Injector Drive Laser Update Sasha Gilevich, Dave Dowell FAC Review, October 12, 2004
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Transcript of Injector Drive Laser Update Sasha Gilevich, Dave Dowell FAC Review, October 12, 2004
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
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
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Transport Tube
UV Launch and Condition.
Laser Heater
Drive Laser
RF Gun
Laser Bay
Photocathode Gun & Launch System
Laser Heater
Transport Tubes
Electron Diagnostic
Sector 20 Alcove
Sector 20
Drive Laser System
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Layout of Laser Room at S20
2 3 2 4 2 5 2 6 2 7 2 8 29 3 23 13 0
6 / 1 5 /0 4 V e rs io n
4 'x 6 '
6 'x 1 5 '6 'x 1 5 '
3210M e t e rs
I N C H E S1 0 08 06 04 02 00 P20-17P20-16
FRONT
3'-6"
FRONT
P20-15P20-14
MODULATORSTA 20-8(EXISTING)
KLYSTRON
CONTROLS RACK (EXISTING)
RF CONTROL RACKS (NEW)
LKG-01LKG-02
LKG-03LKG-04
LKG-05LKG-06
FRONT
I&C CONTROL RACKS (NEW)
LKG-07LKG-08
LKG-09LKG-10
LKG-11LKG-12
LKG-13LKG-14
LKG-15LKG-16
LKG-17LKG-18
LKG-19LKG=20
LKG-21LKG-22
LKG-23LKG-24
6' 8"
5'-1
1"
2'-4
"
20'-0"
14'-0
"
General Purpose4plex outlet
3phase/208V
N Laser Power PanelSee Table I
Laser BayControlled Entry
Injector VaultControlled Entry
Laser BayStorage & LocalControl Area
Load LockRoom LKA-04
LKA-05
LKA-02LKA-03
LKA-01
LKA-00
Control Rack (typ)
Power Supply & Control RacksRF Hut
LaminarFlow Hood
NitrogenGasBottles
Laser PowerPanel #1
Laser PowerPanel #2
•Space & Utilities for 2 Drive Lasers
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Drive Laser Procurement Process
Write 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)
Drive Laser Evaluation Committee Ranks
Proposals
Submit RFP to Vendors
Selected Vendors Present ProposalsTo Evaluation &
Technical Committees
Evaluation Committee Selects Vendor & Awards
Contract
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
UV Pulse SpecificationsParameter System Requirement Operating Range/ Comments
Pulse repetition rate 120 Hz Operating rates of 1, 10, 30, 60 and 120 Hz
Pulse Energy 2.5 mJ at 255nm Continuously adjustable from 0.1 to 2.5 mJ
Central Wavelength1 255 nm 252-258 nm
Pulse-to-pulse energy jitter
2.5 mJ at 255nm (see Fig.2),
Less than 2%(rms) variation
Pulse timing jitter2 <200 fs (rms), for frequencies>0.1Hz
Temporal pulse shape3 Uniform, flat top, selected slope on flat-top within 3% of goal, and <8% peak-to-peak over flattop, 1 ps rise and fall at 10% to 90%
10% to +20% slope
Pulse length 10 ps (fwhm) 5 to 20 ps1. Longer wavelength is acceptable, but requires higher energy due to the reduction in cathode QE2. Measured with respect to the 119 MHz clock – RF signal3. 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
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
UV Pulse Specifications
Parameter System Requirement Operating Range/ Comments
Radial shape4 Uniform, flat top, <10% peak-to-peak variation within flattop plateau for any single pulse)
Centroid Position Stability
Less than 3% of the beam radius (1/e2 level) Measured at the laser output plane
Pointing Stability Less than 25μrad Measured at the laser output plane
MTBF5,6 >5000 hours
4. Spatial Pulse shaping is optional. In case no spatial shaping is done, M2 should be <1.15. 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.
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
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 DeliveryFull Integration and testing at the vendor’s site
Installation and check out at SLAC
Delivery date approximately one year after the award
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Request for Proposal (Details 2)
Specifications and Technical ApproachMOPA 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
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
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
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
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
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
UV Launch System
Spatial Shaper Launch Grating
Telescope lenses
Cathode Window
Flattener
Steering Stabilization
Telescope lensesCathode Window
Grating and Trimmer
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Launch System Layout
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Spatial Beam Shaping
Newport Refractive Beam Shaper Two aspheric lenses
Input Beam Output Beam
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Spatial Profile Flattening of Ultraviolet Laser Pulses with Aspheric Refractive Optics
B.F. Murphy, P.R. Bolton, A. Brachmann, J.F. Schmerge
50 100 150 2000
2
4
6x 10
-3
The results of using the IBM refractive aspheric beam shaper at the output of the GTF laser (2psec, 263nm, 500μJ)
InputOutput
20 40 60 80 100 120 1400
0.005
0.01
0.015
0.02
40 60 800
0.01
0.02
0.03
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Imaging of the Spatially Shaped BeamPreliminary Optical Design (ZEMAX)
Illumination on the Cathode
Input of the Beam Shaper
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
UV Conversion of the Temporally Shaped Pulses
THG in BBO (0.2mm)
Input Bandwidth 12nm
E400nm=4.4mJ E800nm=2.2mJ
Output
Efficiency 26%
266nm
Modified SNLO code provided by Arlee Smith (Sandia National Lab)
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
UV Conversion of the Broadband Temporally Shaped Pulses
THG in BBO (0.1mm)
Input Bandwidth 12nm
E400nm=4.4mJ E800nm=2.2mJ
Output
Efficiency 15%
266nm
Modified SNLO code provided by Arlee Smith (Sandia National Lab)
266nm
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
BNL/SLAC/INFN Laser Pulse ShapingExperiment at BNL/DUVFEL
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Dazzler - FastLite Inc.acousto-optic dispersive filter
(P. Tournois et al.)
acoustic wave (computer programmable) - spectral amplitude - temporal phase
TeO2 crystal
Dazzler in DUVFEL Drive Laser
Courtesy of Yuzhen Shen, Carlo Vicario, B. Sheehy, XJ Wang
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
DUVFEL Drive Laser Layout with Dazzler
Millennia Laser
Tsunami Laser
Spec
trum
Ana
lyze
r
Aut
o-co
rrel
ator
OpticalIsolator
StretcherCompressor 1
Regenerative Amplifier
2-pass Amplifier
2-pass Amplifier
VariablePowerDivider
Phot
ocat
hode
GC
R-1
70 Y
AG
Las
er
GC
R-1
50 Y
AG
Las
er
Photodiode
Pow
erA
tten
Autocor-rellator
SpotImaging
Power Mon
Optical Relay, 14 meters
Monument
PowerAtten
SpatialFilter
Compressor 2
Optical Relay, ~35 metersSeedingAnd Diagnostics
Daz
zler
Millennia Laser
Tsunami Laser
Spec
trum
Ana
lyze
r
Aut
o-co
rrel
ator
OpticalIsolator
StretcherCompressor 1
Regenerative Amplifier
2-pass Amplifier
2-pass Amplifier
VariablePowerDivider
Phot
ocat
hode
GC
R-1
70 Y
AG
Las
er
GC
R-1
50 Y
AG
Las
er
Photodiode
Pow
erA
tten
Autocor-rellator
SpotImaging
Power Mon
Optical Relay, 14 meters
Monument
PowerAtten
SpatialFilterSpatialFilter
Compressor 2
Optical Relay, ~35 metersSeedingAnd Diagnostics
Daz
zler
Courtesy of B. Sheehy
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Laser Pulse Shaping Without Amplification
Courtesy of Yuzhen Shen, Carlo Vicario, B. Sheehy, XJ Wang
Before Stretcher After Stretcher
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Preliminary Laser Shaping Results
Ti:Sapph Oscillator
Dazzler
Stretcher
Amplifier
Compressor
tripler
800 nm9 nJ100 fsec
5 nJ200-400 psec
25 mJ170-350 psec
15 mJ0.1 - 30 psec
266 nm1.8 mJ
temporal
risetime: 20-80% 2.5 psec10%-90% 4 psec
12.3 psec FWHM
Ti:Sapph OscillatorTi:Sapph Oscillator
DazzlerDazzler
StretcherStretcher
AmplifierAmplifier
CompressorCompressor
tripler tripler
800 nm9 nJ100 fsec
5 nJ200-400 psec
25 mJ170-350 psec
15 mJ0.1 - 30 psec
266 nm1.8 mJ
temporaltemporal
risetime: 20-80% 2.5 psec10%-90% 4 psec
12.3 psec FWHM
Courtesy of Yuzhen Shen, Carlo Vicario, B. Sheehy, XJ Wang
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Specifications for the X-Ray Endstation Lasers
Parameter Nominal Spec
Pulse Length 30fs
Wavelength 800nm
Repetition Rate 1KHz
Pulse Energy 1mJ
Dave Dowell, Sasha GilevichFacilities Advisory Committee
October 12 2004Injector Drive Laser Update
Summary and ConclusionsS20 drive laser facility requirements definedTitle II facility design startedDrive 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 conversionLCLS provides launch & conditioning systemLCLS performs shaping & UV conversion R&D with other labs (BNL, LLNL…)
Preliminary studies indicate difficulty converting shaped pulsesPreliminary Specs for X-Ray Endstation Lasers