Dead or alive ??!! …

Erika & Patrizia …

… this story begins when …

… we were trying to produce the KMP dst’s for 2004 data …

To produce KMP dst’s we MUST re-track … that means -> to reproduce the List oh the DC hits reproduce the List oh the DC hits DTCE and DHRE1 DTCE and DHRE1 banksbanks !!!!

So we had to cope with a different path of datarec modules w.r.t. 2002 data

RAW2DTCERAW2DTCE

1) produces DTCE banks

2) masks HOT channels from DB2

3) does NOT mask DEAD channels

RAW2DTCE RAW2DTCE

1) produces DTCE banks

DCDELETE DCDELETE

1) masks HOT channels from DB2

2) masks DEAD channels from DB2

N.B. HOT wires HOT wires from DC triplets from DC triplets

DEAD wires DEAD wires from TRKMON from TRKMON

2002 data 2004 data

... production of KPM dst’s …

… reproducing the list of the DC hits “works” calling RAW2DTCE & the list of the DC hits “works” calling RAW2DTCE & DCDELETE with the proper talk-toDCDELETE with the proper talk-to

… BUTBUT … looking at the log files we found:

RUN 29000 # of dead wires found 2080

RUN 29121 # of dead wires found 2106

RUN 30000 # of dead wires found 2153

RUN 30200 # of dead wires found 2165 Traditional definition of DEAD wireTraditional definition of DEAD wire : 1) no response when pre-card pulsed

2) HV card or channel not working

… constantly monitored by the DC triplet … TRKMON definition of DEAD wire ( Inserted in DB2)TRKMON definition of DEAD wire ( Inserted in DB2) :

Wire with efficiency < 30%

N.B. inefficient wires are NOT dead wires !!!!N.B. inefficient wires are NOT dead wires !!!!

efficiency is evaluated without DCTRIPS and used in the MC 2002 simulation

15% of DC

15% of DC

is m

asked

is mask

ed

Where are the “dead” wires … ???

2000 masked wires

500 masked wires

Which is the effect the “dead” wires … ???

Run #29000 with 2090 “dead” wires

NTAG ()

NTAG ()

5% of the tags are lostmasking the dead wires

7% of the tags are lostmasking the dead wires

So now… what can be done ?For 2005 data takingFor 2005 data taking

• Insert in DB2 the list of real dead wires from DC triplet• Run TRKMON with DCTRIPS to obtain reliable efficiencies to be used in MC

For 2004 dataFor 2004 data• Scratch the existing list of dead wires in DB2 and insert the list of real dead wires from 2004 DC triplet • Reprocess 2004 data (at least for KPM stream!)• Run off-line TRKMON with DCTRIPS to obtain reliable efficiencies to be used in 2004 MC

For 2002 MCFor 2002 MC• Scratch the existing list of dead wires in DB2 and insert the list of real dead wires from 2002 DC triplet (need to run off-line DEADCHANNELS on the archived files PRE,ADS and DCH to reproduce the list) • Run off-line TRKMON with DCTRIPS to obtain reliable efficiencies to be used in MC

HAVE FUN !!!!!!HAVE FUN !!!!!!