Use Case:  Stabilize Light Source

Description:  Perform Laser Light Source Stabilization in Frequency

Role(s)/Actor(s): 
Primary: PRIMA Metrology Control System
Secondary: Light Source Stabilization sub-system

Priority: Critical

Performance: Duty cycle < 20%

Frequency: >1Hz

Preconditions: 

• Light Source Stabilization sub-system is ONLINE

Basic Course: 

• Enter the control loop
  • Read Error Signal
  • Compute frequency set points for the Laser Controller
  • Set Laser Cavity Temperature
  • Set Laser Piezo Voltage

Alternate Course: 

• Terminate the control loop

Postconditions: 

• The Light Source Stabilization sub-system is regulating at requested frequency

Issues to be Determined or Resolved:  Regulation law (from external contractor of the Laser Assembly)

Notes:

Last modified: Wed Feb 26 09:22:55 MET 2003