Transcript Drive Laser and Hand-Over to Operations

Drive Laser Status and Hand-Off to
Operations
•The Plan – Observe and adjust
•Interface with Ops
•Implementation
•Results - Future
June 17, 2008
Drive Laser Status and Hand-Off to Operations
1
Bill White
[email protected]
Commissioning run 1
Learned
Laser pointing effects profile
Energy adjustment in tripler effects profile
Stage has limited lifetime with feedback
Fused silica losses and lifetime issues
Transport window contamination and lifetime
Don’t need pointing loop around tubes
June 17, 2008
Drive Laser Status and Hand-Off to Operations
2
Bill White
[email protected]
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.
June 17, 2008
Drive Laser Status and Hand-Off to Operations
3
Bill White
[email protected]
Implementation – Laser pointing lock
June 17, 2008
Drive Laser Status and Hand-Off to Operations
4
Bill White
[email protected]
Implementation – Energy measurement
June 17, 2008
Drive Laser Status and Hand-Off to Operations
5
Bill White
[email protected]
Implementation – Energy adjustment
June 17, 2008
Drive Laser Status and Hand-Off to Operations
6
Bill White
[email protected]
Implementation – Oscillator control
June 17, 2008
Drive Laser Status and Hand-Off to Operations
7
Bill White
[email protected]
Implementation – Spatial size control
June 17, 2008
Drive Laser Status and Hand-Off to Operations
8
Bill White
[email protected]
Implementation – Stability, Safety
June 17, 2008
Drive Laser Status and Hand-Off to Operations
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Bill White
[email protected]
Laser Spatial and Temporal Shaping
2007
2008
2008
2R = 1.4 mm
2007
6.6 ps
7.2 ps
Spatial shape on cathode using iris
June 17, 2008
Drive Laser Status and Hand-Off to Operations
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Temporal shape (6.9 ps FWHM)
Bill White
[email protected]
Results – Adjustable pulse width
June 17, 2008
Drive Laser Status and Hand-Off to Operations
11
Bill White
[email protected]
Results – Stability
June 17, 2008
Drive Laser Status and Hand-Off to Operations
12
Bill White
[email protected]
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
June 17, 2008
Drive Laser Status and Hand-Off to Operations
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Bill White
[email protected]