Fiber Tracker Meeting Minutes

multiple problems
sets of AF (almost full) value to 0 - makes clock be delayed by <1ms
CTS rate tied to Global rate - since crate 25 (L2) is now included in every run, running CTS adds deadtime to Global, etc.
yesterday couldn't do file copies on CTS computer

example plot
it is systematically the "upper four" channels, and the last ones read out are worst
see at CTS at 53MHz readout
do not see at P5 with 264/132
looked at unused channels on platform

only solution is to do calibration run
think the cause is changes (instabilities?) in VREF
highlights defficiencies in monitoring proceedure (just have to visually scan hit maps)
slides 7, 10 and 16 show example plots of pedestal movement

examples of definition of "dead channel"
example "dead VLPC" = two chunks of four dead channels; or four chunks of two dead channels
table of dead channels on slide 17

back in May: 275 total, 64 of which are VLPCs
as of August 15: 311 total, 72 of which are VLPCs
two VLPCs actually "recovered" May to August - faulty connection on cold synapse end?
also have 7 or 8 "latched" VLPCs (show large RMS), most are still from last winter's warmup

talk slides
Andrew: How stable is the code? only crashes because of SAM file delivery failure
Are there plans to CVS the code? No, but it should be! Mike?
Emphasize that should look at _all_ the plots before deciding on what cuts / limits to pick
Fred: will organize a group of people to look at Mike's plots and make choices
Drew: suggest adding entries in the database for the CPS and FPS. Can we also distinguish between axial and stereo CFT?
link to documentation of the code changes made
link to notes similar to this presentation
locations of accumulated data from this study are here and in the run quality database

access status key: O=open, M=movement?, R=restricted, B=beam
will try to have 16 boards modified per day
George: concerned about bayonnet damage; Fred: plan to do the testing before putting the bayonnet back in.
caveat: have not talked to Jon Anderson about the schedule for the technicians

want to add ability to do quick-swaps and remote power reset
also need to separate remote power on/off controls for each sequencer DFEA crate LVPS

Paul: firmware will have to be changed when boards are modified, but new firmware will still run at 40 until this 53MHz test phase
deadline for getting 53MHz mode working is October 17
Jadzia: there is a bad slot in one of sequencers. Will that be fixed? - no plans to

open access ends October 26
aiming for first good beam on November 17
will not re-start scheduling owl shifts until October 20; don't expect to have to actually be there until November 10
need to find out if other systems are going to need our stuff functional during the modification period
Paul: do we want LED runs? Jadzia: would like to do one before the modifications start if possible

Stefan: should schedule a "new expert" review tutorial before the shutdown.
George: is the cryo and refrigeration system good to go for another year or two (till next shutdown)? - check with Russ
Stefan: what about FPD trigger readout - are they going to be modifying it? It might interfere with CTT debugging. - need to check