Log entry time 17:58:08 on September 12, 2009

Entry number 289262

Run Plan

1. Take production data! Watch the lumi widths to see if anything changes. Please check the histograms on the online data monitor with the reference ones on the shift how-to page (http://hallaweb.jlab.org/experiment/HAPPEX/opmanual/opmanual.html#HPXStartingonlineanalysis).
2. Take Compton data. Alexandre will start looking at the electron detector signals. People will also take a look at the Compton data from this morning, where we had both photon and electron data.
3. Change the half-wave plate state when we get to 1M good pairs. Follow the instructions for doing this and running the flipper script here: http://hallaweb.jlab.org/experiment/HAPPEX/opmanual/opmanual.html#ChangingHalfWavePlate

Concerns

• Keep a close eye on the lumi widths as we take data.
• Please make sure that the shift checklist is done once each shift.