1. Drive-Laser Commissioning Status and Plans
Requirements
Where do we stand today?
Laser Acceptance Status
Laser Commissioning
UV on cathode – Injector Commissioning

2. Gun Design for Normal Incidence
Layout of Laser from Injection Mirror to Cathode
gun solenoid
cathode
laser injection cross
vacuum valve
drawing compliments of R.F. Boyce & T. Osier

3. UV pulse goals
IR to UV conversion efficiency > 10 %, 2.5 mJ 255 nm
nm, < 2% energy stability
120 Hz, MTBF > 5000 hours
Spatial Profile
FWHM = 1.2 – 3.0 mm
Temporal Profile
FWHM = 10 ps
(5-20 ps)
90-10 rise and fall times < 1 ps
flat-top, < 8% peak-to peak

4. Challenges Hardest Temporal Shape UV conversion Spatial Shape 120 Hz
Synchronization
Reliability
Characterization
Transport
Not part of Thales contract

5. Spatial Beam Shaping – Newport Shaper
Converts Gaussian beam input to flat top output
High energy conversion - accepts 99.7% of input energy
High profile uniformity - 78% of input power is directed into the flat top with 15% RMS power variation
Collimated output beam allows use of conventional optics after beam shaping
Provides performance over large wavelength ranges
GBS-UV H

6. Testing of the Newport Shaper
Input beam
Image of the aperture after the shaper
Courtesy of John Castro

7. Transport

8. Active Steering Stabilization
F1=200
F2=120
F3=-150
F4=F5=5000
F6=1500
Layout
Vacuum cell
Zoom L4
Beam shaper L3 L1 L2
Transport tube
Table in the tunnel
Virtual Cathode
Powermeter
Steering system L5
Camera
Polarizer
Photocathode
Waveplate
Shutter
Active Steering Stabilization L6

9. Beam Profile on the Cathode ZEMAX Modeling
Bandwidth 3nm
Beam Radius = 1.56mm
Side - 4mm

10. Where are we now? - Recent Milestones
July 14 – Laser Tables Installed

11. Where are we now? - Recent Milestones
July 21 – Laser Arrives at Sector 20

12. Where are we now? - Recent Milestones
July 24 – Complete system on table

13. Where are we now? - Today Infrastructure Complete Laser Work
Complete LSS
Move laser supplies into rack
Setup streak camera
Setup cross-correlator
Setup UV-FROG
Setup spatial diagnostics
Infrastructure Complete

14. Where are we now? - Today
Streak Camera installed and working

15. Where are we now? - Today
Cross-Correlator working

16. Where are we now? - Today
TG-FROG working

17. This week and next…
Thales working on pulse shape

18. What's Next - Laser Commissioning
LSC Review of Final SOP Oct. 10.
Committee approved SOP with very minor changes
LSS hardware installed and certified Oct. 26
LSO walkthrough Oct. 27
Thales engineer here for next 2 weeks for temporal shaping
As we expected, they are struggling with temporal shaping.
We will be deciding how to proceed during conference calls this and next week.

19. What's Next - Laser Commissioning
LSC Review of Final SOP Oct. 10.
Committee approved SOP with very minor changes
LSS hardware installed and certified Oct. 26
LSO walkthrough Oct. 27
Thales engineer here for next 2 weeks for temporal shaping
As we expected, they are struggling with temporal shaping.
We will be deciding how to proceed during conference calls this and next week.

20. What's Next - Laser Commissioning
Installation of shaping and transport to begin late-Oct or early-Nov
One week down for electrical and cable plant
Spatial shaper is in hand
Pointing stability lock system has been tested and is ready for installation
All other components are in hand
Laser table and LSS in Vault
Laser door installed prior to transport – Nov 20
Components will be installed and tested in laser bay prior to table moving to vault
Support for laser table should be ready for table installation on Nov 28th

21. What's Next - Laser Commissioning
Installation of shaping and transport to begin late-Oct or early-Nov
One week down for electrical and cable plant
Spatial shaper is in hand
Pointing stability lock system has been tested and is ready for installation
All other components are in hand
Laser table and LSS in Vault
Laser door installed prior to transport – Nov 20
Components will be installed and tested in laser bay prior to table moving to vault
Support for laser table should be ready for table installation on Nov 28th

22. What's Next - Laser Commissioning
Virtual cathode work requires GTL.
UV on cathode two weeks after virtual cathode
Laser optimization (temporal profile, stability, etc) will continue until GTL is installed.

23. What's Next - Laser Commissioning
Virtual cathode work requires GTL.
Gun can be installed two weeks after GTL installation
UV on cathode one week later.
Laser optimization (temporal profile, stability, automation, etc) will continue until GTL is installed.

24. End