Present: A. Camsonne, C. Hyde, C. Munoz-Camacho, J. Roche, V. Sulkosky.

• Report on the recent meeting with Cynthia
  Charles and Alexandre C. met with her. Very positive meeting but her follow up is confusing. It looks like she is still trying to push the GMP to be on the floor at the same time as us. PREX is not at the front of the schedule anymore (money, beam quality, etc..) but that might change, it is not clear how that collaboration will react. It is also not very clear why she is trying to get the two experiments on the floor at the same time. It is not clear if we are going to run in one or two periods. No explicit discussion about the state of beam line instrumention at the beginning, but Moeller should be with the old warm magnet still. Did not talk when we will be taken off the floor, or what will be the efficiency scheduling, the first priority was to get on the floor.
  The GMP people are : Bogdan, Shalev, J. Arrington. The proposal is there: http://www.jlab.org/exp_prog/proposals/07/PR12-07-108.pdf It is a one arm experiment that wants to use the two HRS simultaneously, they also want high current.
• Space issue for DVCS3
  Charles vonlunteered the space at ODU and let Cynthia knows about that. For memory our dark box and and cable tray got moved out of the EFD building into Hall A: space is still a very high commodity at JLab. Carlos is basically ok but concerned about last minute mechanical issues. Charles is more concerned about DAQ support. If we work for a while at ODU, we will probably have to do an assembly at JLab before the final assembly in the hall (why?? I did not get that).
• DVCS2 analysis:
  • 5 kinematics out of 8 have been replayed: one more than last week. Malek is working on timing corrections after each report. Final ntuples by september at JLab. It takes time to do this first pass, it is not only an issue of CPU but also of man-power.
  • Simulation: Last week we discussed the large effect of the resolution is twice worst if the photon falls in betwen the block than if the photon fall within the block. This was traced back to the number of blocs considered in the clustering: if the eneryg in one block is too low then that block is not considered to find the locus of the hit. This results in a bad resolution for in between-blocks photons. The simulation threshold has been lowered from 1 GeV to 100 MeV, in that situation the resolution for in-between-blocks photons is only 30% worst than in-blocks photons. Is this a real life effect? Well maybe in DVCS1 because of the trigger on the electron. In DVCS2, that should not be an issue but in time we will have to match the clustering trigger between the simulation and the data analysis. The first pass analysis (right now being done at Lyon) is doing wave form analysis, the threshold for looking for a pulse is 20 MeV, so lower than the clustering threshold .