NA50 Offline control of data taking

---

How to run a control job of data taking

The script dimu is /afs.cern.ch/group/wf/bin, you just have to type : dimu rec mob , or more simply : mob

The group-directory where one can find standard cradle and data for mob is /afs.cern.ch/group/wf/na50

The group-directory where one can find the proposed car-file for mob is /afs.cern.ch/group/wf/na50 : for 1996 lead data control, the suggested car-file is dimurecl.car (dimurecl G)

If mobyl.cra or mobyl.data cannot be found in your current directory, they will be copied from the group-directory

Note that mobyl.cra and mobyl.data are frequently updated (Last update 20 oct 96)

The output files :

The output files are at least mobylnn.output and mobylnn.hstore; mobylnn.hstore can be viewed using mobgen.kumac.

Running with option TESTADC and a HSA card with -1 or -2 parameters will produce histogram files named detnn.hstore, where det is bh, tgt, calo, muld, zdc and trig; all detnn.hstore can be viewed using outmob.kumac.

Running with option MOB willl produce one ntuple named nrun.hbk, where nrun is the run number. For users allowed to write into the group_directory, this ntuple will directly be stored into the /afs/cern.ch/group/wf/mobs directory.

Everybody can find the individual nrun.hbk ntuples, as well as the sum of existing ntuples (named sum.hbk) in the directory \afs\cern.ch/group/wf/mobs; all ntuples can be viewed using mobntu.kumac.

The group-directory where one can find the kumacs available to display the different output files is /afs.cern.ch/group/wf/mobs

Things to control :

General features :

============== magnetic field (see general histogram, number 100)

============== beam momentum

============== trigger type and subtype

============== target material and pattern

============== Number of bursts per burst (should be 1, if not, a WARNING is written during event processing).

============== Total of RMH errors and rejections

============== Number of ZDC (10%) and laser triggers (25 per burst?), as compared with dimuon triggers

Scalers :

Check at least the so-called important scalers (intensities and luminosities), then BH efficiency (plane 1 only) and T0J/TSJ ratio (about 86 %). Note that the Sigma BH scaler is prescaled by 10.

Dimuon features :

============== dimuon reconstruction efficiency

============== Reconstruction rates after TRACK and VERDET

============== Signal over background ratio

============== Number of J/psi (unweighted) per Sigma BH (should be around .24E-6 for standard 1996 target)

============== Look at histograms 400 to 405 in mobylnn.hstore

Upstream detectors :

Checking histograms :

Histograms can be easily checked using /afs/cern.ch/group/wf/mobs/outmob.kumac (to be updated very soon!)

General histograms (mobylnn.hstore, mobgen.kumac)

Histograms for BH control (bhlnn.hstore, outmob.kumac)

Histograms for target control (tgtlnn.hstore, outmob.kumac)

Histograms for calo control (calolnn.hstore, outmob.kumac)

Histograms for ZDC control (zdclnn.hstore, outmob.kumac)

Histograms for multiplicity detector control (muldlnn.hstore, outmob.kumac not yet implemented)

Histograms for trigger and spectrometer multiplicities (triglnn.hstore, outmob.kumac)

Back to NA38/NA50 computing and software