné (628) 2 Pres. R. Blinc Member Organizations Dels. Gy. Csikai Slovenska Akademija I. Kovacs Znanosti In Umetnosti Pres. N. Kroo Novi Trg 3 (X) = No. of members in the Society (550) 1 Central Research Institute of Physics YU-61000 Lubljana or Group Del. H. Smith P.O. Box 49 H-1525 Budapest Sec-Gen. G.J. Béné Y = No. of delegates to Council Pres. B. Elbek Université de Genève, Section de Niels Bohr Institutet Sec-Gen. I. Kovacs Physique, quai Ernest-Ansermet 24 (480) 1 Tandem Accelerator Lab. Roland EötvÖs University CH-1211 Geneva 4 Del. J.M. Gilles DK-4000 Roskilde Institute for General Physics T. (22)21 93 55 Tx. 421 159 Pres. C.J. Joachain Sec. J. Schou FÖ u. 68, P.O. Box 323 Obervatoire Royal de Belgique Risø National Laboratory H-1445 Budapest 3, Avenue Circulaire T. (1) 18 79 27 B-1180 Bruxelles DK-4000 Roskilde Austrian Physical Society (779) 2 T. (2) 37 12 12 Fax (2) 37 35 16 Finnish Physical Society (788) 2 Dels. W. Breunlich Gen-Sec. V. Dehant Dels. J. Keinonen H. Latal Observatoire Royal de Belgique Dept, of Gen. Physics and Astro­ D.O. Riska Pres. H. Winter 3, Avenue Circulaire nomy, USSR Acad, of Sciences Pres. R. Nieminen Institut für Allgemeine Physik B-1180 Bruxelles (2000) 4 Helsinki University of Technology Technische Universität Wien T. (2) 375 24 84 Dels. A.F. Andreev Laboratory of Physics Wiedner Hauptstr. 8-10 Yu.A. Ossipyan Otakaari 1 Bulgarian Acad, of Sciences (105) 1 K. Pozhela SF-02150 Espoo A-1090 Wien Del. M. Mateev P.P. Pashinin Sec. W.H. Breunlich Pres. B. Sendov Pres. A.M. Prokhorov Sec. L. Kivipelto-Mattila Institut für Mittelenergiesphysik Sec-Gen. Iv.l liev Sec. B.A. Borisov Tampere University of Technology der Österr. Akad. der Wissenschaften Bulgarian Academy of Sciences USSR Academy of Sciences Dept, of Physics Boltzmanngasse 3 7 November Str. No. 1 Leninskyi Prospekt 14 P.O. Box 527 A-1090 Wien Sofia BG USSR-Moscow B-71 SF-33101 Tampere T. (222) 31 26 11 Fax (222) 31 87 23 T. (2) 88 07 93 Tx. 22 424 ban sf T. 237 21 41 Tx. 411 964 T. (31)16 24 52 Fax (31) 16 26 00 103 French Physical Society (2405) 4 Israel Physical Society (250) 1 Portuguese Physical Society (200) 1 Collaborating Societies Dels. M. Jacob Del. D. Horn Del. C.M. Ferreira A. Landesman Pres. Y. Yacoby Pres. H. Machado Jorge American Physical Society P. Lena Sec. Y. Balberg Director General for Quality Exec. Sec. W.W. Havens J. Winter Department of Physics Instituto Portugûes da Qualidade 335 East 45th St. Pres. P. Lena Hebrew University Rua Jose Estevao 83 A New York, N.Y. 10017 USA Observatoire de Paris Meudon Jerusalem 91904, Israel P-1199 Lisboa T. (212) 682 73 41 Bât. LAM T. (2) 58 56 80 Tx. 25 391 Gen-Sec. F. Duarte Santos F-92190 Meudon Sociedade Portuguesa de Fisica Sec-Gen. M. Veyssié The Netherlands' Physical Society Av. da Republica 37, 4o Canadian Association of Physicists Société Française de Physique (2653) 4 P-1000 Lisboa Exec. Sec. Mona L. Jento 33, rue Croulebarbe Dels. W.F. Druyvesteyn T. (1)77 32 51 151 Slater, Suite 805 F-75013 Paris A.M. Hoogenboom Ottawa, Ontario K1P 5H3 T. (1)47 07 32 98 C. van der Leun Romanian National Committee Canada P.H. van Vuren for Physics (300) 1 T. (613) 237 33 92 Pres. W.F. Druyvesteyn Del. A. Corciovei (14000) 5 Philips Nat. Lab., Gebouw WOp-53 Pres. I. Ursu Dels. K. Bethge Postbus 80.000 National Committee for Physics Physical Society of Japan I. Broser NL-5600 JA Eindhoven c/o National Council for Science Pres. Hiroshi Kamimura O.G. Folberth Sec. A.M. Hoogenboom and Technology Kikai Shinko Building W. von Oertzen Nederlandse Natuurkundige Vereniging 1, Piata Victories 3-5-8 Shiba-Koen R. Poerschke Julianalaan 74 R-71202 Bucharest Minato-ku Pres. O.G. Folberth NL-3722 GS Bilthoven Tokyo 105, Japan IBM Deutschland GmbH T. (30) 28 56 26 Sec. A. Corciovei Schönaicherstrasse 220 Central Institute of Physics D-7030 Böblingen Norwegian Physical Society (677) 2 POB MG 6 The Japan Society of Applied Bucharest R Gen-Sec. W. Heinicke Dels. E. Osnes Physics O. Havnes T. (0) 80 70 40 ext. 3115 Pres. Takuo Sugano Deutsche Physikalische Gesellschaft Tx. 11 397 csen r Hauptstrasse 5 Pres. E. Osnes Kunimatsu Building Department of Physics 1-2-6, Kudan-Kita D-5340 Bad Honnef Royal Irish Academy (60) 1 T. (2224) 7 10 61 University of Oslo Chiyoda-ku P.O. Box 1048, Blindern Del. D. Weaire Tokyo 102, Japan N-0316 Oslo 3 Pres. P.K. Carroll Hellenic Physical Society (55) 1 Sec. A. Thompson Sec. G. Jarrett Irish National Committee for Physics Del. G. Kouroupetroglou Institute for Energy Technology, POB 40 Royal Irish Academy Société Française des Spécialistes Pres. D. Marinos N-2007 Kjeller d'Astronomie (SFSA) Gen-Sec. G. Bouritsas 19 Dawson Street Pres. J. Delhaye Hellenic Physical Society T. (6) 80 60 75 Tx. 74 573 energ n Dublin 2, IRL Observatoire de Paris 6 Grivaion Street Fax (2) 81 09 20 T. (31) 76 25 70 61 Avenue de l'Observatoire GR-106 80 Athens Phys. Sect. Union of Czechoslovak Royal Spanish Society of Physics F-75014 Paris T. (1) 363 57 01 Fax (1) 361 06 90 Mathematicians and Physicists (300) 1 (1000) 3 Del. A. Fernandez-Ranada Icelandic Physical Society (70) 1 Dels. M. Cernohorsky Pres. A. Tiemblo Ramos Società Astronomica Italiana Del. J. Petursson J. Stanicek Gen-Sec. M.R. Heras Celemin Vice-Pres. M. Fulchignoni Pres. J. Yngvason J. Zofka Real Sociedad Española de Fisica 28 Via Brera Science Institute, University of Iceland Pres. S. Krupicka Facultades de Ciencias 1-20121 Milano Dunhaga 3 Sec. L. Pust Ciudad Universitaria IS-107 Reykjavik Institute of Physics E-28040 Madrid T. (1) 69 48 00 Czechoslovak Academy of Sciences T. (1) 243 38 79 Nederlandse Astronomenclub Na Slovance 2 Sec. T.A.Th. Spoelstra Sec. V.R. Eiriksson CS-180 40 Prague 8 Swedish Physical Society (1142) 3 Radiosterrenwacht Birkigrund 24 T. (2)815 26 17 Tx. 122 018 atom c Dels. A.M. Martensson-Pendrill Postbus 2 IS-200 Kopavogur Fax (2) 815 21 71 L. Nilsson NL-7990 AA Dwingeloo G. Tibell T. (5219)72 44 Tx. 42 043 SRZM NL The Institute of Physics (14000) 5 Physical Society of the German Pres. G. Tibell Dels. L. Cohen Democratic Republic (1260) 3 Dept, of Radiation Sciences C. Hilsum Dels. K.F. Alexander University of Uppsala Deutsche Gesellschaft für J.M. Irvine R. Keiper Box 535 angewandte Optik (DGaO) W. Pompe S-751 21 Uppsala W. Schmidt E. Jakeman Pres. J. Auth G.H. Stafford Sec. H. Calén Carl Zeiss Pres. C. Hilsum Sci-Sec. D. Hommel POB 1369 - 1380 Physikalische Gesellschaft der Dept, of Radiation Sciences D-7082 Oberkochen GEC Research Laboratories Deutschen Demokratischen Republik University of Uppsala Hirst Research Centre Am Kupfergraben 7 Box 535 East Lane DDR-1080 Berlin S-751 21 Uppsala Wembley HA9 7PP, UK T. (18) 18 38 46 Société Française d'Optique T. (2) 200 06 91 Sec. P. Chavel Exec-Sec. L. Cohen (1170) 3 B.P. 43 The Institute of Physics Physical Sect. Union of Yugoslav Dels. W. Kündig F-91406 Orsay Cedex 47 Belgrave Square Societies of Mathematicians, P. Martinoli T. (1) 69 41 68 44 London SW1X 8QX, UK Physicists and Astronomers (200) 1 J. Schacher T. (1)235 61 11 Tx. 918 453 Del. D. Bek-Uzarov Pres. W. Kündig Pres. D. Bek-Uzarov Sec. C. Amsler Société Suisse d'Optique et de Institute Ruder Boskovic (95) 1 Institute Boris Kidric Physikinstitut der Universität Zürich Microscopie Electronique (SSOME) Del. I. Slaus P.O. Box 522 Schönberggasse 9 Ch. E. Mathieu Dir.-Gen. K. Pisk YU-11001 Beograd CH-8001 Zürich Wild Heerbrugg AG Sec. I. Slaus Sec-Gen. L. Istrefi T. (1) 257 29 31/11 CH-9435 Heerbrugg Institute Ruder Boskovic Academy of Sciences and Arts Bijenicka c. 54 of Kosova Turkish Physical Society (302) 1 P.O. Box 1016 P.O. Box 194 Del. K. Gediz Akdeniz Koninklijk Instituut van Ingenieurs YU-41000 Zagreb YU-38001 Pristina Pres. K. Gediz Akdeniz Gen-Sec. D. van Moorsei T. (41)43 51 11 Fax (41) 42 54 97 T. (38) 4 29 29 Physics Department Royal Institution of Engineers Tx. 21 383 University of Istanbul Prinsessegracht 23 Polish Physical Society (1896) 3 34459 Vezneciler POB 30424 Dels. A. Oles Istanbul, TR NL-2500 GK 's-Gravenhage (1100) 3 S. G. Rohozinski Dels. A. Cingolani J.A. Zakrzewski Gen-Sec. E. Okan R.A. Ricci Pres. J.A. Zakrzewski Trakya University D. Sette Institute of Experimental Physics Fen-Edebiyat Fakultesi Sociedad Española de Optica Pres. R.A. Ricci Warsaw University Fizik Bölümü Pres. J. Barcala Laboratori Nazionali INFN Hoza 69 Rektörlük - Edirne, Turkey Serrano, 121 Via Romea 4 PL-00681 Warszawa T. (1811) 22 59 E-Madrid - 6 I-35020 Legnaro (Padova) Gen-Sec. S.G. Rohozinski Sec. E. Mazzi Polish Physical Society Società Italiana di Fisica Main Board The full and up-to-date address list of EPS Members has been printed in the Via L. degli Andalò 2 Hoza 69 DDR. Copies are being mailed direct to Members and should be received in I-40124 Bologna PL-00681 Warszawa the near future. T. (51) 33 15 54 T. (22)21 26 68 Tx. 815 548 104 Associate Members

ACEC - Ateliers de Constructions Electriques FIZ Energie, Physik, Mathematik GmbH, LNETI - Ministerio da Industria e Energia - de Charleroi, Charleroi, Belgium Eggenstein-Leopoldshafen, FRG Laboratorio Nacional de Engenharia e Tecnologia Industrial, Lisbon, Portugal L'Air Liquide, Jouy en Josas, France FOA - National Defence Research Institute, Stockholm, Sweden Max-Planck-Institut für Festkörperforschung, ASEA Brown Boveri, Heidelberg, Stuttgart, Fed. Rep. of Germany Fed. Rep. of Germany FOM - Foundation for Fundamental Research on Matter, Utrecht, NL Max-Planck-Institut für Plasmaphysik, Bell Telephone Manufacturing Company, Garching, Fed. Rep. of Germany Antwerp, Belgium Galileo Vacuum Tec SpA, Campi Bisenzio, Firenze, Italy NORDITA - Nordisk Institut for Teoretisk BESSY - Berliner Elektronenspeicherring Ges. General Electric Co. Hirst Research Centre, Atomfysik, Copenhagen, Denmark für Synchrotronstrahlung, Berlin West Wembley, United Kingdom North-Holland Publishing Co., British Telecom Research Laboratories, GSI - Gesellschaft für Schwerionenfor­ Amsterdam, the Netherlands Martlesham Heath, United Kingdom schung, Darmstadt, Fed. Rep. of Germany Paul Scherrer Institute, Villigen, Switzerland Bruker Analytische Messtechnik GmbH, Hahn-Meitner-Institut für Kernforschung, Rheinstetten, Fed. Rep. of Germany Berlin West Pechiney-Ugine-Kuhlmann, Paris, France CEA - Commissariat à l'Energie Atomique, Haldor Topsøe, Lingby, Denmark Compagnie Française Philips, Paris, France Dr. Wilhelm Heinrich Heraeus und Limeil-Brévannes, France Cerberus Ltd., Männedorf, Switzerland Else Heraeus-Stiftung, Hanau, N.V. Philips' Gloeilampenfabrieken, Fed. Rep. of Germany Eindhoven, the Netherlands CERN - European Organization for Nuclear Research, Geneva, Switzerland IBM Europe, Paris, France Physikalisch-Technische Bundesanstalt, CGE - Cie Générale d'Electricité, ILL - Institut Max von Laue-Paul Langevin, Braunschweig, Fed. Rep. of Germany Paris, France Grenoble, France Plessey Research (Caswell) Ltd., CNES - Centre National d'Etudes Spatiales, INFM - Consorzio Interuniversitario Nazionale Towcester, United Kingdom Paris, France per la Fisica della Materia, Genova, Italy Rhône-Poulenc, Courbevoie, France INFN - Istituto Nazionale di Fisica Nucleare, CNET - Centre National d'Etudes des Ris0 National Laboratory, Roskilde, Denmark Télécommunications, Lannion, France Rome, Italy CNR - Consiglio Nazionale delle Ricerche, Institute for Energy Technology, SABCA - Société Anonyme Belge de Cons­ Rome, Italy Kjeller, Norway truction Aéronautique, Brussels, Belgium Institute Josef Stefan, Ljubljana, Yugoslavia Cie. de Saint-Gobain, CNRS - Centre National de la Recherche Pont-à-Mousson, France Scientifique, Paris, France IOP Publishing Ltd., Bristol, United Kingdom Siemens AG, Berlin & Munich, FRG DESY - Deutsches Elektronen-Synchrotron, ISA RIBER, Rueil, France Hamburg, Fed. Rep. of Germany Springer-Verlag GmbH & Co. KG, DFVLR - Deutsche Forschungs- und JET Joint Undertaking, Abingdon, UK Heidelberg, Fed. Rep. of Germany Versuchsanstalt für Luft- und Joint Research Centre, Ispra (Varese), Italy Raumfahrt e.V., Köln, Fed. Rep. of Germany Standard Elektrik Lorenz AG, N.V. Kema, Arnhem, the Netherlands Stuttgart, Fed. Rep. of Germany DIGITAL Equipment Corp. Int. (Europe) Geneva, Switzerland Kernforschungszentrum Karlsruhe GmbH, Taylor & Francis Ltd., London, UK ECN - Netherlands Energy Research Karlsruhe, Fed. Rep. of Germany Thomson SA, Paris, France Foundation, Petten, the Netherlands KFA - Kernforschungsanlage Jülich, TNO - Netherlands' Organization for Applied ELSAG - Elettronica San Giorgio, Genoa, Italy Jülich, Fed. Rep. of Germany Scientific Research, The Hague, NL ENEA - Comitato Nazionale per la Ricerca e KFKI - Central Research Institute for Physics, UK Atomic Energy Authority, Sviluppo dell'Energia Nucleare e delle Budapest, Hungary London, United Kingdom Energie Alternative, Rome, Italy Leybold Heraeus GmbH, Hanau, Vacuumschmelze GmbH, Hanau, ESA - European Space Agency, Paris, France Fed. Rep. of Germany Fed. Rep. of Germany

EPS Action Committees (formerly Advisory Committees)

Applied Physios and Financial Resources Physics and Society Physios in Industry Committee Chair. E.W.A. Lingeman Chair. J.A. Goedkoop E.R. Pike Rooseveltlaan 139 De Rougemont-Nes 1 Kings' College London (KQC) NL-1079 AK Amsterdam NL-1862 AB Bergen N.H. Strand T. (20) 592 21 17 T. (2208) 1 34 50 London WC2R 2LS, UK T. (1) 836 54 54 Sec. T. Zemcik Institute of Physical Metallurgy Czechoslovak Academy of Sciences Zizkova 22 CS-616 62 Brno Tx. 62 345 ufmb e Physics Education Chair. C. Leubner Publications Conference Committee Institute for Theoretical Physics Committee University of Innsbruck Chair. K. Bethge Technikerstrasse 15 Chair. F. Mezei Institut für Kernphysik A-6020 Innsbruck Hahn-Meitner-Institut AG-C6 Universität Frankfurt T. (222) 748 51 66 Glienickerstrasse 100 August Euler Strasse 6 D-1000 Berlin 39 D-6000 Frankfurt am Main 90 Sec. M.G. Ebison T. (30) 80 09 23 22 T. (69) 798 42 42 Education Officer The Institute of Physics Sec. E.N. Shaw Vice-Chair. O.A. Tumanov 47 Belgrave Square EPS, POB 69 Institute of Spectroscopy London SW1X 8QX, UK CH-1213 Petit-Lancy 2 USSR - 142092 Troitsk (Moscow) T. (1) 235 61 11 T. (22) 793 11 30 105 EPS Divisions

Astronomy and Astrophysics Division (310) Condensed Matter Division (1428) Chair. M.C.E. Huber Solar Physics Section (121) Chair. F. Bassani Low Temperature Section (385) Space Science Department of ESA Scuola Normale Superiore ESTEC Chair. W. Mattig Piazza dei Cavalieri Chair. Y. Bruynseraede POB 299 Kiepenheuer Institut I-56100 Pisa Katholieke Universiteit Leuven NL-2200 AG Noordwijk Schoeneckstrasse 6 T. (50) 59 71 11 Tx. 590 548 snspi Lab. voor Vaste Stof Fysika T. (1719) 8 35 52 Fax (1719) 8 46 99 D-7800 Freiburg en Magnetisme T. (761)38 20 67 Vice-Chair. G. Benedek Celestijnenlaan 200 D Sec. G.F. Bignami Dipartimento di Fisica dell'Università B-3030 Leuven Istituto di Fisica Cosmica Sec. A.O. Benz Via Celoria 16 T. (16)20 10 15 Fax (16) 20 13 68 C.N.R. Institute of Astronomy i-20133 Milano 15/A Via Bassini ETH T (2) 239 24 09 Tx. 334 687 infnmi Committee Members: I-20133 Milano CH-8092 Zurich S.N. Erne, PTB, Berlin (West) T. (2) 26 65 237 T. (1) 256 42 23 J.R. Hook, University, Manchester Board Members: J.P. Laheurte, CNRS, Nice Board Members: R. Blinc, Univ. E. Kardelja, Ljubliana G.L. Romani, IESS-CNR, Rome Board Members: P. Ambroz, Astronomical Institute, A.S. Borovik - Romanov, B. Aschenbach, MPI f. Extra­ Ondrejov USSR Acad, of Sciences, Moscow terrestrische Physik, Garching F. Chiuderi-Drago, Astronom. Institute, * S. Bratos, P. et M. Curie Univ., Paris R.S. Booth, Space Observatory, Onsala Florence * Y. Bruynseraede, Catholic University, Macromolecular Physics Section V. Castellani, University, Rome F.L. Deubner, Astronom. Institute, Leuven (227) L. Koch-Miramond, CEN Saclay, Wurzburg L.J. Challis, University, Nottingham Gif-sur-Yvette G. Godoli, Astronomical Institute, J. Devreese, University of Antwerp, Chair. H.-G. Kilian J. Kota, Central Research Institute for Florence Wilrijk Abteilung f. Experimentelle Physik Physics, Budapest, D.O. Gough, Inst, of Astronomy, F. Flores, Autonoma University, Madrid Universität Ulm A.J. Kus, Copernicus Univ., Torun Cambridge G. Harbeke, RCA, Zurich D-79 Ulm, Oberer Eselsberg H. Ögelman, MPI f. Extraterrestrische P. Hoyng, Lab. for Space Science, W. Helfrich, Free University, Berlin T. (731) 176 22 65 Physik, Garching Utrecht H. Hochheimer, Max-Planck Institute, E.R. Priest, University, St. Andrews E.R. Priest, University, St Andrews Stuttgart Committee Members: J. Surdej, University, Liège A. Righini, Astronomical Institute, * H.G. Kilian, University, Ulm F.J. Baltà-Calleja, Inst, of Chemical H.J. Völk, MPI f. Kernphysik, Heidelberg Florence * M. Landolt, ETH, Zurich Physics, Madrid J. van Paradijs, Astronomical Institute, B. Schmieder, Observatory, Meudon * E. Lüscher, Technical University, D. C. Bassett, University, Reading Amsterdam G. Trottet, Observatory, Meudon Munich * U. Gedde, The Royal Institute of * G. Martinez, SNCI-CNRS, Grenoble Technology, Stockholm R.M. Pick, P. et M. Curie Univ., Paris * D. Geiss, DDR Acad, of Sciences, P. Siffert, CRN/PHASE, Strasbourg Teltow-Seehof Atomic and Molecular Physics Division (773) V. Smid, Czechoslovak Academy of P.J. Lemstra, Philips Res. Lab., Sciences, Prague Eindhoven Chair. M. Barat Molecular Physics Section (311) J.Bessa Sousa, University, Porto B. Lotz, CNRS, Strasbourg L.C.A.M., Bât. 351 M. Surma, A. Mickiewicz University, E. Martuscelli, CNR Polymer Materials, Université de Paris-Sud Chair. S. Leach Poznan Naples F-91405 Orsay Cedex Labor, de Photophysique Moléculaire * P. Wachter, ETH, Zurich * J. Spevacek, Czechoslovak Acad, of T (1)69 41 78 63 Fax (1) 64 46 19 92 Bâtiment 213, Université de Paris-Sud G. Winstel, Siemens AG, Munich Sciences, Prague F-91405 Orsay Cedex * Chairmen of Section Committees * co-opted members Sec. N.O. Andersen T. (1) 69 41 79 09 Physics Laboratory H.C. Orsted Institute Sec. S. Stolte Liquids Section (198) DK-2100 Copenhagen Fysisch Laboratorium Board Members: T. (31) 35 31 33/353 Katholieke Universiteit Chair. S. Bratos F. Barocchi, Dept, of Physics, Florence Fax (31) 35 06 28 Toernooiveld Université Pierre et Marie Curie D. Demus, Martin Luther University, NL-6525 ED Nijmegen Tour 16, 4 place Jussieu Halle Board Members: T. (80) 55 88 33 F-75252 Paris Cedex 05 Th. Dorfmüller, University, Bielefeld * M. Aymar, Univ. Paris-Sud, Orsay T. (1) 43 29 55 74 J.E. Enderby, University, Bristol K. Burnett, Clarendon Lab., Oxford Board Members: J. Janik, Inst, of Nuclear Physics, * J.P. Connerade, Imperiai College, V. Aquilanti, University, Perugia Sec. J-CI. Leicknam Krakow London S.D. Bosanac, Boris Kidric Institute, Université Pierre et Marie Curie P. Mazur, Lorentz Institute, Leiden * T. Dohnalik, Jagellonian Univ., Krakow Zagreb Tour 16, 4 place Jussieu G. Nicolis, Free University, Brussels H. Hotop, Univ., Kaiserslautern Ph. Brechignac, CNRS, Orsay F-75252 Paris Cedex 05 P. Pusey, RSRE, Malvern C.J. Joachain, University, Brussels P.K. Carroll, University, Dublin T. (1) 43 29 55 74 M.G. Velarde, UNED, Madrid * E. Källne, Royal Inst, of Techn., R.N. Dixon, University, Bristol Stockholm P. Erman, Royal Institute of Technology, S. Leach, Univ. Paris-Sud, Orsay Stockholm A. Macias, Univ. Autonoma, Madrid J.M. Flaud, University, Paris F.G. Meijer, University, Amsterdam C. Fotakis, University, Heraklion * S.D. Peyerimhoff, University, Bonn A. Gonzalez-Urena, University, Madrid A. Riera, Univ. Autonoma, Madrid Z. Herman, Academy of Sciences, Chemical Physics Section (291) Electronic and Atomic Collisions Z. Rudzikas, Acad, of Sciences, Vilnius Prague Section (265) A. Salin, Univ. Bordeaux, Talence W. Kolos, Academy of Sciences, Chair. A. Riera G. Stefani, IMA/CNR Rome, Monte­ Warsaw Dep. de Quimica, C-14 Chair. C.J. Joachain rotondo V.S. Letokhov, Academy of Sciences, Universidad Autonoma de Madrid Faculté des Sciences S. Stolte, University, Nijmegen Moscow Cantoblanco Université Libre de Bruxelles G. Werth, University, Mainz S. D. Peyerimhoff, University, Bonn E-28049 Madrid CP 227, Boulevard du Triomphe * A. Zecca, University, Trento M. Quack, ΕΤΗ, Zurich T. (1) 397 49 47/397 45 11 Tx. 27 810 B-1050 Bruxelles * coopted members P. Sarre, University, Nottingham T. (2) 640 00 15 H.C. Wolf, University, Stuttgart Sec. A. Macias Dep. de Quimica, C-14 Sec. G. Stefani Universidad Autonoma de Madrid Istituto di Metodologie Avanzate Atomic Spectroscopy Cantoblanco Inorganiche del CNR Section (EGAS) (263) Board Members: E-28049 Madrid Area della Ricerca di Roma, E. Biémont, University Liège, Ougrée T. (1)397 49 52 Fax (1) 397 41 87 CP 10 Chair. G. Werth R. Corbalan, Univ. Autonoma, I-00016 Monterotondo Institut für Physik Bellaterra-Barcelona T. (6) 90 02 02 49 Johannes Gutenberg Universität M. Crence, CNRS II, Orsay Board Members: Postfach 3980 S. Kegowski, N. Copernicus Univ., Torun E.A.G. Armour, University, Nottingham Board Members: D-6500 Mainz D. Lecler, University, Caen D. C. Clary, University, Cambridge J. Corner, University, Manchester T. (6131) 39 28 83 S. Leuchs, MPI für Quantenoptik, P. Froelich, University, Uppsala J.-P. Gauyacq, Univ. Paris-Sud, Orsay Garching E. Kochanki, University Louis Pasteur, M. Kurepa, Inst, of Physics, Belgrade Sec. F.G. Meijer G. O'Sullivan, University College, Dublin Strasbourg F. Linder, University, Kaiserslautern Zeeman Laboratorium W. Person, Institute of Technology, Lund E.A.C. Lucken, University, Geneva W. Lindinger, University, Innsbruck Universiteit van Amsterdam Z. Rudzikas, Academy of Sciences I. Nenner, LURE, University Paris Sud V. Martisovits, University, Bratislava Plantage Muidergracht 4 Lithuanian SSR, Vilnius J.P. Toennies, MPI for Fluid Mechanics, G. Nienhuis, RU, Utrecht NL-1018 VT Amsterdam R.C. Thompson, Imperial College, Gottingen K. Taulbjerg, University, Aarhus T. (20) 525 51 61 London A.J.C. Varandas, University, Coimbra L. Wolniewicz, University, Torun 106 Condensed Matter Cont. Optics Division (180) Board Members: J. Bescos, Instituto de Optica, Madrid Magnetism Section (442) Metals Section (549) Chair. H.A. Ferwerda K. Biedermann, Institute of Optical Department of Applied Physics Research, Stockholm Chair. P. Wachter Chair. E. Lüscher University of Groningen J.J.M. Braat, Philips Laboratories, Lab. für Festkörperphysik Physik-Department Nijenborgh 18 Eindhoven ETH-Zürich Technische Universität München NL-9747 AG Groningen J. Bulabois, University of CH-8093 Zurich D-8046 Garching T. (50) 63 49 03 Tx.53 410 rugro nl Franche-Comté, Besançon T. (1) 377 22 46 T. (89) 32 09 24 51 Fax (50) 63 48 79 J.C. Dainty, Imperial College, London R. Dändliker, University, Neuchâtel Committee Members: Committee Members: J.-P. Huignard, Thomson-CSF, Orsay J. Campbell, Solid State Phys. Lab., D. Bacon, University, Liverpool E.R. Pike, King's College, London Orsay F. Cyrot-Lackmann, CNRS, Grenoble Sec. J.J. Stamnes A. Podmaniczky, Technical University, J.A. Mydosh, Kamerlingh Onnes Lab., G. Martin, CENS-D, Gif-sur-Yvette Norwave Development AS Budapest Leiden M.S. Springfort, University, Bristol Forskningsvn. 1 V. Russo, IROE-CNR, Florence J. Kaczer, Czechoslovak Acad, of A. Zawadowski, Central Research N-0371 Oslo 3 O.D.D. Soares, University, Porto Sciences, Prague Institute, Budapest T. (2) 45 20 10 Tx. 71 536 T. Tschudi, Technische Hochschule, E. Karlsson, University, Uppsala Fax (2) 45 21 00 Darmstadt S. Methfessel, Ruhr Univ., Bochum Surfaces and Interfaces (572) Semiconductors and Insulators Chair. M. Landolt Quantum Electronics Division (327) (673) HPF-C2 ETH, Hönggerberg Chair. H. Walther * V.B. Chebotayev, Acad, of Sciences, Chair. G. Martinez CH-8093 Zurich Sektion Physik Novosibirsk SNCI-CNRS T. (1) 377 22 37 Universität München * A. Dönszelmann, Zeeman Laboratory, 25 Ave. des Martyrs Am Coulombwall 1 Amsterdam F-38042 Grenoble Cedex D-8046 Garching D.R. Hall, Heriot-Watt University, T. 76 88 10 01 Committee Members: T. (89) 32 09 41 42 / 32 90 57 04 Edinburgh V. Bortolani, University, Modena P. Knight, Imperial College, London Committee Members: B. Gumhalter, University, Zagreb * A. Piskarskas, University, Vilnius J. W. Allen, University, St. Andrews S. Holloway, University, Liverpool Sec. F.R. Aussenegg F. Pradere, Ecole Polytechnique, K.-F. Berggren, University, Linköping B. Kasemo, Chalmers Univ., Göteborg Inst. f. Experimental Physics Palaiseau P. Günter, ETH, Zurich G. Lelay, University, Marseille University of Graz F.K. Reinhart, EPFL, M. Schultz, Inst, for Applied Physics, F. Netzer, University, Innsbruck Universitätsplatz 5 PHB-Ecublens Lausanne Erlangen J. Pethica, University, Oxford A-8010 Graz * M. Rosenbluh, Bar-llan University, A. Stella, University, Pavia J.J. Pireaux, University, Namur T. (316) 380 51 86 Ramat-Gan B. Velicky, Czechoslovak Academy of K.H. Rieder, Freie Univ., Berlin * D. Schuöcker, Argelas, Vienna Sciences, Prague J.F. van der Ween, FOM, Amsterdam M.W. Sigrist, ETH, Zurich D.L. Weaire, University College, Dublin K. Wandelt, University, Bonn Board Members: S.T. Stenholm, University, Helsinki J.S. Bakos, Central Research Institute S. Svanberg, Institute of Technology, for Physics, Budapest Lund High Energy and Particle Physics Division (613) R. Bonifacio, University, Milan J.P. Woerdman, University, Leiden * V. Brückner, Friedrich-Schiller- Chair. W. Bartel Universität, Jena * Co-opted members DESY R. Cashmore, University, Oxford Notkestrasse 85 J.B. Dainton, University, Liverpool D-2000 Hamburg 52 J. Drees, University, Wuppertal T. (40) 89 98 25 72 R. Eichler, Paul Scherrer Institute, Interdi visional Groups Villigen Sec. R. Gastmans T. Ekelof, University, Uppsala and CERN Accelerators R. Cashmore, University, Oxford Inst, voor Theor. Fysica J. Fischer, CSAV, Prague Chair. G. Plass D. Degele, DESY, Hamburg Katholieke Universiteit L. Foá, INFN, Pisa LEP Division R. Eichler, PSI, Villigen Celestijnenlaan 200D J. lliopoulos, Ecole Normale, Paris CERN D. Gray, Rutherford-Appleton Lab., B-3030 Leuven R. Leiste, AdW der DDR, Zeuthen CH-1211 Geneva 23 Chilton T. (16) 20 10 15 G. Plass, CERN, Geneva T. (22) 767 29 20 W. Joho,PSI, Villigen R.A. Salmeron, Ecole Polytechnique, H. Klein, Institute for Applied Physics, Board Members: Palaiseau Sec. K. Hübner Frankfurt/M G. Alexander, Tel Aviv J.C. Sens, NIKHEF, Amsterdam LEP Division P. Mandrillon, CERN, Geneva G. Altarelli, University La Sapienza, R. Sosnowski, Inst, for Nuclear CERN M. Olivier. CEN-Saclay, Gif-sur-Yvette Rome Research, Warsaw CH-1211 Geneva 23 A. Renieri, ENEA, Frascati H. Bøggild, Niels Bohr Institute, F.J. Yndurain, Autónoma University, T. (22) 767 59 61 S. Rosander, Royal Inst, of Technology, Copenhagen Madrid Stockholm Board Members: W. Schnell, CERN, Geneva E. Acerbi, University, Milan S. Tazzari, INFN, Frascati D. Böhne, GSI, Darmstadt G. Thompson, Daresbury Lab., Nuclear Physics Division (562) T. Bressani, University, Turin Warrington Chair. G. Goldring Board Members: Weizmann Institute R. Bergere, CEA, Saclay Computational Physics (441) Rehovot 76100, Israel A. Bertin, University, Bologna T. (8) 48 25 28 P. Glaudemans, University, Utrecht Chair. P. Pyykkö Board Members: G. Morrison, University, Birmingham Department of Chemistry K. Decker, University, Bern Yu. Oganessian, JINR, Dubna University of Helsinki R.A. de Groot, Fac. of Science, ESM, L. Schaller, University, Fribourg Et. Hesperiankatu 4 Nijmegen Sec. R.M. Bock B. Schröder, University, Lund SF-00100 Helsinki L. Hedin, Dept, of Theor. Physics, Univ., GSI - Ges. für Schwerionenforschung D. Schwalm, University, Heidelberg T. (0) 402 74 55/56 Lund Postfach 11 05 52 Z. Szymanski, University, Warsaw W. Lauterborn, Tech. Hochschule, D-6100 Darmstadt I. Uhlela, Charles University, Prague Sec. J. Nadrchal Darmstadt T. (6151) 35 97 60 J. Vervier, University, Louvain-la-Neuve Fysicani ustav CSAV J. Nührenberg, MPI für Plasmaphysik, Na Slovance 2 Garching CS-180 40 Praha 8 Liben J. Petersen, IBM, Bergen T. (2) 35 55 00/35 42 41 K. Pisk, Ruder Boskovic Institute, Plasma Physics Division (372) Zagreb Chair. K. Appert M. Kaufmann, MPI for Plasma Physics, A. Tenner, NIKHEF-H, Amsterdam Centre de Recherches en Physique Garching History of Physics des Plasmas G. M. McCracken, Culham Laboratory, 21, ave. des Bains Abingdon Chair. F. Bevilacqua CH-1007 Lausanne J.T. Mendonça, JET, Abingdon Dip. di Fisica "A. Volta" T. (21) 693 34 53 D.D. Ryutov, Nuclear Physics Institute, Università di Pavia Members: Novosibirsk Via A. Bassi, 6 J. Depireux, University of Liège, H. Schlüter, Ruhr University, Bochum I-27100 Pavia Sart-Tilman Board Members: S. Segre, University of Rome II, Rome M. Ebison, The Institute of Physics, F. Engelmann, NET-IPP, Garching F.W. Sluijter, Technische Hogeschool, Sec. Ch. Blondel London E. Fabre, Ecole Polytechnique, Palaiseau Eindhoven Centre de Recherche en L. Navarro, University of Barcelona, H. Gündel, Central Inst, for Electron J. Tachon, CEN Cadarache, Histoire des Sciences Barcelona Physics, Berlin St-Paul-lez-Durance Cité des Sciences et de l'Industrie A. Ott, University of Göteborg, Molndal V. Jensen, Risø National Laboratory, R.R. Weynants, Royal Military School, F-75930 Paris Cedex 19 J. Teichmann, Deutsches Museum, Roskilde Brussels T. (1) 40 05 70 00 Munich 107 Experimental Physics EPS Publications Control Systems (55) Chair. A. Daneels Europhysics Letters Europhysics Conference Abstracts PS Division CERN Editorial Board Series Editor: K. Bethge, Frankfurt/Main CH-1211 Geneva 23 Managing Editor: G. Thomas, EPS Secretariat T. (22) 767 25 81 / 767 25 35 Editor-in-Chief W. Buckel, Karlsruhe Series 13, 1989, Volumes A-G Treas. K. Muller 13A 9th EPS General Conference of the Condensed Matter Division KFA Jülich Co-Editors: Nice, 6-9 March Postfach 1913 R. Balian, CEN-Saclay, Gif-sur-Yvette 13B 16th European Conference on Controlled Fusion and Plasma Physics D-5170 Jülich G. Barbiellini, CERN, Geneva Venezia, 13-17 March T. (2461) 61 65 21 K.J. Barnes, University, Southampton 13C Third European Conference on Atomic and Molecular Physics: ECAMP-3 W. Bartel, DESY, Hamburg Bordeaux, 3-7 April Board Members: F. Bassani, Scuola Normale Superiore, T. Blumer, Paul Scherrer Institute, Pisa 13D 2nd European Conference on Quantum Electronics/EQEC 2 Villigen L.P. Gorkov, Landau Theoretical Dresden, 28 August - 1 September W. Busse, Hahn-Meitner-Institute, Institute, Moscow 13 E 21st Europhysics Conference on Macromolecular Physics Berlin West H. Grimmeiss, University, Lund Electrical and Optical Active Polymers PN. Clout, Los Alamos Nat. Lab., V. Heine, University, Cambridge Lodz, 4-8 September Los Alamos, USA Ch. Janot, ILL, Grenoble 13F 22nd Europhysics Conference on Macromolecular Physics B. Kuiper, CERN, Geneva C.J. Joachain, Free University, Brussels Structure Formation in Polymer Solutions E.C. Owen, Daresbury Lab., Warrington M. Kaufmann, MPI for Plasma Physics, Leuven, 25-27 September Garching Contact Persons: P. Kienle, GSI, Darmstadt 13G 5th EPS Liquid State Conference on Turbulence M. AI-Bakir, IRAQI-AEC, Baghdad, Iraq F. Laloë, Ecole Normale Supérieure, Paris Moscow, 17-21 October D. Barton, Brookhaven National Lab., P. Manneville, CEN Saclay, Gif-sur-Yvette Long Island, USA E. Schatzmann, Observatory, Meudon No Abstracts Booklet H. van der Beken, JET, Abingdon A. Truman, University, Swansea International Congress on Optical Science and Engineering V. D. Bogert, FERMI National Laboratory, Paris, 24-28 April Batavia, USA International Europhysics Conference on High Energy Physics J.F. Gournay, DPH.N/AL CEN Saclay, Madrid, 6-13 September Gif-sur-Yvette Europhysics News Europhysics School on Man-Machine Communication in the Scientific Environment D. Gurd, TRIUMF, University of British Skalsky dvur, 19-28 September Columbia, Vancouver, Canada Editorial Board U. Hacker, KFA, Jülich J.L. Hamei, Saturne Lab., Saclay, Chair. J. Muller, University, Geneva Gif-sur-Yvette P.G. Innocenti, CERN, Geneva Members: T. Kimura, Japan Atomic Energy A.-J. Dianoux, Max Von Laue-Paul Research Institute, Ibaraki-ken, Japan Langevin Institute, Grenoble W. D. Klotz, ESRF, Grenoble F. James, CERN, Geneva S.-I. Kurokawa, National Laboratory for M. Mayor, Geneva Observatory, High Energy Physics, Ibaraki, Japan Versoix J. Lister, CRPP/EPFL, Lausanne J.M. Richard, University, Grenoble S. Liu, IHEP, Beijing E.N. Shaw, EPS Secretariat, Geneva T. T. Luong, GANIL, Caen M. Siegrist, Plasma Physics Research J.R. Lutz, CRN, Strasbourg Centre, Lausanne Journals Recognized by EPS R.P. Mannix, Rutherford Appleton Lab., Chilton Acta Physica Polonica A Panstwowe Wydawnictwo Naukowe M. Mignacco, Sincrotrone, Trieste Acta Physica Polonica B Panstwowe Wydawnictwo Naukowe Y. Navratil, Czechoslovak Technical Acustica S. Hirzel Verlag University, Prague Advances in Physics Taylor and Francis M. Rabany, CERN, Geneva Astronomy and Astrophysics Springer Verlag M. Ross, SLAC, Stanford, USA R. Steiner, GSI, Darmstadt Correspondents are being no­ Astronomy and Astrophys. Supplement Editions de Physique L. Trasatti, LNF, Frascati minated from the national so­ Bulgarian Journal of Physics Bulgarian Academy of Sciences cieties as well as from the Classical and Quantum Gravity IOP Publishing Ltd. Working Group Chairmen: Divisions and Groups. The list Computer Physics Communications North-Holland G. Baribaud, CERN, Geneva is, at present, only partially complete. Czechoslovak Journal of Physics Academia, CSAV G.P. Benincasa, CERN, Geneva Int. Reviews in Physical Chemistry Taylor and Francis Inverse Problems IOP Publishing Ltd. Isotopenpraxis Akademie-Verlag Berlin Journal de Physique Editions de Physique J. of Magnetism and Mag. Materials North-Holland Physics for European Journal Journal of Modern Optics Taylor and Francis Development (98) of Physics Journal of Physics A IOP Publishing Ltd. Journal of Physics B IOP Publishing Ltd. Chair. E. Lillethun Editorial Board Journal of Physics Condensed Matter IOP Publishing Ltd. Department of Physics Journal of Physics D IOP Publishing Ltd. University of Bergen Editor: J. Pisut, Comenius University, Allegaten 55 Bratislava Journal of Physics G IOP Publishing Ltd. N-5007 Bergen Liquid Crystals Taylor and Francis T. (5) 21 27 57 Members: Molecular Physics Taylor and Francis K.F. Alexander, Central Inst, for Electron II Nuovo Cimento A Editrice Compositori Sec. J.B. Robert Physics, Berlin Editrice Compositori Service National des Champs Intenses, H. Beck, University, Neuchâtel II Nuovo Cimento D CNRS J. Black, King's College, London Philosophical Magazine A Taylor and Francis B. P. 166X R. Deltour, Free University, Brussels Philosophical Magazine B Taylor and Francis F-38042 Grenoble Cedex W. Gough, University College, Cardiff Philosophical Magazine Letters Taylor and Francis T. 76 88 10 01 O. Grön, University I, Oslo Physica A North-Holland C. Isenberg, University of Kent, D.F. Brewer, University of Sussex, Canterbury Physica B + C North-Holland Brighton P. Kennedy, University, Edinburgh Physica Scripta Royal Swedish Academy J. Cermak, Czechoslovak Techn. Univ., H. Latal, Karl-Franzens-University, Graz * Plasma Physics and Controlled Fusion IOP Publishing Ltd. and Prague C. Leubner, University, Innsbruck Pergamon Press D. Feil, Twente University of Technology, S. Lundqvist, University, Göteborg Reports on Progress in Physics IOP Publishing Ltd. Enschede M.B. Palma-Vittorelli, University, Revue de Physique Appliquée Editions de Physique G. Furlan, University, Trieste Palermo L. Hasselgren, ISP, Uppsala W.A. Phillips, University, Cambridge Semiconductor Science and Technology * Publishing Ltd. S.W. Raither, UNESCO, Paris D.J. Raine, University, Leicester Zeitschrift für Physik A Springer Verlag H. van Regemorter, Observatory, A.F. Ranada, University, Madrid Zeitschrift für Physik B Springer Verlag Meudon M.F. Thomaz, National Inst, for Zeitschrift für Physik C Springer Verlag J.B. Sousa, University, Porto Scientific Research, Lisbon Zeitschrift für Physik D Springer Verlag M.J. Steyaert, University, Louvain J.P. Woodcock, Univ. Hosp. of Wales, M. Tomak, METU, Ankara Cardiff * Special Recognition at request of Plasma Physics Division 108