Minutes-7-3-2014

July 3, 2014 FDC+CDC meeting

Agenda

1. Commissioning plans
   • Wiki Page
2. Gas system
3. DAQ (Beni)
4. CDC status (Beni)
5. FDC status (Lubomir)
6. Electronics (Chris, Nick)
7. Engineering (Bill)
8. Other

Instructions for Bluejeans meeting connection

FDC meeting ID: 290664653

Minutes

Participants: Naomi (CMU), Beni, Dave, Chris, Mike, Simon, Fernando, Eugene, Glenn, and Lubomir (JLab).

Readiness review

- Drafts (very preliminary) for the CDC and FDC commissioning were prepared for the readiness review (page linked above). For the FDC the plan so far is to use two gas mixtures, 90/10 and 40/60, the first one is better for the alignment. The target position(s) and turning on/off the magnetic field needs to be coordinated.

Gas system

- Last Friday, at ~8am, the power in the gas room was turned off for ~15 min due to a planned electrical work there. After turning it ON, the setting in the gas control panel were wrong (40mA, while the range is 4-20mA). As a result: (1) the flow was doubled and (2) the PLS didn't turned OFF the flow controllers when the mixing tanks reached 12psi. Soon the pressure reached 15psi and the two relief valves were continuously engaged for some time.

- After the meeting we installed an UPS (in preparation for the holiday weekend) there. Dave will contact the company to find a solution, at least to change the default settings to what we need.