Minutes-5-29-2014

May 29, 2014 FDC+CDC meeting

Agenda

1. Gas system gas panel
2. DAQ (Beni)
3. CDC status (Mike)
4. Engineering (Bill)
5. Electronics (Chris, Nick)
6. FDC alignment [1] (Lubomir)
7. Other

Instructions for Bluejeans meeting connection

FDC meeting ID: 290664653

Minutes

Participants: Curtis, Naomi (CMU), Eugene, Bill, Dave, Chris, Nick, Simon, Fernando, Mike, and Lubomir (JLab).

Gas system

- Both CDC and FDC are now connected to the gas system. Some minor issues (like tube/cable swapping, gas settings) were resolved. FDC bubbles at 50 sccpm per package but now we are flushing it with 100 sccpm (nominal is 200 sccpm per package). CDC is being flushed with 1l/m (nominal 3l/m).

- We were having problems with the gas control panel for the FDC: the display would disappear and then it requires turning off/on the power several times to reappear and some of the settings may be wrong. We are also not sure the

- It turned the FDC part, including the mixing tank, were flushed over the weekend with 60/40 Ar/CO2 gas mixture, instead of 40/60. On Tuesday/Wednesday the detector was also flushed with the wrong gas mixture and as a result there were HV trips at that time.