Difference between revisions of "Minutes-2-27-2014"
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# Installation status [http://www.jlab.org/Hall-D/detector/fdc/installation/FDCinst02272014_1.JPG] | # Installation status [http://www.jlab.org/Hall-D/detector/fdc/installation/FDCinst02272014_1.JPG] | ||
# Engineering (Bill, Dave) | # Engineering (Bill, Dave) | ||
| − | ## Cathode scan | + | ## [http://www.jlab.org/Hall-D/detector/fdc/calibration/FDC_Cathode_strip_measurement.xlsx Cathode scan] |
## LV fast shutdown | ## LV fast shutdown | ||
# Electronics [http://www.jlab.org/Hall-D/detector/fdc/installation/Tests_Feb_2014.xlsx problematic channels] (Fernando, Chris, Nick) | # Electronics [http://www.jlab.org/Hall-D/detector/fdc/installation/Tests_Feb_2014.xlsx problematic channels] (Fernando, Chris, Nick) | ||
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== Installation == | == Installation == | ||
| − | - A cable holder frame has been installed at the top on face of the magnet (picture attached). It's too far from the mesh and the cables will sag (Nick), but better than before. We may need such frames also on the sides. Tom is working on the cable cradle | + | - A cable holder frame has been installed at the top on face of the magnet (picture attached). It's too far from the mesh and the cables will sag (Nick), but better than before. We may need such frames also on the sides. New cable tray will be installed on the right side of the magnet to avoid crossing of the BCAL water pipes. Tom is working on the cable cradle that will slide together with the FDC on bearings (Bill). Bill is manufacturing the FDC-to-mesh connections made of metal and plastic to insulate the two. We also have to cut the mesh loop. Need to have also caps for the Fluorinert tubes to be used when the cooling system is disconnected from the FDC. |
| − | - | + | - Yesterday Lubomir replaced the mass flow controller (6000 sccpm range) of the temporary gas system with a re-calibrated one of 500 sccpm. It turned out that to have the same flow on the rotameter we had to set the flow at 200 sccpm or less, to be compared to setting of the previous flow controller of 400sccpm. It turned out also that gas bottle pressure goes down slower than before, but we need more days to figure this out. If this is the case then the old flow controller was leaky, but at the same time it is strange that we are flushing now successfully all the four packages with 200sccpm total; normally we needed such a flow for one package only. |
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| − | + | ||
== Engineering == | == Engineering == | ||
| − | - Bill | + | - Bill returned from Hexagon Metrology, Charlotte, NC, and showed us |
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| − | + | ||
- Dave started working on the hardware shut off of the LV crate from the chiller. He needs to identify how exactly to interpret the signals about the chiller status and then will figure out with Fernando what the PCB should be doing. The board can be mounted on the same rack (back side) where the LV crate is. As for the MPOD controller settings Dave will talk to Hovanes. | - Dave started working on the hardware shut off of the LV crate from the chiller. He needs to identify how exactly to interpret the signals about the chiller status and then will figure out with Fernando what the PCB should be doing. The board can be mounted on the same rack (back side) where the LV crate is. As for the MPOD controller settings Dave will talk to Hovanes. | ||
Revision as of 18:41, 27 February 2014
February 27, 2014 FDC meeting
Agenda
- Installation status [1]
- Engineering (Bill, Dave)
- Cathode scan
- LV fast shutdown
- Electronics problematic channels (Fernando, Chris, Nick)
- Mini-DAQ status FDC E-log (Beni)
- Other
![[1]](http://www.jlab.org/Hall-D/detector/fdc/installation/FDCinst02272014_1.JPG){kind=link}