We turn on Recoil detector, to use it as a monitor for target overlap.

MCP front -2500 V for highest signal rate. 
(Used to be -2250 V during previous beam time.)

DAQ triggered with 1 kHz clock in 2nd trigger input.
(2nd trigger used to be x-rays in previous beam time.)

The picture shows the increase of the Recoil rate when increasing the voltage from 2250 V to 2500 V in steps of 50 V. The last shot was taken without beam, so just target on.