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Progress towards the ERLP at Daresbury

Progress towards the ERLP at Daresbury. Neil Bliss. ESLS Workshop 15-16 th November 2004. Contents. Aims & Objectives of Project Timescales Collaborations Technical priorities Progress on Design & Construction Funding Opportunities Acknowledgements.

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Progress towards the ERLP at Daresbury

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  1. Progress towards the ERLP at Daresbury Neil Bliss ESLS Workshop 15-16th November 2004 ESLS Workshop 15 - 16th Nov 04

  2. Contents • Aims & Objectives of Project • Timescales • Collaborations • Technical priorities • Progress on Design & Construction • Funding Opportunities • Acknowledgements ESLS Workshop 15 - 16th Nov 04

  3. Research, Development and Design Four years of funding for the research, development and design work needed to address the key challenges of the 4GLS facility. • establish and operate 4GLS ERL prototype facility • undertake 4GLS underpinning physics studies • collaborate where other international efforts are directed at addressing problems of common interest Aims: To enable the development of core skills and to gain ‘hands on’ experience to meet the 4GLS challenge • Timescale April 03 – March 07 • £14 million • Project Manager – Professor Elaine Seddon • Project Sponsor – Professor Colin Whitehouse, Director of Daresbury Laboratory ESLS Workshop 15 - 16th Nov 04

  4. 4GLS combines, for the first time, superconducting ERL, SR and FEL technology in a multi-source facility 4GLS: The Vision A world-leading synchrotron radiation facility to enable internationally outstanding science by the ‘low-energy’ community in the UK ESLS Workshop 15 - 16th Nov 04

  5. Timescales Case prepared for 4GLS Investment Decision ESLS Workshop 15 - 16th Nov 04

  6. Timescales Funded* Not yet funded Case prepared for 4GLS Investment Decision ESLS Workshop 15 - 16th Nov 04

  7. Timescales • Answer key questions defining layout Dec 04 • FEL layout options • 180 Bend • Beamline layouts • Engineering Layouts start Jan 05 • Further questions resolved Mar 05 • Switching • High current operation ESLS Workshop 15 - 16th Nov 04

  8. Timescales • 4GLS User Meeting April 05 • First review of costs July 05 • Detailed design for CDR April 05 to Nov 05 • Revise Layout & Costs Dec 05 • Produce Project Plan Jan 06 • Produce CDR Document Feb 06 • CDR Published end Feb 06 • TDR to follow … ESLS Workshop 15 - 16th Nov 04

  9. Collaborations • In October John Wood signed MoUs with • SLAC • Jefferson Laboratory • The agreements cover a broad spectrum of activities from accelerator studies through fast pulse diagnostics to scientific exploitation of FEL sources. • Already have links with DESY • Links with FZ Rossendorf (ELBE) developing • e2v ESLS Workshop 15 - 16th Nov 04

  10. Technical Priorities for the ERL Prototype Demonstrate energy recovery Operate a superconducting linac Produce and maintain bright electron bunches from a photo-gun Produce short electron bunches from a compressor Demonstrate energy recovery with an insertion device that significantly disrupts the electron beam Have an FEL activity that is suitable for the synchronisation needs Produce simultaneous photon pulses from a laser and a photon source of the ERL Prototype that are synchronised at or below the 1ps level ESLS Workshop 15 - 16th Nov 04

  11. Parameters • Nominal Gun Energy 350keV • Booster Energy Gain 8 MeV • Injector Energy 8.35 MeV • Linac Energy Gain 26.65 MeV • Circulating Beam Energy 35 MeV • Linac RF Frequency 1.3GHz • Bunch Duty Factor-1 16 • Bunch Repetition Rate 81.25 MHz • Bunch Spacing 12.3 nS • Max Bunch Charge 80 pC • Particles per Bunch 5 E+08 ESLS Workshop 15 - 16th Nov 04

  12. Parameters at long Pulse mode • Average Current 13 mA • Peak Current 6.5 mA • Average Power at Injector Energy 108.6 W • Average Power at Full Energy 455 W • Peak Power at Injector Energy 54.3 kW • Peak Power at Full Energy 227.5 kW ESLS Workshop 15 - 16th Nov 04

  13. ERLP Building Layout ESLS Workshop 15 - 16th Nov 04

  14. Accelerator Layout ESLS Workshop 15 - 16th Nov 04

  15. Elegant ASTRA GENESIS Elegant Gun to Booster Booster to FEL FEL Interaction FEL to Dump 0 to 8.35MeV 8.35/35MeV 35/8.35 MeV 250k particles 250k particles 106 particles 250k particles Start-to-end Simulations First case of modelling an ERL together with a FEL and energy recovery 1 4 3 2 ESLS Workshop 15 - 16th Nov 04

  16. ERLP output ESLS Workshop 15 - 16th Nov 04

  17. ERL Prototype Photoinjector ESLS Workshop 15 - 16th Nov 04

  18. ERL Prototype Photoinjector Commercial 500kV (350kV) 8mA DC Power Supply (Glassman Europe) Power supply and gun enveloped by 0.8 Bar SF6 environment ACCELERATOR HALL Shield wall DC Gun Based on Jlab design LASER ROOM Optical Table Booster Cavity Laser Beam Transport System ESLS Workshop 15 - 16th Nov 04

  19. Laser Requirements The commercial solution ESLS Workshop 15 - 16th Nov 04

  20. Diagnostics Diagnostics 290.94mm 290.94mm 1846.06mm 1846.06mm 1802mm 1802mm 1102mm 1102mm f=1750mm f=1750mm f=793mm f=793mm Chopper Chopper w w cell cell 2 2 Pockels Pockels laser laser Diagnostics Diagnostics f=610mm f=610mm f=762mm f=762mm Shutter Shutter Analyser Analyser l /2 plate Laser System Layout Plan View Schematic of Optical Table Layout ESLS Workshop 15 - 16th Nov 04

  21. Beam Transport System 2-6 mm beam size on the cathode Gaussian on day 1 Flat top in later phase ESLS Workshop 15 - 16th Nov 04

  22. Pulse Structure ESLS Workshop 15 - 16th Nov 04

  23. Light Box Cathode VacuumValve LightBox ESLS Workshop 15 - 16th Nov 04

  24. Gun Assembly Cathode ball Ceramic SF6 Vessel removed Cathode Electrons laser XHV Stem Anode Plate ESLS Workshop 15 - 16th Nov 04

  25. Ceramic • Controlled Resistivity Ceramic – WESGO • Surface Resistivity 105 -1013 W/sq • Surface Resistivity 1010 -1012 W/sq • Dielectric Strength 27 DC kV/mm • Colour Black • Material Al970CD • Delivery End of Jan 05 • Cost £36K ESLS Workshop 15 - 16th Nov 04

  26. Buncher Cavity 70 mm • Single Cell • 1.3 GHz • Longitudinal bunch compression • No Acceleration • Zero-phase crossing angle FZ Rossendorf Design Buncher cavity being manufacturedby Vacuum Generators UK, available for testing end of November 04. Cost £10K ESLS Workshop 15 - 16th Nov 04

  27. Booster & Linac Modules ESLS Workshop 15 - 16th Nov 04

  28. FZ Rossendorf Module Helium transfer line 100 W Shield at 80 K Liquid helium vessel 2 K Accelerating module Booster & Linac Modules ESLS Workshop 15 - 16th Nov 04

  29. Booster & Linac Modules Order placed in March 04 – on Accel • FZ Rossendorf Module – two TESLA cavities • Energy Gain 26.65 MeV • Independent control of Qext • Independent control of cavity phase • Delivery of module 1 (booster) due 28/11/05 • Delivery of module 2 (linac) due 6/3/06 • Cost £1.7m Tesla 9-cell cavity ELBE Type Cryostat with dual Tesla Linac Sections ESLS Workshop 15 - 16th Nov 04

  30. Cryogenics ESLS Workshop 15 - 16th Nov 04

  31. Cryogenics Order placed on Linde (TCF50) • Delivery due in May 05 • Cost £1.26m ESLS Workshop 15 - 16th Nov 04

  32. Inductive Output Tubes RF to be supplied by IOTs that are being developed by the RF group in collaboration with e2v • Higher frequency than standard IOT • High Frequency IOT – 1.3GHz & 1.5GHz • Cathode - grid transit time effects • Grid gap required – 0.125mm • Standard IOT – 0.18mm • Grid process capability • Cathode – grid gap setting • Integral output cavity • Ability to set / maintain the required frequency 50KV DC Power supply commissioned IOT’s available Now ESLS Workshop 15 - 16th Nov 04

  33. IOT 116LS Test Results ESLS Workshop 15 - 16th Nov 04

  34. Magnets • Being procured on a Performance Based Specification • Preliminary modelling has taken place with FEA codes; minimal engineering design • Field quality is responsibility of supplier. Magnets accepted on basis of magnetic measurements • Large quantity (40%) of the magnets being loaned from JLAB • 66 magnets in total required, 39 to procure • 9 Dipoles • 26 Quadrupoles • 4 Sextupoles • + 28 H/V Correctors • Tender Notice published OJEU 16th September • Return Date 3rd November • Bids received from 3 companies • Currently evaluating bids • Contract cost approx. £350K • Two delivery stages planned • Stage 1 (TL2) end of May 05 • Stage 2 (Arcs & Dump) end of July 05 Dipole A Good field:+/- 1x10-4over +/- 33mm Quad D Good gradient:+/- 1x10-3over +/- 42.5mm ESLS Workshop 15 - 16th Nov 04

  35. ERLP Layout New Magnets (39 off) JLAB Magnets (27 off) ESLS Workshop 15 - 16th Nov 04

  36. Power Converter Ratings & Performance • Quantity - All 66 magnets are individually powered. • Unipolar – Dipoles fitted with changeover circuit. • Interface – Remotely operated with analogue control. • Standardisation – Magnet ratings matched to reduce converter spares. • Operating range - 0 to 100% rated O/P current. • Stability - ± 100 ppm long term, measured at ± 20ppm over 4 hrs. • Reproducibility - ± 200 ppm over a 24 hr period. • Resolution – 16 bit (15ppm) ESLS Workshop 15 - 16th Nov 04

  37. Diagnostics Summary Beam position monitor (¾ ) • beam position • longitudinal bunch structure • current measurement • beam loss reference measurement. Unit A: H& V Slits/ pepper pot/ viewer • beam size directly • emittance measurement. Transverse kicker cavity - longitudinal characterisation of the beam. Analyser magnet • energy and energy spread Units B: Viewer and vertical slit • emittance • image the beam • energy spread measurement. Unit C/E: Viewers • energy spread measurements • emittance measurements at the position of the first accelerating cell Faraday Cup • temporal structure of the pulse • total charge in the pulse • energy and energy spread ESLS Workshop 15 - 16th Nov 04

  38. Diagnostics Summary • 14 Optical Transition Radiation (OTR’s) Beam Viewers • 3 Florescent Screens (YAG’s) • Stripline EBPM 14 locations • Button EBPM 12 locations • Faraday Cup (in TL 2) • Total Current Monitor • Electro–optic sampling monitor Pneumatic operated mechanism Beam impedance screen Al foil OTR ESLS Workshop 15 - 16th Nov 04

  39. Stripline EBPM / Corrector coils Section Corrector Coils ESLS Workshop 15 - 16th Nov 04

  40. Arc EBPM Arc Dipole Magnet EBPMs ESLS Workshop 15 - 16th Nov 04

  41. Building Work Progress • Renovation of old SF6 tanks for gaseous He • Laser room approaching completion • Ventilation system for control and diagnostics rooms being installed • Rack room well advanced • Bulk internal shielding complete (more than 2000 tonnes of concrete moved) • Plinths for external labyrinths laid ESLS Workshop 15 - 16th Nov 04

  42. Laser & Diagnostics Rooms ESLS Workshop 15 - 16th Nov 04

  43. Assembly Building ESLS Workshop 15 - 16th Nov 04

  44. Magnet Test Room ESLS Workshop 15 - 16th Nov 04

  45. Module 1 - Transfer Line 2 • Modular • Majority of vacuum joints made in clean room • Services can be fitted • Modules can be built in parallel OTR Quadrupole Magnet Dipole Magnet Lifting Points Girder Corrector Coil and EBPM Assembly Ion Pump Support Pedestal ESLS Workshop 15 - 16th Nov 04

  46. Module 4 - Injection Chicane Injection Chicane Vessel Camera Tube OTR Ion Pump DU Magnet DV Magnet ESLS Workshop 15 - 16th Nov 04

  47. Module 16 - Compression Chicane Port for OTR Compression Chicane Chamber Chamber Support Magnet Support Bolt on castors for use in assembly area Dipole Magnet DW Quadrupole Magnet ESLS Workshop 15 - 16th Nov 04

  48. Survey points Magnet Adjustment Assembly Philosophy, Supports and Adjustment Systems 1st position the Magnets in their modules in the assembly building. 4 survey points per magnet Position of survey points to magnetic centre accurately known. 2nd Locate and drill pedestals in the Tower – position not critical 3rd Survey modules into position in the tower Survey grid as global reference 4 survey points per girder Girder adjustment Pedestal This philosophy ensures that the magnetic centres of all the magnets are accurately positioned with respect to each other. ESLS Workshop 15 - 16th Nov 04

  49. Survey Equipment Faro Laser Tracker Repeatability 1m +1 m /m Accuracy 10 m + 0.8 m /m Uncertainty ≈ 10 m /m Portable Robust Spatial Analyzer Metrology Software Error Simulations Multiple instruments/types Automation ESLS Workshop 15 - 16th Nov 04

  50. Z Local zone within ± 2.5m Global within ± 15m Yaw Pitch Transverse X, Z ± 0.1 mm ± 0.5 mm Roll X Y Y ± 0.5 mm ± 2.5 mm Pitch ± 0.2 mR Roll Yaw ± 0.05 mR/m measuring length ± 0.5 mR for 150 mm long quadrupoles ERLP Positional Tolerances Co-ordinate System ESLS Workshop 15 - 16th Nov 04

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