LAV tests at CERN
Francesco Gonnella
TDAQ Commissioning
16 April 2014
Francesco Gonnella - Laboratori Nazionali di Frascati
1
Status of LAV stations
LAV updated situation
LAV station
HV
FEE
FEE
Crate PS RasPi Boards firmware
Signal CAN chain
cable cables
CAN
terminator
Dongle TDC
Mech.
TEL 62 TEL62 fw
A1
A2
A3
A4
A5
ok
yes
yes yes
yes
1.01.384
yes
yes
yes
no
yes
yes
old ok
20131113 0,1,2
ok
yes
yes yes
yes
1.01.384
yes
yes
yes
yes
yes
yes
old ok
20131113 0,1,2
ok
yes
yes yes
yes
1.01.384
yes
yes
yes
yes
yes
yes
old ?
20131113 2,3
ok
yes
yes yes
yes
1.01.384
yes
yes
yes
no
yes
yes
new ?
20131205 0,1,2
ok
yes
yes yes
yes
1.01.384
yes
yes
yes
no
yes
yes
no
A6
offline yes
no yes
yes
1.01.384
yes
yes
yes
yes
ECN3
no nose
support no
A7
offline yes
no no
yes
1.01.384
ECN3
no
no
no
ECN3
no nose
support no
A8
offline yes
no no
yes
1.01.384
ECN3
no
no
no
ECN3
no nose
support no
A9
storage
room
??
no
no
storage
room
no
A10
storage
room
??
no
no
storage
room
no
Frascati
??
no
storage
room
no
Frascati
??
no
??
A11
A12
TDCBs
no
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
2
LAV detector Reparation
LAV1
Signal channels not working:
Fixed
L1ch27, HV problem
LAV2
L4ch21, L4ch23, draw few current, but no signal no ground reference Fixed
L4ch22, short circuit at 100V, HV cable is OK, on the flange 3.4 Mohm HV Cable
LAV3
L0ch4, ZERO HV current Fixed
LAV4
L2ch4, ZERO HV current, no signal HV Cable
LAV5
All channels appear to speak too much ...
L1ch7 no signal, HV OK Fixed
L2ch14, HV card tripped, let's change it HV Board Changed
L4ch2, ZERO HV current
HV Cable
L4ch9, HV recheck, speaks too few....
Fixed
LAV6
All OK
LAV7
All OK
LAV8
L1ch15, no signal Fixed
L1ch4 tripped, to check with or without HV cable, etc. Fixed
BANS 4-7 of layer1 , recheck! From ch0 to ch7 HV tripped??? Fixed
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
3
LAV readout
 Only LAV1 and LAV2 are currently equipped with working
TEL62s (old) and TDCBs
 LAV3 TEL62 has a faulty DDR and a faulty TDCB connector,
unfortunately not on the same slot…
 LAV4 is equipped with a new TEL62 and 3 TDCBs v7, I hope to
make it run in the next days (with help from Ppisa)
 Noisy channels and dead channels on LAV1 and LAV2 were
fixed. Problems were due to:


TDC cables (extremely fragile connection to TDCBs) 2 replaced
Signal cables 1 was replaced
 Waiting for a detailed analysis of data taken last night
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
4
“Let there be light” (again)
LAV1
LAV2
LAV3
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
5
Last-night data: occupancy
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
6
TDC unit = 98 ps
Last-night data: time over threshold
LAV1
LAV2
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
7
TDC unit = 98 ps
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
8
Time difference between L and H
TDC unit = 98 ps
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
9
Last-night data: Block-Block correlation
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
10
Thanks
 Thanks to Tania and Vincenzo for their excellent job
 Thanks to Roberto Piandani for spending these last two weeks
on Skype with me
Francesco Gonnella - Laboratori Nazionali di Frascati
16 April 2014
11
Thank you for your attention
[email protected]
16 April 2014
12