Sasha Gilevich Facilities Advisory Committee [email protected] d.edu April 7 2005 Injector Drive Laser Update Injector Drive Laser Update Facilities Advisory Committee Meeting April 7, 2005 •Project Status •Drive Laser Procurement •R&D •Launch System Design
Injector Drive Laser Update
Feb 12, 2016
Injector Drive Laser Update. Project Status Drive Laser Procurement R&D Launch System Design. Facilities Advisory Committee Meeting April 7, 2005. Project Status. Design of the S20 drive laser facility is underway. Bids are due from general contractors on April 14th - PowerPoint PPT Presentation
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Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Injector Drive Laser UpdateFacilities Advisory Committee Meeting
April 7, 2005
•Project Status•Drive Laser Procurement•R&D •Launch System Design
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Project Status
Design of the S20 drive laser facility is underway. Bids are due from general contractors on April 14thThe vendor for the Drive Laser is selected. Purchasing is working on the award of the contract.Basic design of the transport tubes done; drawings submitted for the quote. Shielding should be approved by radiation physics. Design of the Launch and Conditioning System is near completionR&D effort is defined and started. BCR is approved
LCLS performs shaping & UV conversion R&D with other labs (LLNL, ANL)BNL temporal shaping work with Dazzler completed
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Drive Laser Procurement ProcessWrite Request for
Information(RFI)
Drive Laser Technical Review
July 21, 2004
Evaluate RFI & Technical Review Responses
Write Request for Proposal (RFP)
Write & Approve Advance Procurement Plan
(APP)
Submit RFP to Vendors
SLAC Awards Contract
Evaluation Committee
Selects Vendor
Evaluation & Technical
Committees Review the Proposals
Evaluation Committee Ranks the Proposals
Site Visit
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Drive Laser ProcurementResponding to the RFP 5 Companies submitted the proposals
Toptica Photonics
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Drive Laser ProposalsOnly Thales signed to meet all the specsThales sold high energy IR system with the DazzlerKM Labs and Femtolasers manufacture oscillatorsThales and Coherent manufacture DPSS pump lasersKM labs proposed 1KHz system Cryo cooling of the final amplifier (Coherent, KM labs, Amplitude)Nobody has experience with UV temporal shaping and can guarantee meeting UV temporal shaping specsAmplitude and KM Labs proposed R&D plan for UV temporal shapingTemporal shaping. KM Labs proposed passive optical filtering with LCD modulator, the others - DazzlerOnly Amplitude suggested diagnostics developmentThales and Coherent controls require minimum SLAC integration work
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Drive Laser Vendor Selection
High potential output IR energy (80mJ system at ALLS)Manufacturer of the QCW DPSS pump laser (Jedi) Used Dazzler in several systems (but not for shaping) (ALLS).Proposed configuration can be upgraded to higher energy (up to 50mJ) by adding second Jedi pump. Cryo cooling is not needed, but can be added Aberration-free stretcher (patented). Motorized Provides programmable, multi-channel pulse synchronization unit.Short delivery time (8 months)Thales is a part of a very large French defense contractorControls system is compatible with LCLS requirements
Thales
Strengths
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Drive Laser Vendor Selection
UV shaping part is not developedPossible reliability issues with QCW pump lasers (relatively new product)Warranty on the diodes is for 1-year or 1-billion pulses.Warranty on optics is 3 months No details on special diagnostics – (SLAC streak camera)Non-US companyDistant location
Thales
Weaknesses
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Open Issues
Choice of oscillator. (Femtolasers Femtosource Synergy or the oscillator from KM labs)Controls interfaceOption to use cryo cooling
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Risk Mitigation
Buy additional pump laser Conduct UV shaping R&D (LLNL)Develop special diagnostics (LLNL)
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Laser Beam Shaping Work at LLNL(March – December 2005)
Continue the Dazzler shaping studies to improve the quality and reliability of the UV pulse and to explore other shape types Design a third-harmonic, non-linear optical system with more than 10% IR to UV conversion efficiency which uniformly converts over a 10 nm bandwidth.
ModelingIntegrated model including temporal shaping and UV conversion. Optimize UV conversion efficiencyInvestigate designs which integrate shaping and conversion. In particular, the approach converting to UV with a short pulse and then stretching in the UV to the desired length
ExperimentsIR and blue shapingTest and optimization of the UV conversion. UV shaping
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Laser Diagnostics Effort at LLNL(March – September 2005)
Design, build and test diagnostic systems capable of measuring the IR, blue and UV wavelength-phase correlation (waveform) of the laser beam with better than 100 fs and 0.1 nm resolution. These diagnostics need to make these measurements for pulses as long as 20 ps and should be single-shot.
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
LLNL Work - Summary
Perform R&D on techniques to produce temporally shaped UV pulses suitable for use in the LCLS injector.Design, build and test laser diagnostics.Test cathode launch optics with shaped pulses. Provide (advise on) the beam steering stabilization system, which was developed by LLNL.Support in the Drive Laser integration.
Participate in the technical reviews of vendor’s work.Support integration of shaping into the drive laser
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
ANL WorkUV Conversion and Spatial Shaping
Obtain reference data for conversion efficiency of second and third harmonic of IR laser light from a broadband TiS laser sourceCompare these results to modeling predictions from the SNLO codeAssess the effects of shaping the incident IR transverse profile on the conversion efficiency and transverse profile of the third harmonic (UV) Assess relay imaging of third harmonic light with a transversely shaped (non-Gaussian) profile over an extended transport distance and compare to modeling predictions from the ZEMAX codeEvaluate the performance of a reflective UV diffraction grating with respect to diffraction efficiency, anamorphic profile shaping and tilted amplitude front generation (time slew) and the UV fluence threshold for surface damage
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Launch and Conditioning System Requirements
Grazing incidence at the photocathode (22.5 degrees). Requires time slew compensationUniform spatial shape. Continuous adjustment of the beam diameter on the photocathode
from 0.38 to 2 mm (remotely)Option to steer the beam on the cathode (remotely)
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Launch System Layout Aspheric Refractive Beam Reshaper Diffraction grating for time slew correctionAperture for producing the hard edgeTwo lenses imaging the aperture to the cathodeAdjustable distance between lenses for beam diameter controlInsertable telescope to change the diameter adjustment range (needed because of limited table space)2 mirrors with variable angle on translation stages for beam steeringBeam splitter for diagnostics (virtual cathode concept)
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Layout
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Minimum spacing between lenses
Side – 10mm
Y
X
Beam Profile (ZEMAX modeling. Bandwidth 3nm)
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Beam Profile (ZEMAX modeling. Bandwidth 3nm)
Maximum spacing between lenses
Side – 5mm
Y
X
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Beam Profile with the 3:1 TelescopeMinimum spacing between lenses
Side – 5mm
Y
XX
Y
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Beam Profile with the 3:1 TelescopeMaximum spacing between lenses
Side – 2mm
Y
XX
Y
Sasha GilevichFacilities Advisory Committee
April 7 2005Injector Drive Laser Update
Summary
Drive Laser vendor is selectedR&D work is needed to solve shaping and UV conversion issues
Schedule and budget for LLNL and ANL effort put togetherBCR is approvedWork started
Launch System Optical design is completedDesign allows to meet the required specifications
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