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PSI • Scientific Report 1999 / Volume VII I i - CH- CH0000008 PAUL SCHERRER INSTITUT ISSN 1423-7369 March 2000 PSI • Scientific Report 1999 / Volume VII Swiss Light Source ,'V 3 1/2 A view inside the SLS tunnel shows that the installation of the machine is fully under way. In the center, one sees the girders of the storage ring with quadrupole and sextupole magnets. In the foreground, the upper halves of the magnets are taken off and the vacuum chamber with flanges and pumps is visible. The booster is mounted on the right hand side of the tunnel. At the top, one sees the outlets for the cooling system. In the background, one can identify the square holes in the shielding wall for the outgoing X-ray beams. PAUL SCHERRER INSTITUT ISSN 1423-7369 _ March 2000 Scientific Report 1999 Volume VII Swiss Light Source ed. by: Heinz Josef Weyer, Marlen Bugmann, Christine Schiitz CH-5232 Villigen PSI Switzerland Phone: 056/310 21 11 Telefax: 056/310 21 99 http://www.psi.ch/sls TABLE OF CONTENTS Introduction, SLS General 1 THE SWISS LIGHT SOURCE CONSTRUCTION PROGRESS 2 SLS Accelerator, Overview 7 STATUS OF THE SLS PRE-INJECTOR 8 THE SLS BOOSTER 11 THE SLS STORAGE RING 13 SLS Accelerator, Details 17 THE SLS STORAGE RING GIRDER AND MOVER SYSTEM 18 PRODUCTION AND MEASUREMENT OF THE MAGNETS FOR BOOSTER AND STORAGE RING 21 PULSED MAGNETS 23 SLS DIGITAL BEAM POSITION MONITOR SYSTEM: FIRST RESULTS 25 SLS LINAC AND TRANSFER LINE DIAGNOSTICS 28 SURVEY AND ALIGNMENT IN 1999 30 STATUS OF THE SLS CONTROL SYSTEM 32 POWER SUPPLIES FOR SLS 35 A COBRA BASED CLIENT-SERVER MODEL FOR BEAM DYNAMICS APPLICATION AT THE SLS 37 STUDIES ON BEAM LIFETIME AND LATTICE IMPERFECTIONS IN THE SLS STORAGE RING 39 DC-LINK CONTROL FOR A 1 MVA-3 HZ SINGLE PHASE POWER SUPPLY 41 Beamlines, Overview 47 OVERVIEW AND STATUS OF THE BEAMLINES 48 Beamlines, Details 51 SLS FRONT ENDS FOR INSERTION DEVICE BEAMLINES 52 INSERTION DEVICES FOR SLS 54 THE SURFACE/INTERFACE: MICROSCOPY BEAMLINE 58 SURFACE AND INTERFACE: SPECTROSCOPY BEAMLINE 60 PLANE GRATING MONOCHROMATORS FOR SLS SOFT X-RAY BEAMLINES 62 THE MATERIALS SCIENCE BEAMLINE 64 SIMULATION AND MANUFACTURING OF A HIGH HEAT LOAD MONOCHROMATOR CRYSTAL MOUNT 66 STATUS OF THE PROTEIN CRYSTALLOGRAPHY BEAMLINE 68 THE IN-VACUUM FLEXURAL HINGE BASED DYNAMIC MIRROR BENDER FOR THE PROTEIN CRYSTALLOGRAPHY BEAMLINE 70 STATUS OF THE PIXEL DETECTOR DEVELOPMENT 72 MEASUREMENT OF CHARGE SHARING EFFECTS WITH A SINGLE PHOTON COUNTING PIXEL DETECTOR 73 MICROSTRIP DETECTOR FOR THE POWDER DIFFRACTION FACILITY 74 CONTROLS AND DATA ACQUISITION FOR THE SLS BEAMLINES 75 POSITIONING SUBSYSTEM FOR THE FRONT ENDS AND BEAMLINES 76 Scientific Reports 79 ON THE MOSAICITY OF CRYOGENICALLY-COOLED PROTEIN CRYSTALS 80 PROTEIN CRYSTALLOGRAPHIC RESEARCH ACTIVITY AT THE ESRF 82 INVESTIGATION OF TRACE ELEMENTS FOR TUMOR THERAPY USING PHOTOEMISSION ELECTRON MICROSCOPY 84 ELECTRONIC AND GEOMETRIC STRUCTURE OF THE ARSENIC TERMINATED Si(111) SURFACE MEASURED WITH AN ELLIPTICAL DISPLAY ANALYZER 86 COMBINED DIFFRACTION AND DISPERSIVE EXAFS STUDY UNDER HIGH PRESSURES ON CeNi5.xCux 88 DIRECT OBSERVATION OF 1-DIMENSIONAL CHARGE ORDER IN Yb4As3: A RESONANT X-RAY DIFFRACTION STUDY 89 MAGNETIC ORDERING IN Li2Cu02 STUDIED BY |uSR TECHNIQUE 90 THE ELECTRONIC PROPERTIES OF Yb IN YbB12 91 THE ELECTRONIC PROPERTIES OF Pr IN PrBa2Cu307^ STUDIED BY DAFS 92 TIME-RESOLVED X-RAY ABSORPTION SPECTROSCOPY EXPLOITING PULSED SYNCHROTRON RADIATION: NASCENT HALOGEN RADICALS IN WATER 93 EXPLORING SYNCHROTRON RADIATION CAPABILITIES: THE SLS TECHNO TRANS AG 96 APPENDIX 99 Introduction, SLS General THE SWISS LIGHT SOURCE CONSTRUCTION PROGRESS A. Wrulich (PS!) In 1999 the SLS was entering the 3rd year of the four years construction period. After two years for design and procurement, installation could start on July f after the storage ring and the technical gallery could be taken over dust free from the construction company. An overview is given on the progress of the work. OVERVIEW STATUS In spite of the adverse weather conditions in the fore- Linac going winter, the General Contractor (GC) was able to maintain the major building milestones, in September Although the official date for 'Start of Linac commis- finally, the SLS team could be united and moved from sioning' was March 1st 2000, we were working on an dispersed places of the PSI to their offices in the new accelerated time schedule which foresaw first tests building. already at the end of the year 1999. It turned out that this approach was too optimistic, since technical diffi- culties for the inductive brazing of the accelerating structures delayed the delivery. Nevertheless, fabrica- tion of the components (i.e. gun, buncher section and two accelerating structures) and delivery to PSI were completed before the end of 1999. The klystrons with their power system were delivered in September and tested up to 35 MW on a dummy load. Preliminary gun tests were performed at DELTA in September in order to demonstrate the 500 MHz pulsing for single bunch and multi-bunch operation. The transfer line from the linac to the booster inside the Linac tunnel was installed, as well as the diagnos- tic line for beam parameter measurements, such as energy, energy spread and emittance. The diagnostics of the Linac, including optical moni- Fig. 1: SLS Building. tors, position monitors and current measurement de- There was still work going on for the basic technical vices, was supplied by SLS and installed together with infrastructure which was part of the original GC con- the accelerator components [2]. tract. Additional infrastructure systems were added by The control system, also provided by SLS was opera- a contract extension. Since the GC was able to com- st tional at the end of the year for handling radio fre- plete this additional work also before July 1 , the quency, vacuum, diagnostic and magnets. Operator starting conditions were strongly improved. For in- tools were installed, allowing save/restore, archiving stance, the installation of the concrete sockets for the and alarm handling [3]. girders of the storage ring and the mounting of the booster consoles on the inner wall of the tunnel were Booster part of this extension contract. With this preconditions, No relevant delays were accumulated for the booster the chances to meet the overall project milestones components. Magnet delivery started in September for were enhanced. The aim was also to maintain the self the combined function bending magnets and in Octo- imposed project milestones with sequential commis- ber for quadrupoles and sextupoles. The first magnets sioning of the three accelerator systems, i.e. Linac in went into the tunnel on October 22nd. Out of the total March 2000, Booster in July 2000, and finally Storage 273 magnets, 240 were delivered by the end of the Ring in January 2001. year. From 93 combined function magnets (BF,BD) The Project Group leaders became responsible for the about 50% were installed in the ring. The delivery of preparation of the installation procedures and the fol- the booster vacuum chambers was completed already low up of the proper installation of their components. in August 1999. One section covering two bending The activities on the floor and the insertion of auxiliary magnets was installed in the tunnel for test purposes personnel were coordinated by an Installation team, in October. All 39 chambers with position monitors strongly supported by GFA [1]. integrated and vacuum pumps attached were ready for installation. The RF power system and klystron for the Booster were installed and tested in November. The cavity for the booster arrived as scheduled in December and was installed directly in the accelerator tunnel. The main power supply for the booster magnet was ready for tests in August and revealed very satis- factory performance. The designs for the remaining fore the coating of the ceramic chambers becomes types were completed and fabrication was started. less critical [4]. A full prototype vacuum sector was assembled April 1999. Extensive tests with very satisfactory results V were performed, including bake out of the structure in the oven which was delivered in April. In view of the great importance of the vacuum system for the SLS, it t I was decided to make some system upgrades, partly based on recommendations from the vacuum review held in July 1999. After the provisional installation of the vacuum hutch in the experimental area of the SLS, the assembly of the first chamber for the storage ring ,-l:y~:'% ±- <*- could be completed with subsequent bake out before the end of the year and the installation in the storage ring in January 2000. •Us^i? -i Fig. 2: Cavity installed in the accelerator tunnel with connection to the RF power system. * '• • Storage Ring Prototypes of all different magnet types were delivered at the beginning of 1999. For magnetic measure- ments, the existing hall probe measurement bench at the PSI was upgraded with an AC system and used for the prototypes. New hall probe systems and rotating coil system (RCS) were installed for series measure- ments. The RCS is installed in a hutch in the experi- mental area of the SLS which later on will be con- verted into a measurement laboratory for insertion devices. All series bending magnets were measured Fig. 3: Placement of the first sector vacuum chamber at PSI. Since the quality of the quadruples and sex- on the opened magnets of one achromat. tupoles is crucial for the functioning machine, mag- netic measurements were made at the factory and Fabrication of the RF-system was progressing well. afterwards verified at PSI. Series delivery was started Factory acceptance tests of the klystrons were done in in June for the bending magnets and in Ocotber for October. The fabrication of the cavities at the com- the multipoles.
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