October 27,2010 Tracking CDC/FDC
Contents
Meeting Time and Place
Wednesday Ocyober 27, 2010 at 11:00am At Jefferson Lab, the meeting will be held in ARC 428
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
- Announcements
- FDC Update logbook
- CDC Update [1]
- CDC Flow rate
- CDC heated gas measurements Heated_gas_measurements
Minutes
CDC Update
CDC Construction
The CDC review last week went well.
We have a few straws dry-fitted into the CDC and the technicians have been practising stringing and crimping with these straws, they have come up with some improvements to the stringing procedure (using a magnetic probe for needle reception).
We still need the crimper drawings from Steve Cristo - Beni will check with Tim - and some new wire.
ADC125
The new fADC is installed and apparently working through CODA but the readout needs some more software work. Naomi will talk to Beni about this. It also needs some hardware ingenuity to make up a trigger for Fe55 measurements.
Flow rate
The measurements on Flow rate were discussed, in particular what causes the highest amplitude peak at 2050V and above, and why the flow rate affects the pulse amplitude. Naomi will:
remove the small flowmeter between the gas mixer and the CDC prototype;
uncollimate the Fe55 source (to get a higher rate, presently 27 counts/sec);
put premixed gas through one channel of the mixer;
add event pictures to the wiki.
CDC heated gas measurements
Brent Driscol's results from heating the CDC prototype were presented Heated_gas_measurements
