Target chamber nozzle tjitter

The experiment on Saturday, there was a big jitter in the trigger pulses. I found somebody removed the control signal cable for SDG II, which is used to remotely control the repetition rate. This rate will be divided and sent to the Prometheus and the target chamber, so it's better to be fixed when real shooting. The resent divider was set on 126, which consequently sent out ~4.0Hz to the following triggers. After fixing the repetition rate, it's easy to synchronize the nozzle triggers with the laser pulses.