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User name A. Puckett
Log entry time 16:50:44 on April10,2006
Entry number 170226
keyword=quad mismatch in Hall A beamline
There was a problem near the end of Compton run 13349, unfortunately it's too late to get a screen capture, but what I observed was that the Compton electron rate was very high, about 180 kHz/muA, and the photon and coincidence rate was nil. So I looked at the beam position monitor, and it had drifted far off from the set values, so I called MCC and they fixed the problem, they said there was a mismatch in one of the quads in the Hall A beamline. I cycled the Compton, GEn, and parity runs, and everything looks OK now.