Spikes in trigger rate Periodic With B ON in 2008 Without B on during MWGR18 Sporadic MWGR 19 Strip noise profile 6 may 22 April REASON HV problem in RB1 out sect 12 Noisy topology ID: 790054
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Slide1
Noisy topology: (1)coherent
Spikes in trigger rate
Periodic:
With B ON in 2008
Without B on during MWGR18
Sporadic
Slide2MWGR 19
Strip noise profile
6 may
22 April
REASON: HV problem in RB1 out sect 12
Noisy topology
: (
2)
coherent
High rate:
constant like during MWGR19 or in 2008 because of DT HV problem in one sector)
Slide3Run history (MWGR 18)
Done by Seungen
Noisy
OK
No data
Noisy topology: (3) non coherent (?)
Slide4W+2 RUN 83079 - 83081
S5
83079
83081
TH = 230 mV to all TH changed on some chambers
Slide5S5 @ RUN 83081
LV = off
Noisy in the some
channels
in:
RB4 - & RB3- back
RB4 + & RB 3 + back
FORW OK
RB4 16 strips x
feb
RB3 14 strips x
feb
These SIGNAL CABLES are near each only into the LB
Slide6Sect 6 @ RUN 83081
Forw
OK
LV ON Noisy in some channels
RB4- & RB3- backRB4+ & RB3+ back
Slide7S5 @ RUN 83081
Occupancy
vs
time
Slide8What was done and what has to be done
Coherent
Noise:
Hardware interventions: a lot actions done. Other tests will be done this week or when someone has
other idea..(DT cables) From data point of view:
periodic. It was already studied.
Sporadic: we have 6 months of data and monitor on line
Silvia is taking care of the monitor data.
Seungen and (Salvatore ?) is taking care of the data
Noisy chamber/strips (have to be done):
Map
of average
noise
at
different FEB threshold and different applied voltages.
Map
of dead strips and noisy strips
Slide9Mean average noise
vs
TH
Slide10Planning for data taking (this week)Day
ItemWheels/disks
Who (respons.)
With What
MonHard intervention HV-LV barrel & endcapAllAllTues
LV system
All
Pigi
CCU
shielding
W-2
Marcin
LV CAEN Firw1 tower -1 farGiovanni +
Wed
Noise
studies
Few
chs
on W?
Pigi
Monit
. on line
Thurs
MWGR (?)
Barrel +
endcap
Noise
LV (cont.)
Few chambers on W?
Pigi
Monitor on line +
Fri
Connectivity test
Disk -1/-2
Filip
XDAQ
Noise test:
Turbine OFF
Read out test
1
Wheels
(?)
marcin
MINIDAQ
Slide11MWGR is planned for Monday and Tuesday. We can decide to not go in.
Noise map for barrel and
endcap
with MiniDAQ
& random trigger with Monitor online However
No date for missing (few) chambers in
endcap
TTU commissioning can not be done. It can be planned for the week after (25 of May).
in principle the noise should be studied in // with the efficiency. For the chamber performance we need DT or with TTU
(when and if will be ready). It can be planned for June during CRUZET1 or between CRUZET1 and CRUZET2.
Data taking (coming
Weeks
)