I created a channel for feedback to slow DC to the laser head. The servo will be done digitally using a perl script similar to what we have for the vacuum can.

There are unused channels for temperature monitor, so I modify them for FAST MON instead.

In the database file "cavities.db" in the sun machine, I changed [C3:PSL-BOX_SENS1] to [C3:PSL-ACAV_FMON]. For input +/- 10 V.

The next thing is to create perl scripts for the servos. Then find an output channel for feeding back to the laser.

 I made an medm screen for controlling the slow feedback signals to both lasers.

 Channels that will be created are:

input

• C3:PSL-ACAV_FMON

soft channels

• C3:PSL-ACAV_PID_KP
• C3:PSL-ACAV_PID_KI
• C3:PSL-ACAV_PID_KD

 output

• C3:PSL-ACAV_SLOWOUT