July 20, 2011 Tracking CDC/FDC
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Meeting Time and Place
Wednesday July 20, 2011 at 11:00am At Jefferson Lab, the meeting will be held in F326
Connections
To connect from the outside, please use ESNET
- ) ESNET: 8542553
- )To connect by telephone, dial:
- You can look up toll-free number at http://www.readytalk.com/intl
- US and Canada: (866)740-1260 (toll free)
- International: (303)248-0285 (toll call)
- enter access code followed by the # sign: 3421244#
Agenda
- Announcements
- FDC Update logbook
- CDC Update
Minutes
Participants: Curtis, Naomi, Beni, Eugene, Mark, Simon, Dave, Tim
FDC Update
- There are some problems with wire planes 1 and 2 not holding HV, not caused by the wires but by the frame where the capacitors are soldered...
- So far 8 cathode planes and 3 wire are frames ready, cannot put them together until the wire dampening/beam blocking material arrives.
- Simon is looking at the benefit of moving the last FDC frame slightly upstream for better PID in reconstruction.
CDC Update
- Straw installation - the last stereo row (24) is nearly complete.
- Tension tests - 6 broken wires were found in the 6 strung layers (and will be replaced during the next stringing session). All the wires did pass continuity testing soon after stringing; the tension measurements were made several weeks afterwards. The wires all broke in or near to the crimp pin. We plan to remeasure the tension in the other wires.
- A few of the CDC photos taken by CMU's photographer are on line.[CDC photos]
- The wire hookup prototype is finished and is being used for wiring practice. [PCB hookup prototype]
- Tim has sent out the cheeseplate spec to some vendors for comment prior to bidding. Labelling every hole will be cost-prohibitive so this might be reduced to 10% of the holes. We will have to accept stock material (polycarbonate), Tim will double-check that clear polycarbonate was specified.
