[Brahms-dev-l] brat 2-17-2

Hello again,

I've just updated brat, version is now 2.17.2 and tag is 2-17-2.
The changes deal with two things, mainly:

* FFS tracking : I simply removed all reference to a temporary T2 track 
line. This ugly hack that I introduced long ago can no longer be used.
If you happen to have a script with 

BrFfsTrackingModule::UseT2Correction(), 

remove it since the method no longer exists. There were lots of modules 
that were using this tmp T2 line...
I also suggest you compile brat from scratch (make distclean; configure, 
make) to avoid conflicts.


* TOF calibration : I introduced the possibility to bypass the fitting 
routines at Finish. The idea is like the one I introduced for the 
beam-beam counters, i.e. an extensive use of the farm. I checked in a 
masterTOFCal.sh and I updated the OfflineTofCal.C. Basically, do the 
following:

look at my directory ~ouerdane/ana/run04/tof (rcas) to set up your
calibration directory, you need:
  ./masterTOFCal.sh
  ./adcgain/TofAdcGain.C
  ./adcgap/TofAdcGap.C
  ./deltadelay/TofDeltaDelay.C
  ./timeoffset/TofTimeOffset.C

(the slewing follows another kind of procedure so, it's not included in 
this scheme).

then, on rcas, use the master script: 

Usage: masterTOFCal.sh [option]

     --begin          -b     Begin run number   [0]
     --detector       -d     Specify one or more detectors  [all]
     --end            -e     Final run number   [0]
     --help           -h     Gives this help
     --indir          -i     Input directory    [/brahms/u/ouerdane/d08/data/run04/auau/200]
     --outdir         -o     Output directory   [/brahms/u/ouerdane/ana/run04/tof]
     --queue          -q     Job queue          [brahms_cas]
     --sequence       -s     Number of sequence [1000]
     --task           -t     Calibration task (adcgap, adcgain, deltadelay,  timeoffset or pid)  [adcgain]
     --verbose        -v     Be verbose         [0]
     --gtr-version    -V     Version number of gtr files [1]


As you can see, you have to use global track files and use the version 
number of those files. You can also use a different job queue (crs or 
cas). I usually use it this way:

./masterTOFCal.sh -b 11300 -e 11310 
                  -i <some input dir> 
                  -o <some output dir>
                  -t <some task>

note that <input dir> and <output dir> should be the base dir of the glb 
track files and TOF cal (do not include /<runno>/gtr).

Then all sequence histogram files of a given run will be merged. You can
also decide to transfer them to a remote machine. You can also use the
brat application 'mergehistfile' to merge the run histogram files 
altogether. Once you have done that, you can use the 
brat/scripts/calib/tof/OfflineTofCal.C

bratroot -l
.L OfflineTofCal.C

then you have the choice between:
adcGain(...)
adcGap(...)
deltaDelay(...)
timeOffset(...)

Of course, you must choose the method that correspond to the histogram
file you have generated. Each of these methods will generate an ascii file
with cal values for the given detector. You can call display(...) to check
all tubes and refit if necessary:

display(Bool_t <top tube>, Int_t tube = -1)

if tube is -1, it simply increments automatically until the max tube 
number and goes back to the beginning.

Note the following: I changed the algorithm for the adc gain cal.
Since there is a y dependence, I plot a profile : ADC vs Ytrack.
I fit the profile with a 2nd order polynomial and pick up the value at 
Y = 0. This fit turns out to be very good for ALL TOF dets, even the 
weirdest y dependence. So do not hesitate to use it.

In all subsequent brat modules using the energy loss in the slats, I made 
sure that the cut is made on the geometrical average sqrt(Etop x Ebot) so, 
no worry to have here.

If you need more info or could not make the stuff work, ask me, I will
help you.

Thanks to these scripts, I broke all speed records when I calibrated the 
whole 63 GeV data (including of course careful checking :) 

That's all, sorry for the length :)

Djam



-- 
Djamel Ouerdane ------------------------------------------o
|  Niels Bohr Institute      |  Home:                     |
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|                  ouerdane@nbi.dk                        |
o---------------------------------------------------------o

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