Difference between revisions of "December 22,2010 Tracking CDC/FDC"
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Naomi reported that after some hardware issues she had got the new fADC working through CODA. | Naomi reported that after some hardware issues she had got the new fADC working through CODA. | ||
[http://www.jlab.org/Hall-D/software/wiki/index.php/New_fADC New fADC] | [http://www.jlab.org/Hall-D/software/wiki/index.php/New_fADC New fADC] | ||
| − | The earliest hits in a track are in ~ sample 40 (320ns) so the buffer time ahead of the trigger will need to be increased to enable the pedestal to be fitted ahead of the event pulse. Switching back to the old ADCs somehow upset the (ageing) logic electronics and the new fADC setup is | + | The earliest hits in a track are in ~ sample 40 (320ns) so the buffer time ahead of the trigger will need to be increased to enable the pedestal to be fitted ahead of the event pulse. Switching back to the old ADCs somehow upset the (ageing) logic electronics and the new fADC setup is taking a break for the holidays. |
Revision as of 10:50, 23 December 2010
Meeting Time and Place
Wednesday December 22, 2010 at 11:00am At Jefferson Lab, the meeting will be held in F326
Connections
To connect from the outside, please use ESNET
1.) ESNET: 8542553
2.) Phone:
+1-800-377-8846 : US
+1-888-276-7715 : Canada
+1-302-709-8424 : International
then enter participant code: 77438230# (remember the "#")
Agenda
Minutes
Participants: Curtis, Naomi, Eugene, Beni, Mark, and Lubomir.
FDC Update
Lubomir reported on FDC construction and presented gas gain measurements and Garfield calculations for several Ar/CO2/CH4 mixtures.
CDC Update
Curtis gave an update on the construction status:
- The spec for the electrical hookups is undergoing discussion.
- The 7th row of straws is nearly complete. The 8th row will be started after the holiday break and will complete that block of stereo straws. Curtis is to be trained in straw fitting training this afternoon as a contingency worker because installing the straws requires 3 people working together. (Curtis and Naomi both did this). It takes about 1.5h to install 30 straws. Most of the other steps in the construction just require 1 person at a time.
- The plastic feedthrus and donuts have been checked with 100% acceptance. About half of the pin-holders have been checked; all but one (which was squashed) have been accepted. The accepted parts have been cleaned and are in storage in the cleanroom.
- After the first batch of straws, no more resistance issues have been encountered. The resistance of each straw (+donut+feedthru) assembly glued into the chamber has been acceptable.
- We are waiting to hear a date for delivery of the next batch of straws.
Naomi reported that after some hardware issues she had got the new fADC working through CODA. New fADC The earliest hits in a track are in ~ sample 40 (320ns) so the buffer time ahead of the trigger will need to be increased to enable the pedestal to be fitted ahead of the event pulse. Switching back to the old ADCs somehow upset the (ageing) logic electronics and the new fADC setup is taking a break for the holidays.
