Bunch number control - SA3 FEL imager

As announced today in the XO meeting the SA3 FEL imager has a new feature, see screenshot, encircled:
- In case of danger for the YAG screen the bunches SA3 are set to "0" via the BunchPatternServer (SA3 Main scene).

What to do:
- Choose a different screen, BN or CBor, and again set the number of bunches needed.
- If operation with the YAG screen is wished reduce the pulse energy at the screen.

Further info:
- In general, danger to the YAG screen, even in single bunch operation, is avoided if the GATT is operated at <10% transmission. Observe the screen Watchdogs.
- This feature is installed at the SA3 FEL imager only, after new recent damages.
- Activate the device with "Start", deactivate the control with "Stop Monitoring".

In case of not-correct behaviour inform the PRC (Andreas Galler this week) or me.
This entry is copied to the ttfinfo logbook.