History of DELANA and DSTANA reprocessings

1998

98D

See the DELANA processing history page.

D1

First DSTANA reprocessing:

the track fit has been updated using the DELANA one (see the release notes for further details); the refit of electrons inside ELEPHANT is now performed correctly.
HPC noise suppression for 98D.
correction to gamma conversion reconstruction: Veto V0 candidates from Delana and tagged muons; both tracks from conversion should have no hit before vertex, excluding ID strawtubes.
EMF corrections for noisy channels.
HAC final energy fixing based on 98C.
updated HACCOR to match the new HADANA using the cathode readout at DELANA level.
the refit of tracks taking part into a V0 in which the vertex lies after the first measured point has been temporarily suppressed because of an incompatibility with the new track fit software. This affects only a minor fraction the V0 decaying after the VD.

D2

Tuned reprocessing for physics analysis:

HPC: fixes to energy and Z corrections; updates to noise suppression. New refitting of shower axis.
RICH alignment.
maximum number of possible V0 candidates increased from 50 to 100.

98C

Full reprocessing with first complete alignment; correction of TPC distortions; first HPC calibration.

C1

First approximation of DSTANA.

C2

DSTANA with tuned ELEPHANT, RICH, HCAL. Should match the 98A1 Monte Carlo.

98A1 (Monte Carlo)

Corresponds to the 98C processing (best match with the 98C2).

1997

97E

First full reprocessing with the NFT version of the tracking code, using the VFT points in the tracks. Other improvements wrt 97D:

full VFT internal alignment
modification of the fitting to use single point TER from VFT
modification of the VFT DST structure
module by module calibration of the HPC energy using the Kr
FCA internal calibration for 97
modification of the ID fix to correct one bad sector
determination of scaling factors for detector error matrices

E2

First DSTANA version tuned for analysis:

Tuned ELEPHANT (leakage corrections)
Tuned RICH

Known bugs:

No SMC in muon identification
Offset of 3% in electron energies, 10% in photon energy
Top-bottom effects in refractive index for RICH
97E2 was thought to correspond to the 97E2 Monte Carlo, but this last was affected by a wrong efficiency table for the VD, causing a bad modelling of the efficiency for tracks with hits in all 3 layers.

E3

Fixed problems in calorimetry, muon ID, RICH (corresponds to the 97F3 Monte Carlo, in which the problem in the efficiency tables for VD has been fixed). New Hadron Calorimeter code.

97F (Montecarlo only)

Corrected efficiency table in VD simulation. No changes for real data.

F3

No changes in DSTANA w.r.t. 97E3.

97X (Real Data only)

Test reprocessing with event streams selected to test the proposed 1998 data flow. Some databases changes with respect to 97E DELANA.

X1

DSTANA corresponding to 97E3 + update for the proposed 1998 data flow scheme.

Last update 8 January 1999
F. Cossutti, A. De Angelis, T. Spassoff and J. Wickens