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Overview Project Status LCLS user workshop Collaboration with TESLA Project R&D

Linac Coherent Light Source Update John N. Galayda, Stanford Linear Accelerator Center 5 November 2002. Overview Project Status LCLS user workshop Collaboration with TESLA Project R&D. Overview. The world’s first hard x-ray laser Unprecedented brightness, Unprecedented time resolution

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Overview Project Status LCLS user workshop Collaboration with TESLA Project R&D

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  1. Linac Coherent Light Source UpdateJohn N. Galayda, Stanford Linear Accelerator Center5 November 2002 • Overview • Project Status • LCLS user workshop • Collaboration with TESLA • Project R&D John N. Galayda, SLAC

  2. Overview • The world’s first hard x-ray laser • Unprecedented brightness, Unprecedented time resolution • 0.8 – 8 keV SASE Free Electron Laser • Electron beam 4.5 – 14.35 GeV, from SLAC Linac • Peak power in SASE bandwidth 8 GW • Peak brightness 1033 photons/(mm2 mr2 0.1%BW) • Pulse duration  230 femtoseconds • Pulse repetition rate 120 Hz John N. Galayda, SLAC

  3. LCLS Operating Ranges John N. Galayda, SLAC

  4. SLAC Linac Undulator Hall Two Chicanes for bunchcompression FFTB Tunnel Linac Coherent Light Source 1992: Proposal (C. Pellegrini) 1998: Preliminary Design Study Completed 1999: R&D funded at $1.5M/year 2001: CD-0 2002: Conceptual Design http://www-ssrl.slac.stanford.edu/lcls/CDR/ 2003: Project Engineering Design begins 2005: Long-Lead Procurements begin 2006: Construction begins 2007: First Light 2008: Project completion John N. Galayda, SLAC

  5. Conventional Construction • Final Focus Test Beam Extension • Hall A • Tunnel • Hall B John N. Galayda, SLAC

  6. Estimated Cost, Schedule • $200M-$240M Total Estimated Cost range • $245M-$295M Total Project Cost range • Schedule: • FY2003 Authorization to begin engineering design • Emphasis on injector and undulator • FY2005 Long-lead purchases for injector, undulator • FY2006 Construction begins • January 2007 Injector tests begin • October 2007FEL tests begin • September 2008 Construction complete John N. Galayda, SLAC

  7. Construction Strategy • 2003 – Project Engineering Design Begins • $6M budget • Prepare for Long-lead procurements in 2005 • Undulator • Gun Laser • Injector Linac Systems • Spring 2003 – review of plans for long lead procurements • CD-2A Go-ahead required • Spring 2004 – Complete Preliminary Design of LCLS • CD-2 requirements complete for entire project • October 2004 – begin long-lead procurements • Summer 2005 – Critical Decision 3 – Approve start of construction • Winter 2007 – Begin FEL commissioning • October 2008 – Project Complete John N. Galayda, SLAC

  8. 2002 FY2001 2003 FY2002 FY2003 2004 2005 FY2004 2006 FY2005 FY2006 FY2008 FY2009 FY2007 Preliminary Schedule CD-0 CD-1 CD-2b CD-3b CD-2a CD-3a Critical Decision 0 – Mission Need June 13, 2001 Critical Decision 1 – Preliminary Baseline Range September 2002 Start Project Engineering Design October 2002 Critical Decision 2a – Long-Lead Procurement Budget Spring 2003 Critical Decision 2b – Performance Baseline April 2004 Critical Decision 3a – Start Long-Lead Procurements August 2004 Fund Long-Lead Procurements October 2004 Critical Decision 3b – Start Construction August 2005 Fund Construction October 2005 Construction Complete End of FY2008 John N. Galayda, SLAC

  9. Project Planning/Approval Status • Critical Decision 1 Approved 16 October 2002 • Conceptual Design is judged sound • Preliminary Hazard Analysis accepted • Acquisition Execution Plan accepted • Preliminary Project Execution Plan accepted • Project Engineering Design Funds - $6M requested in 2003 • LCLS PED funds are in House and Senate Committee Markups • LCLS PED is considered a New Start • Allocation under the continuing resolution budget is $0 • Not quite as bad as it sounds John N. Galayda, SLAC

  10. Workshop – Experimental Opportunities with LCLS – 8-9 October 2002 The LCLS Project is in its initial phase with a construction start scheduled for FY 2006. The DOE is planning to provide specific funding for construction of experiments after Critical Decision 3 (start of LCLS construction) has been taken, expected in mid 2005 calendar year. However, DOE will, starting in FY2003, review and fund proposals for research needed to design an LCLS experiment. The purpose of this Planning Workshop is to provide prospective LCLS researchers with the information necessary to start the experiment planning process. It will also mark the beginning of a dialog between future LCLS experimenters and the Project Team that will shape the development of the LCLS from conceptual design to running facility. 30 Attendees, including “first Experiments” co-authors Discussed Proposal/Review Sequence LCLS Scientific Advisory Committee, chaired by Roger Falcone, UCB Identification of R&D needs prerequisite to proposals • Timing and related diagnostics • Detectors • Damage studies John N. Galayda, SLAC

  11. LCLS Science Program based on the SSRL Model • Experiment Proposals will be developed by leading research teams with SSRL involvement • Proposals will be reviewed by the LCLS Scientific Advisory Committee • Research teams secure outside funding with SSRL participation and sponsorship as appropriate • SSRL will manage construction • Provides cost and schedule control, rationalized design • Provides basis for establishing maintenance and support infrastructure • SSRL will partner with research teams to commission endstations • “General user” mode with beam time allocation based on SAC recommendations John N. Galayda, SLAC

  12. Workshop – Experimental Opportunities with LCLS – 8-9 October 2002 • Proposal sequence • LCLS actions • Prepare proposal guidelines • Call for letters of intent • Target late Spring 2003 for submission deadline • LCLS Scientific Advisory Committee Review • Request Pre-proposal R&D funds if necessary • Proposals reviewed by SAC • DOE will review/approve proposals in 2005 time frame John N. Galayda, SLAC

  13. SLAC-DESY/TESLA FEL Collaboration • 1 November SLAC/DESY FEL Collaboration Workshop Albrecht Hermann Ray Jonathan Wagner Schunck Orbach Dorfan Director Ministry of DOE Office Director DESY Science/Education of Science SLAC John N. Galayda, SLAC

  14. SLAC-DESY/TESLA FEL Collaboration • January 2000 Memorandum of Understanding • SLAC-DESY-KEK FEL R&D • SLAC will deliver a bunch length measurement system to TTF • Expanded SLAC-DESY Collaboration, November 1 2002 • Sub-Picosecond Photon Source at SLAC (SPPS) • 9 kev x-rays using SLAC linac and Final Focus Test Beam • 12/2002 DESY personnel will participate in commissioning • 2003-2006 DESY will join in SPPS experiments • TESLA Test Facility • 2003-2004 SLAC personnel will participate in commissioning • 2005-2006 SLAC participation in experiments to control temporal coherence • LCLS • 2007-2008 TESLA-XFEL Participation in tests of optics • TESLA • 2011—SLAC participation in TESLA-XFEL Commissioning John N. Galayda, SLAC

  15. Common Challenges- High Brightness Electron Sources • Photocathode • Laser • Numerical techniques for gun design • Verification with experiment • Diagnostic Techniques John N. Galayda, SLAC

  16. 300pC head tail Spectrometer Image of Slice Quad Scan Data Peak Current (A) 150 100 Instantaneous Peak Current 50 Time (ps) 0 -1.5 -1 -0.5 0 0.5 1 2 n (mm mrad) 1 Slice Emittances 0 5 10 Slice number Photocathode Gun R&D Gun R&D BNL/SLAC/UCLA Gun has been proven as an FEL driver at BNL-ATF and ANL Basis of KEK, Frascati FEL designs Design verification at the SSRL Gun Test Facility Limborg, C. et al., “PARMELA versus Measurements for GTF and DUVFEL” Proceedings of the 2002 European Particle Accelerator Conference, Paris 3-7 June 2002, pp. 1786-1788 John N. Galayda, SLAC

  17. 150 MeV z  0.83 mm   0.10 % 1.5 Å 8 GW z  0.023 mm 250 MeV z  0.19 mm   1.8 % 4.54 GeV z  0.023 mm   0.76 % 4.54-14.35 GeV z  0.023 mm   0.02 % 7 MeV z  0.83 mm   0.2 % Linac-X L =0.6 m RF Gun 15 Å 17 GW z  0.023 mm new Undulator L =121.8 m Linac-1 L =9 m Linac-2 L =330 m Linac-3 L =550 m Linac-0 L =6 m 21-1b 21-1d 21-3b 24-6d 25-1a 30-8c X ...existing linac BC-1 L =6 m DL-1 L =12 m BC-2 L =22 m Beam Dump DL-2 L =66 m Undulator Hall Exp Halls SLAC linac tunnel 140 MeV 500 MeV 2.5 GeV Common Challenges - Acceleration/Compression John N. Galayda, SLAC

  18. SC-wiggler damps bunching Common Challenge – Coherent Synchrotron Radiation bend-plane emittance growth January 14-18, 2002 at DESY-Zeuthen (Berlin, GERMANY) DE/E = 0 s Dx Chicane CSR Test-Case DE/E < 0 • Coherent Synchrotron Radiation • Theory • Numerical computations: • ANL, SLAC, TESLA, JLAB, ENEA • Experiment • Short, high current bunches S. Heifets, S. Krinsky, G. Stupakov, SLAC-PUB 9165, March 2002 Z. Huang, K. J. Kim, PRSTAB 5 074401(2002) E. Saldin, et al. TESLA-FEL 2002-2 (submitted to NIM) John N. Galayda, SLAC

  19. Theory (wig OFF) Theory (wig ON) Tracking (wig OFF) Tracking (wig ON) coherent radiation forl > sz sz l L0 e– R  overtaking length: L0  (24szR2)1/3 (After BC1) Coherent Synchrotron Radiation Definitive work in Coherent Synchrotron Radiation theory, modeling Z. Huang, et al. PRSTAB 5, 074401 (2002) S. Heifets, et al. SLAC-PUB-9165, 3/2002 P. Emma,2002 European Part. Accel. Conf. John N. Galayda, SLAC

  20. RF ‘streak’ 2.44 m V(t) sx e- sz D 90° Beam pipe Electron bunch Co-propagating Laser pulse Spectrometer EO Crystal Analyzer Polarizer I wl t ws t Bunch charge Gated spectral signal Initial laser chirp Short Bunch Diagnostics Tests Planned for TESLA, SLAC P. Emma, J. Frisch, P. Krejcik, G. Loew, X.-J. Wang S-band Added to TTF-II Tested at SLAC Tested at TTF Added To SPPS John N. Galayda, SLAC

  21. SASE Light Pulse length LCLS Simulation SASE light pulse shorter than electron bunch LCLS Studies ongoing re: controllability TTF x-ray pulse length data John N. Galayda, SLAC

  22. Si monochromator (T = 40%) 230 fs 10 fs e- 30 m 52 m 43 m Common Goals – Seeding, Harmonic Generation John N. Galayda, SLAC

  23. News from DESY • A more modest start for the TESLA XFEL Laboratory • 20 GeV linac • 3 FEL undulator sources • 2 Spontaneous undulator sources • New Technical Design Report, budget submitted to German Science Council • DESY 2002-167, TDR to be released shortly • More results from TTF: http://www.aps.anl.gov/fel2002/talks/talks.html J. Schulz, Coulomb Explosion of Rare Gas Clusters Irradiated by Intense VUV Pulses of a Free Electron Laser J. Krzywinski, Interaction of Intense, Femtosecond Soft X-ray Pulses with Solids: Desorption, Ablation and Plasma Formation by TTF FEL SASE Radiation John N. Galayda, SLAC

  24. 50 ps FFTB 9 ps 0.4 ps <100 fs SLAC Linac 12-meter chicane compressor 5-meter undulator 1 GeV 20-50 GeV Sub-Picosecond Pulse Source Ultrafast laser/x-ray physics - the Sub-Picosecond Photon Source • The SPPS collaboration will develop experimental techniques essential to LCLS science • Synchronization • Short pulse diagnostics for x-ray beams • Control of timing and pulse length • Chicane installed • Wiggler inside FFTB tunnel • Construction of x-ray beamline underway • Chicane tests November-December 2002 • X-ray experiments begin May 2003 John N. Galayda, SLAC

  25. Undulator R&D LCLS Undulator Prototype Horizontal Trajectory Microns • Prototype construction complete • Field quality specifications met • Ongoing investigation of thermal stability John N. Galayda, SLAC

  26. Conclusion • LCLS poised to start Project Engineering Design • PED for FY2003 - Preliminary design of undulator, injector – CD-2A • LCLS Collaboration well-matched to LCLS challenges • Accelerator science and technology • Synchrotron radiation research and instrumentation • Project management experience • Experiment Program Planning underway, based on successful SSRL model • LCLS pre-proposal R&D requests starting FY2003 • Proposals for LCLS science in FY2006-FY2006 John N. Galayda, SLAC

  27. Selected LCLS Baseline Design Parameters Fundamental FEL Radiation Wavelength 1.5 15 Å Electron Beam Energy 14.3 4.5 GeV Normalized RMS Slice Emittance 1.2 1.2 mm-mrad Peak Current 3.4 3.4 kA Bunch/Pulse Length (FWHM) 230 230 fs Relative Slice Energy Spread @ Entrance <0.01 0.025 % Saturation Length 87 25 m FEL Fundamental Saturation Power @ Exit 8 17 GW FEL Photons per Pulse 1.1 29 1012 Peak Brightness @ Undulator Exit 0.8 0.06 1033 * Transverse Coherence Full Full RMS Slice X-Ray Bandwidth 0.06 0.24 % RMS Projected X-Ray Bandwidth 0.13 0.47 % * photons/sec/mm2/mrad2/ 0.1%-BW John N. Galayda, SLAC

  28. End of Presentation John N. Galayda, SLAC

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