Difference between revisions of "Minutes-6-5-2014"

From GlueXWiki
Jump to: navigation, search
Line 22: Line 22:
 
= Minutes =
 
= Minutes =
  
−
Participants: Curtis, Naomi (CMU), Eugene, Bill, Dave, Chris, Nick, Simon, Fernando, Mike, and Lubomir (JLab).
+
Participants: Curtis (CMU), Bill, Beni, Chris, Nick, Simon, Fernando, and Lubomir (JLab).
  
 
== Gas system ==
 
== 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). From the gas GUI for experts (attached) we see the pressures in the individual cells within a FDC package are very similar. Bill is surprised and requested testing at different scanning times. When all the solenoid valves are closed the pressure sensor reads high pressure that increases; could be explained by heat flow.  
+
- There were several problems in the FDC parts of the gas system. A series of graphs (from Mike) linked above demonstrate some of them. A 1 l/min leak was found due to bad fitting of one of the valves: first graph shows the pressure in the mixing tank (red is FDC) with ~2 l/min filling flow and 0.4l/m FDC usage.
  
 
- 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 if it is only display problem or also the gas flow is disrupted. Maybe related to that: we need to fill the mixing tank with a flow that is a factor of 2 bigger than what is expected from the FDC usage. We need a spare control panel (Eugene requested a price estimate).  
 
- 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 if it is only display problem or also the gas flow is disrupted. Maybe related to that: we need to fill the mixing tank with a flow that is a factor of 2 bigger than what is expected from the FDC usage. We need a spare control panel (Eugene requested a price estimate).  

Revision as of 15:44, 5 June 2014

June 5, 2014 FDC+CDC meeting

Agenda

  1. Gas system [1], [2], [3], [4], [5], Mike's gas GUI
  2. DAQ (Beni)
  3. CDC status (Mike)
  4. Engineering (Bill)
    • cathode measurements [6]
  5. Electronics (Chris, Nick)
  6. Instructions for shift workers (Beni, Lubomir)
  7. FDC alignment [7] (Lubomir)
  8. FDC pedestal resolution: media:pedestal_resolution.pdf
  9. Other

Instructions for Bluejeans meeting connection

FDC meeting ID: 290664653


Retrieved from "https://halldweb1.jlab.org/wiki/index.php?title=Minutes-6-5-2014&oldid=57743"