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Injector Lasers Overview Sasha Gilevich, SLAC April 29, 2004

Injector Lasers Overview Sasha Gilevich, SLAC April 29, 2004. Drive Laser Specifications Challenges System Description Laser Procurement R&D Effort UV conversion. 04/29/2004. Sasha Gilevich. Lasers Overview. Gilevich@slac.stanford.edu. Sector 20 Laser. Laser Bay. Drive Laser.

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Injector Lasers Overview Sasha Gilevich, SLAC April 29, 2004

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  1. Injector Lasers OverviewSasha Gilevich, SLACApril 29, 2004 • Drive Laser Specifications • Challenges • System Description • Laser Procurement • R&D Effort • UV conversion 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  2. Sector 20 Laser Laser Bay Drive Laser Transport Tube 10 m Laser Heater Accelerators RF Gun UV Launch and Condition. 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  3. Laser Bay 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  4. UV Beam Specifications at Photocathode 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  5. UV Beam Specifications at Photocathode (cont.) 04/29/2004 04/29/2004 Sasha Gilevich Sasha Gilevich Sasha Gilevich Lasers Overview Lasers Overview Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu

  6. Challenges • Short rise/fall time Requires temporal pulse shaping • Reliability The system should operate 24x7 • Pumping system Life time of the flash lamp – about 300-500h => Changing Lamps Every ~2wks Laser Diode Lifetime ~ 10000hr Changing Diodes Every ~ 60 wks (~1 yr) • UV conversion unit • Shaping hardware • Automatic Operation 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  7. Losses Net Transport and UV Conversion Efficiency – 0.7 – 2.1% 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  8. Drive IR Laser Specifications 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  9. Drive IR Laser Specifications (cont.) 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  10. Drive Laser TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) TiS Oscillator (119MHz) Pulse Shaper Pulse Shaper Pulse Shaper Pulse Shaper Pulse Shaper Pulse Shaper Pulse Shaper Stretcher Stretcher Stretcher Stretcher Stretcher Stretcher Stretcher Stretcher Stretcher Stretcher Amplifiers (preamplifier + final amplifier) Compressor UV Converter IR specs Pumps Pumps To the Laser Heater Transport to the Tunnel To EO Diagnostics To the Cathode UV Launch and Conditioning (at the Gun) UV specs Sasha Gilevich 04/29/2004 Lasers Overview Gilevich@slac.stanford.edu

  11. Drive Laser Development by Outside Vendors All three companies • Demonstrated capability to build the IR system according to the specs • Can ship the system in 12 months • Can provide full integration • Will have service agreement • Showed similar estimated costs • Need some development to be done • Have expertise in UV conversion Sasha Gilevich 04/29/2004 Lasers Overview Gilevich@slac.stanford.edu

  12. Drive Laser Development by Outside Vendors Procurement Plan: • Prepare Bid Package – June 2004 • Receive Vendors Proposals – August 2004 • Have Technical Review of Proposals – September 2004 • Evaluate the proposals – September 2004 • Issue the Award – October 2004 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  13. Drive Laser Design Issues Unresolved Issues: • Choice of the Temporal Pulse Shaping Technology • Amplification of the Temporally shaped pulses • Efficient UV Conversion of broadband temporally shaped pulses • 25 mJ in the IR at 120 Hz is difficult R&D: • Temporal shaping R&D conducted with BNL • UV conversion R&D with ANL • Experiments at SLAC with spectral filtering • Modeling of the UV conversion using SNLO software • Temporal Shaping development by the outside vendor • UV Conversion development by outside vendor 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  14. R&D Effort • UV Conversion (ANL/SLAC) • Baseline UV Conversion tests • Spatial Profile Shaping • UV Launching 04/29/2004 04/29/2004 Sasha Gilevich Sasha Gilevich Sasha Gilevich Lasers Overview Lasers Overview Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu

  15. R&D Effort • Pulse Shaping (BNL/INFN/SLAC) • Baseline Pulse Shaping Tests • UV Conversion Tests with Pulse Shaping • Evaluate Effects of Shaping on the E-beam • Pulse Shaping (SLAC) • Temporal Shaping of IR pulses with spectral filtering and compressor tuning 04/29/2004 04/29/2004 Sasha Gilevich Sasha Gilevich Sasha Gilevich Lasers Overview Lasers Overview Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu

  16. UV Conversion UV Conversion Setup λ=765nm λ=765nm Dichroic Separation Unit Dichroic Separation Unit Dichroic Separation Unit Dichroic Separation Unit Dichroic Separation Unit Dichroic Separation Unit Dichroic Separation Unit Dichroic Separation Unit λ=382.5nm λ=255nm THG Nonlinear crystal THG Nonlinear crystal SHG Nonlinear crystal SHG Nonlinear crystal SHG Nonlinear crystal To the Laser Heater To the Laser Heater To the Photocathode To EO Diagnostic To EO Diagnostic To EO Diagnostic 04/29/2004 04/29/2004 04/29/2004 Sasha Gilevich Sasha Gilevich Lasers Overview Lasers Overview Lasers Overview Gilevich@slac.stanford.edu Gilevich@slac.stanford.edu

  17. UV Conversion Modeling • Optimizing the crystals • Type of crystal • Crystal Length • Optimizing the input beam • Beam Diameter • Beam Shape • Input (IR and blue) beams energy ratio (for THG) • Considering different setup methodology 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  18. Nonlinear Crystals SHG 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  19. Nonlinear Crystals THG 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  20. UV Conversion Modeling Choice of the Crystal SHG BBO narrowband output LBO narrowband output LBO accept bandwidth BBO accept bandwidth 04/29/2004 04/29/2004 Sasha Gilevich Lasers Overview Lasers Overview Gilevich@slac.stanford.edu

  21. UV Conversion Modeling Choice of the Crystal THG BBO narrowband output KDP narrowband output 04/29/2004 04/29/2004 Sasha Gilevich Lasers Overview Lasers Overview Gilevich@slac.stanford.edu

  22. UV Conversion Modeling Spatial Shaping Input 20mJ T=10ps Narrowband Shaped Gaussian Shaped Gaussian 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  23. UV Conversion Modeling Spatial Shaping 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  24. UV Conversion Modeling Temporal and Spatial Shaping SHG BBO I L=1mm Input E=20mJ Pulse Duration = 10 ps 400nm 800nm Output 800nm Beam Output 400nm Beam 04/29/2004 Sasha Gilevich 04/29/2004 Lasers Overview Lasers Overview Lasers Overview Gilevich@slac.stanford.edu

  25. Status • The Laser Specifications are defined • Potential vendors were selected • Requirements for the Laser Bay are specified • R&D effort is outlined • Baseline WBS has been completed • Preliminary layout of the Gun Region is underway 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  26. Drive Laser Overview Milestones • Issue Request for proposals – June 2004 • Review of Proposals – September 2004 • Issue Award - October 2004 • Completion of R&D – December 2004 (preliminary data – September 2004) • Receive the IR Drive Laser – October 2005 • Start Installation – October 2005 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  27. Temporal Pulse Shaping with the Dazzler Preliminary Results Using an Acousto-optic Dispersive Filter For Laser Pulse Shaping A Ghigo, F. Tazzioli, C.Vicario, S. De Silvestri, M. Nisoli, S. Stagira, I Boscolo, S. Cialdi, L. Serafini INFN 04/29/2004 Sasha Gilevich Lasers Overview Gilevich@slac.stanford.edu

  28. UV to the Cathode

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