The Run Coordinator and the experiment spokespeople may want to consider alternatives to using a low ramp rate to try to prevent trips. I'm not sure it is actually helping. It may just be a coincidence that it appears to help. I suggest trying a slightly lower beam current, e.g. 13.5 uA or 13 uA. Sacrificing 1/14 of the beam current, if it improves the efficiency by more than 1/14, will be worth it.
Also, note that when I asked MCC to lower the ramp rate back to .25 uA/s,
the operator mentioned that he was "bringing us up manually" because
using the "lock" (current lock?) would have brought us up much faster.
However, he mentioned that the last few trips (both of which had caused
the BB WCs to trip) had both been caused by the FSD of the Hall A ion
chambers. He also mentioned that bringing up our hall manually could be
affecting the quality of our beam orbit.
A copy of this log entry has been emailed to: xqian@jlab.org, rsubedi@jlab.org