March 13, 2019 online meeting minutes

present: Sergey Boyarinov, Eugene Pasyuk, Stepan, Ben, Nathan, Raffaella, vpk

1. RG-A run preparations

• RG-A starts March 19 or 20 with few hours switch time

• target will be changed from D2 to H2, probably around midnight from 19 to 20 of March, plan will be discussed

• no other configuration changes expected expect trigger

• trigger for RGA: restore fall conditions: 3 triggers with FTCAL, HODO, CTOF; and probably add CND geometrically matched with CTOF

• all fiber required connected already, or will be connected in next downtime before March 19, no other hardware changes are required

• firmware change is required to central SSP only where CTOF and CND will be connected by fibers, Ben will change firmware and Andrea will prepare recommendations for CTOFxCND coincidence and decide later, initially CND will be in tagging mode

• Ben and Valery will prepare trigger file(s) for RG-A

• for RG-A and also for current RG-B, special trigger file will be prepared for running from Faraday Cap with beam blocker removed; beam will be 20min run 50nA with 2 or 4 rescale factor, then several hours 10nA without prescale

2. HPS run work

• June 17 run starts

• GTP diagnostic will be moved to VTP, scalers will be inside VTP instead of eternal DSC2, ActiveMQ will be used

• have to make sure ECAL signals does not exceed 2V FADC range; will be 4GeV this time and probably 6GeV in future