Injector Drive Laser Update Sasha Gilevich, Dave Dowell FAC Review, October 12, 2004

1. Injector Drive Laser UpdateSasha Gilevich, Dave DowellFAC Review, October 12, 2004 Drive Laser S20 Facility Overview Procurement Plan Request for Proposals Perspective Vendors Launch and Conditioning System Design UV Conversion of Temporally Shaped Pulses Preliminary Pulse Shaping Results X-Ray Endstation Laser Specifications Summary and Conclusions

2. Sector 20 Sector 20 Alcove Laser Bay Drive Laser Drive Laser System Transport Tubes Transport Tube Laser Heater RF Gun Laser Heater UV Launch and Condition. Photocathode Gun & Launch System Electron Diagnostic

3. Layout of Laser Room at S20 • Space & Utilities for 2 Drive Lasers

4. Drive Laser Technical Review July 21, 2004 Evaluate RFI & Technical Review Responses Write Request for Proposal (RFP) Write Request for Information (RFI) Write & Approve Advance Procurement Plan (APP) Submit RFP to Vendors Evaluation Committee Selects Vendor & Awards Contract Selected Vendors Present Proposals To Evaluation & Technical Committees Drive Laser Evaluation Committee Ranks Proposals Drive Laser Procurement Process

5. UV Pulse Specifications 1. Longer wavelength is acceptable, but requires higher energy due to the reduction in cathode QE 2. Measured with respect to the 119 MHz clock – RF signal 3. The temporal pulse shape is nominally flat but the slope of the pulse must be adjustable from -10% (head 10% higher than the tail) to +20% (head 20% lower than the tail). Some adaptive temporal shaping will be required

6. UV Pulse Specifications 4. Spatial Pulse shaping is optional. In case no spatial shaping is done, M2 should be <1.1 5. Regular maintenance every 1000 hours performed either by the vendor or SLAC/LCLS is permitted. 6. The vendor should provide information on the reliability of their laser system based upon customer experience.

7. Request for Proposal (Details 1) • Drive Laser will be a fully purchased and integrated system from the single vendor • Optical transport, launch system, and diagnostics to be built by SLAC • Integration and Delivery • Full Integration and testing at the vendor’s site • Installation and check out at SLAC • Delivery date approximately one year after the award

8. Request for Proposal (Details 2) • Specifications and Technical Approach • MOPA system using CPA scheme • Oscillator is synchronized to an external RF source • Harmonic Generation • Pulse Shaping techniques (Temporal and optional Spatial) with adaptive component determined by the vendor • Cryogenic cooling of the power amplifier crystal

9. Request for Proposal (Details 3) • Other System Requirements • IR beam for the Laser Heater • Remote operation and monitoring • Control system compatible with the rest of the LCLS controls (EPICS) • Machine protection features • Possibilities for upgrade

10. Request for Proposal (Details 4) • Proposal Requirements and Details • Development plan for the high risk components • Subcontract components are permitted, Integration by the vendor • Proposal includes schedule and milestones • Includes critical spares list and test schedule • Warranties and Service Contracts • Preventive Maintenance by the vendor

11. UV Launch System Steering Stabilization Flattener Spatial Shaper Launch Grating Cathode Window Cathode Window Telescope lenses Telescope lenses Grating and Trimmer

12. Launch System Layout

13. Spatial Beam Shaping Newport Refractive Beam Shaper Two aspheric lenses Input Beam Output Beam

14. -3 x 10 6 4 2 0 50 100 150 200 Spatial Profile Flattening of Ultraviolet Laser Pulses with Aspheric Refractive OpticsB.F. Murphy, P.R. Bolton, A. Brachmann, J.F. Schmerge The results of using the IBM refractive aspheric beam shaper at the output of the GTF laser (2psec, 263nm, 500μJ) 0.03 0.02 0.01 0 40 60 80 Input Output 0.02 0.015 0.01 0.005 0 20 40 60 80 100 120 140

15. Imaging of the Spatially Shaped Beam Preliminary Optical Design (ZEMAX) Input of the Beam Shaper Illumination on the Cathode

16. UV Conversion of the Temporally Shaped Pulses Modified SNLO code provided by Arlee Smith (Sandia National Lab) THG in BBO (0.2mm) Output Efficiency 26% InputBandwidth 12nm E400nm=4.4mJ E800nm=2.2mJ 266nm

17. UV Conversion of the Broadband Temporally Shaped Pulses Modified SNLO code provided by Arlee Smith (Sandia National Lab) THG in BBO (0.1mm) Output Efficiency 15% InputBandwidth 12nm E400nm=4.4mJ E800nm=2.2mJ 266nm 266nm

18. BNL/SLAC/INFN Laser Pulse ShapingExperiment at BNL/DUVFEL

19. Dazzler - FastLite Inc. acousto-optic dispersive filter (P. Tournois et al.) TeO2 crystal acoustic wave (computer programmable) - spectral amplitude - temporal phase Dazzler in DUVFEL Drive Laser Courtesy of Yuzhen Shen, Carlo Vicario, B. Sheehy, XJ Wang

20. DUVFEL Drive Laser Layout with Dazzler Courtesy of B. Sheehy

21. Laser Pulse Shaping Without Amplification Before Stretcher After Stretcher Courtesy of Yuzhen Shen, Carlo Vicario, B. Sheehy, XJ Wang

22. Preliminary Laser Shaping Results Courtesy of Yuzhen Shen, Carlo Vicario, B. Sheehy, XJ Wang

23. Specifications for the X-Ray Endstation Lasers

24. Summary and Conclusions • S20 drive laser facility requirements defined • Title II facility design started • Drive Laser (DL) Technical Review Committee created • 1st meeting July 21, 2004 • RFP written & procurement process established: • DL Technical Review Committee (advises) • DL Evaluation Committee (selects) • DL effort consists of three elements: • Vendor supplies DL including shaping & UV conversion • LCLS provides launch & conditioning system • LCLS performs shaping & UV conversion R&D with other labs (BNL, LLNL…) • Preliminary studies indicate difficulty converting shaped pulses • Preliminary Specs for X-Ray Endstation Lasers