Fiber Tracker Meeting Minutes

discovered can get rid of double peaks if P-clamp is reset every cycle, but this has side effects - the worst of which kills SVX channel 49 (because of the trace mixing)
have started training new experts; want to schedule another meeting for later this week
next Tuesday, online system will be off all day
the 18th, 21st, and 25th of October will be 8-hour power outages
September 8th, 29th, and October 13th will be 1-hour power outages at 7am
RecoCloggers - e-mail from Harry Melanson
run grading update (slides)

should split into 6 "detectors" - CFT, CPS, FPS, each with discriminator and trigger
this is a first shot at defining what cuts to make:

Jadzia wants to see a study based more on knowledge of the detector and not based on just cutting on distributions. For example, find some good runs and some bad runs, then set up qualifications such that these runs retain their definitions
this is still an open issue that needs to converge
big question: who is going to do this?

wants to address concerns of what has been happening when there is no beam
during the day, the shifter should still be there checking the distributions
have seen examples of shifters assigning themselves to be on call - SHOULD NOT HAPPEN!
captains also need to be reminded that they do not have the authority to tell shifters they can go on-call
we have instabilities going on right now and need shifters to be present to catch problems when they happen
shall we as a group revoke the ability to go on-call? no, just make it clear that on-call priviledge only applies between 10pm and 8am, and only under certain conditions

talk slides
TPP = transition patch panel
problem comes from low channels
it's not that the structure hasn't been seen before, but that the vertical size of the structure has gotten bigger
signal average is 100ADC counts, therefore signal to noise is 5-to-1
Drew: going to have to have offline thresholds
want to put a Level 1 cut to get rid of showers, so need to apply online thresholds to do this
Drew: this pattern may not show up in the SIFT discriminators, so have a look at those before making a decision.

MC makes this a flat plot
either we don't understand what we're plotting, or we don't understand the calculation on the previous page.

more plots from logbook; dip is more pronounced - slide
no dip if only calculate detector eta - slide
eta histograms - slide
why such a big difference? why this odd shape? - slide
Drew: have a look at plot of eta, for each of the supersectors please
ask Mike Hildreth to add possibility of having a different cut for axial and stereo (20 and 10 or similar); Would it be possible to have a finer distinction?

due to the way the Level 2 preprocessors are run, had to couple crate x13 to sequencers 3 and 5; as a result all crates are now inter-dependent. Only one run can be done with the whole system at a time. Trying to go against this is not as obviously broken as before - crate x13 will not go FEB, but crate x13 triggers will be completely screwed.
still some bugs in the CPS preshower stereo code
might still be a problem with L2 CTT input getting messed up every 4 hours