Drive Laser Status and Hand-Off to Operations

1. Drive Laser Status and Hand-Off to Operations The Plan – Observe and adjust Interface with Ops Implementation Results - Future

2. Commissioning run 1 • Learned • Laser pointing effects profile • Energy adjustment in tripler effects profileStage has limited lifetime with feedback • Fused silica losses and lifetime issues • Transport window contamination and lifetime • Don’t need pointing loop around tubes

3. Interface with Operations • Normal Operations: The daily operation of the laser which, with the new transport system and oscillator, will be controlled from MCC. This will be the responsibility of the Accelerator Operations Department. Training of the operators, documented operating procedures as appropriate, and support during the transition will be the responsibility of the Laser Group. Operating procedures and documentation must conform to the document control policies of the Accelerator Operations Department. The Laser Group is responsible for ensuring that engineered protection systems are in place to ensure the safety of personnel and the protection of the equipment.  • Daily or Shift-wise Parameter Logging: The Laser Group is responsible for developing control-system based facilities and software to monitor and record laser parameters as needed to support the efficient operation and maintenance of the laser systems. These facilities will function automatically as much as possible; however, some logging activities may require operator intervention on a daily or shift-by-shift basis. The Accelerator Operations Department staff will work with the Laser Group to develop efficient ways to achieve this.  • Scheduled Maintenance: Maintenance of the laser and associated equipment will be the responsibility of the Laser Group who will work with the Accelerator Operations Department to develop policies and procedures that work for both groups, within the established ASD framework for coordinating accelerator maintenance activities.  • Unscheduled Problems: This will be the responsibility of the Laser Group who will designate someone on call during commissioning shifts. The Laser Group will also provide the Accelerator Operations Department with a pager number and/or call list to expedite contact with a qualified laser person when a problem arises whenever the laser systems are scheduled to be operated. The information will be provided in the form of one or more pages that can be incorporated directly into the ASD Call-In Lists binder.

4. Implementation – Laser pointing lock

5. Implementation – Energy measurement

6. Implementation – Energy adjustment

7. Implementation – Oscillator control

8. Implementation – Spatial size control

9. Implementation – Stability, Safety

10. 6.9 ps 2008 7.2 ps 2R = 1.4 mm 2008 7.2 ps Laser Spatial and Temporal Shaping 2007 2007 Temporal shape (6.9 ps FWHM) Spatial shape on cathode using iris

11. Results – Adjustable pulse width

12. Results – Stability

13. Results - Future • So far >99.9% scheduled uptime • Operators log data • We analyze the data to find components that need attention • Plan the repair during scheduled down • Diodes are dying in Jedi 1 • We have data on diode lifetime • Suggests modification that could reduce operational costs