TOF Calibration Software Progress Xin Dong for TOF
TOF Calibration & Software Progress Xin Dong for TOF Group Calibration Status -- 62 Ge. V results -- 200 Ge. V TOF Offline software -- Data base -- Makers - match - calibration - Mu. Dst Where are we & usage of TOF? July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 1
TOF detectors in Run IV y Some changes this year: x East-TPC TOFp TOFr TPC p. VPD east p. VPD west TOFx Au Ø p. VPDs moved ~4” further from Z=0 Ø TOFp moved one slot clockwise when facing west from the east side --- read out channels no change (41) Ø TOFr did not move, but the tray size and module positions in the tray changed --- First 20 modules (out of 32) in the tray have read-out electronics ( 72+48 channels totally) Au July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 2
TOF in 62 Ge. V Au. Au run ~110 ps resolution in both TOFr & TOFp systems. (~55 ps starting timing resolution) L. J. Ruan, P. Sorensen TOFr Au+Au 62 Ge. V M. Shao July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 3
200 Ge. V Au. Au calibration --- TOFr M. Shao 85 ps (~27 ps start timing) July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 4
Au. Au 200 Ge. V calibration --- TOFp J. S. Wang July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 5
TOF detectors performance Timing Resolution (ps) Run III Run IV p. PVDs TOFr system TOFp system d+Au @ 200 Ge. V 85 120 (85) 100 -140 p+p @ 200 Ge. V 140 160 (85) - Au+Au @ 62 Ge. V 55 105 (89) 110 (95) FF&RFF, w/o E p. VPD 40 95 (86) 147 (134) FF&RFF 27 86 (82) 120 -130 (117) HF 20 82 (80) 137 (135) Au+Au @ 200 Ge. V July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 6
TOF dbase Data Base Many new introduced structures ØTOF configurations --- ready --- p. VPD configuration --- p. VPD Strobe events configuration --- tof detectors configuration --- tof Tray configuration --- tof Module configuration ØDAQ mapping --- ready --- tof DAQ mapping ØCalibration parameters --- ready --- tof T 0 (timing offset) --- tof Correction (overall) --- tof Correction (each channel) ØTiming resolution --- ready ØSimulation parameters --- ready --- MRPC simulation parameters ØTOFp Geometry Calibrations for Au. Au 200 Ge. V are done, (M. Shao, J. S. Wang et al. ) -- parameters have been put into dbase Ready for the production ! July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 7
TOF Offline Software STAR/TOF DAQ Reader, TOFMaker GSTAR geant hits TOF Mixer Maker TOF Simulation Maker TOF Collection St. Event TOF Data TOF Match Maker TOF Cell/Slat TOF MCCell/MCSlat TOF Calibration Maker TOF Hit St. Tof. Pid. Traits Mu. TOFUtil + Mu. Dst Maker Mu. Dst TOF July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 8
Where are we? Ready! Waiting for the production! Mu. Dst structure: Mu. Event Mu. Tracks (primary) Mu. Global. Tracks …. V 0. . Mu. Tof. Hit (calibrated physical variables) Mu. Tof. Data ( raw Tof Data for large scale calibration ) … July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 9
Usage of TOF In St. Event: St. Track -> St. Tof. Pid. Traits -> tof, beta, n. Sigma. E (Pi, K, P), etc. In Mu. Dst If there is no update on the St. Mu. Track for ( primary tracks … ) { St. Mu. Track *trk = …. short trk. Id = trk->trk. Id(); …. for ( tofhits ) { St. Mu. Tof. Hit *tofhit = … if (tofhit->associated. Track. Id()==trk. Id) { …. } } // end tof hit loop } // end track loop July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 10
Many Thanks To software group July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 11
backup July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 12
July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 13
July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 14
Auau 200 Ge. V calibration Data Set STAR run 4 200 Ge. V Au+Au collision Test production : /star/data 45/, /star/data 36/, /star/data 46/(new) ~500 k events with primary vertex ~480 k p. VPD fired events, ~94% of them all 6 channels fired ~300 k TOFr matched tracks out of ~250 k matched events run# 22 -28: ~25 k matched tracks 28 -35: ~35 k matched tracks 57 -62 ( half field ): ~45 k matched tracks 39 -56 and 63 -83: ~200 k matched tracks before run# 22 no TOFr data (detector off) July 17 th, 04, Collaboration Meeting, BNL X. Dong, USTC/LBNL 15
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