We had 1.5 hours of useful beam out of the last 24 hours. This report should be very short. Owl shift was able to start and complete one of the two halo monitor test plans, halo target survey, in the last hour and a half of the shift (g0log 71280). There was intermittent beam Sunday swing but nothing long enough to construct a useful program out of. This was the second night in a row that MCC had problems with CARMS and CANS and other odd acronyms failing. Indications are it is due to a faulty breaker in the counting house that was fixed on day shift during the long down to fix the Hall C chopper slit. As of the time of writing this report, 22:10 EST, beam had not been established in the hall.
During the long access Sunday day it was discovered that the fly swatter target could no longer be inserted. The target expert was able to insert it once but it immediately fell out and repeated attempts to reinsert it failed. This morning the Hall C engineering staff, the flyswatter designers, went into the hall to troubleshoot. They were able to ascertain that the problem was not on the air side of the flyswatter knob, but on the vacuum side. It is not clear if the problem is in the knob or 2 meters downstream on the apparatus inside the magnet cryostat. In any case, since it is on the vacuum side any attempt at a repair will require the magnet to be warmed up to at least LN2 temperatures. Our background experts are/should be looking at the data we have taken on LH2+FS, radiator+FS, and LH2 and thinking about what we can learn without the flyswatter.
We will spend the next couple of days taking long runs on LH2 for two reasons: to test beam feedback and get asymmetry statistics comparable to what we had from the engineering run. In this way we can get useful beam development data and assess where we are in terms of background.