vm •S^?i V3 MMS& %:-•> '$K*Sf rX*T>A '£*? m// ^^^BîHï //.-/w ^' y///. '"—'/^v/Ay//^ v/ 7/'//;y// //y Applications for the use of the ILL facilities All research proposals have to be submitted to the Scientific Commercially exploitable results Council for approval. The Council meets twice each year and the closing dates for the acceptance of applications are: Visitors and ILL scientists may occasionally be involved in ex­ February 15 and August 31. periments which have possible commercial applications. If any The completed research proposal forms should be sent to: scientist considers that this is the case, he should get in touch The Scientific Coordination & Public Relations Of­ with the Scientific Secretary. fice (SCAPRO) Institut Max von Laue — Paul Langevin Other publications available 156 X Neutron Research Facilities at the ILL High Flux Reactor, Edi­ 38042 Grenoble Cedex tion 1983. France Information and Regulations for Reactor Users, Long-Term Tel. (76) 48.72.44 B. Maier Visitors and New Scientific Staff, Edition March 1984 48.71.79 G. Briggs both available from SCAPRO 48.70.41 K. Mayer-Jenkins (Secretary) Experimental Reports and Theory College Activities 1983 48.70.82 A. Taffut (Secretary) available from the ILL Library. Telex: 320621 F (Appropriate application forms may be obtained on request from the above office). Under normal circumstances the ILL makes no charge for the use of its facilities. However, special equipment (other than the existing instruments, counters, standard cryostats and shielding requirements) must be provided by the user. This ap­ plies particularly to the experimental samples which must, in all cases, be provided by the user. Chemistry and Biology laboratory facilities are available for any necessary sample preparation. The ILL makes a limited contribution towards the travel and subsistence expenses for experimentalists coming from approv­ ed laboratories in the three member countries. (Details on request). Front Cover Correlation matrix for time-of-fligtat (y-axis) versus kinetic energy (x-axis) of fission fragments from thermal neutron induced fission of 235-Uranium. For a given fragment mass there is a one-to-one correlation between the time it tr»kes a fragment to travel along a fixed flight-path and its kinetic energy. In­ dividual fission fragment masses should appear in the figure as diagonal lines running from the top left Oong time-of-flight or equivalent low velocity and tow kinetic energy) to the boUom right (short time-of-flight and high energy) with the mass number increasing from bottom left to top right. Indeed, the data gather around those lines which shows that individual masses have been resolved. 2 Contents THE IHSTITVT LAK-UUKEVM p. 5 ORGANISATION OF THE ILL p. 6 Reactor Operation VISITS AND EVENTS IN I9K p. 8 Department DIRECTOR'S REPORT p. 10 SaReactor operation 1963 p. 117 Operation of the sub-assemblies p. 117 Relations with ihe Safely Authorities p. 118 Colleges Computing College 2: Theory p. 20 uCollege 3: Fundamenta l and nuclear physics p. 22 Department College 4: Structural and magnetic excitations Review: Neutron Investigation Automation and Data Service (SAD) p. 124 of modulated structures p. 32 Central Computer Service p. 126 Collège 5: Crystal and magnetic structures p. 47 College 6: Liquids, disorders and defects in materials p. 57 College 8 and EMBL Grenoble: Biochemistry p. 62 College 9: Chemistry p. 68 Other Sections làSafety and Healt h Physics Group p. 130 Instrument Library p. 131 Operation Department Secretariat of Physicists p. 131 New Instruments / Modifications p. 75 uCentral Group p. 76 Sample environment group p. 77 Special cryogenics p. 78 Fundamental and nuclear physics p. SO Administration TOree-exis spectrometers p. 85 Tnw-of-Fligtit, high resolution Department and diffuse scattering p. 88 Diffraction Instruments p. 93 Personnel p. 135 Welfare p. 137 Finance p. 139 Scientific Coordination and Public Relations Office Experimental activities In 1963 p. 100 Miscellaneous Workshops and Conferences p. 103 u Experiments carried out at the ILL p. 146 Public Relations p. 103 Workshops, Theses p. 156 Internal Reports & Publications p. 157 Author Index for Publications p. 180 Publications "In Press" p. 188 Technical Department MInstruments an d Metltods p. 107 General Services p. 112 HF3B I *«**«&*'->-> 'k<> •• i i > i ^ v The Institut Nax von Laue - Paul he Institut Max von Laue-Langevin (ILL) at Grenoble was formally founded in January 1967, with the signature of an intergovernmental convention between France and the Federal Republic of Germany. The aim was to provide the scientific community of the affiliated countrieT s with a unique neutron beam facility applicable in fields such as the physics of condensed matter, chemistry, biology, nuclear physics and materials science. The construction of the Institut and its high flux reactor was undertaken as a joint French-German project, with a total capital investment of 335 million FF. The reactor went critical in August 1971 and reached its full power of 57 MW for the first time in December 1971. The year 1972 saw the start-up of the cold and hot sources, the first instruments and the beginning of the experimental programme. On January 1, 1973 the United Kingdom joined the Institut as a third equal partner, contributing its share to the total capital investment. The corresponding intergovernmental convention was formally signed in July 1974 by the pertinent ministers from the three affiliated countries. On December 9, 1981 a protocol was signed by representatives from the three member countries which extended the life of the ILL until December 31, 1992. The ILL is a non-trading company under French civil law. The three countries are represented by the following Associates: — Kernforschungszentrum Karlsruhe GmbH, Germany — Centre National de la Recherche Scientifique, France — Commissariat à l'Energie Atomique, France — Science and Engineering Research Council, United Kingdom. These Associates are represented on a Steering Committee, which establishes the general rules of the management of the ILL. The Institut is headed by a Director and two Assistant Directors, all with a five year tenure, the former to be nominated alternately by the German and the British Associates, the other two by the remaining Associates. A Scientific Council, nominated by the Associates, advises the Directors on the scientific programme and on practical aspects relating to its operation. The scientific users' community of the ILL is represented in 8 subcommittees of the Scientific Council, which meet twice a year to select those research proposals which are to be carried out at the neutron beam facilities of the ILL. A further Subcommittee of the Scientific Council deals with questions of instrumentation, serving as a discussion platform between the ILL and its external users. The purpose of the ILL thus differs from other research institutes in so far as it is a central facility created so that chemistry, solid state physics, fundamental and nuclear physics, biology and metallurgy specialists from laboratories in the partner countries can use the unique power of neutron techniques to broaden the attack on their problems. Designing and operating instruments and helping the visiting users to carry out their experiments is thus the principal task of the Institut's own scientists. The experimental use of the instruments by ILL staff is subject to the same approval system as their use by external teams. M A turd's eye I'd'»- of the ILL and its surroundings. External Organisation of the Institut Laue-Langevin 1981 Jtntrtiter tf tttt •—«<««* Science and Engineering Commissariat à l'Energie Kernforschungszentrum Research Coundl (SERC) Atomique (CEA) Karlsruhe (KFK) Centre National de la Recherche Scientifique (CNRS) Steering CwMtttce (at Hi l«< KMtini) Atkinson (SERC) Cribier (CEA) Blaesing (BMFT) Hobbis (SERC) Horowitz (CEA) Hofbauer (BMF) Leadbetter (SERC) Lehmann (chairman) (CNRS) Klose (KFK) Oltewill (Univ. of Bristol) Mîquel (CNRS) Simon (Max-Flanck-Ges). HHWi VVHM^H99^^HB Pettet Poldenuo Bfader Mfllfrgton Bariae ; Rktt SdetitiflcCounci (i«ltiiasi«M«ini) TITI—ittm tf «he SdwrtWc twrt PimHimmlil and Structural Crystal and liquids, Blocbetniscry Chemistry Instruments Nuclear Physics and Magnetic Magnetic Structura Disorders and Large Surfaces & Excitations Defects In Molecules Spectroscopy Materials Lys. Cowley Ctiear Brooflar Dapsy Bkàndcfl Cbarvoun Clou** niMw Scat* Bdwani. Day ChMtaai Dw/aad Cbabre Cotton Couard Mteaeekcr Stgaarblsui Hantc Ffccoer TTasasliy FUBÊT Hoftaaaa EMsardt Penr Stack* Horner GoodsMaak GK«> Hktasel OkVje Kjjau PHUIIHIII Pitas Ï«K rsgaamwiez Ftaatar Msnrio Scafltag Jaraa OauM ffiasraV •Won/ ViahMau T—l« Pial PotftJK Seha/UU Miner Richards Lassegues auatoaprez UUocd SooWe Ska Sis wait Nlerhaot Weill Tbocnai Schwartz Kceisg-MlsaHd Zum Suck Saenfsr Stewart 5dwMtt Schulz SdrMm 6 General Organigramme Organigramme of the Scientific Section Scientific Staff Colleges (for details see separate organigramme) Convenors: College Secretaries Colleges 2 Theory Physicists' Representatives 3 Fundamental and Nuclear Physics I Instrument Groups 4 Structural and Magnetic Excitations Scientific Coordination 5 Crystal and Magnetic Structures 6 Liquids, Disorder and Defects in Materials & Public Relations Office 8 Biology Physicists* Secretariat 9 Chemistry Library lnstrameal Operation Department Physicists' Representatives Head: A. Heidemann Scientific staff Instrument Groups 66 experimentalists ~~ Central Group 12 theoreticians