Strips operations 2012 outlook Strip Tracker Status LD Tracker status TPO 22032012 1 Dead channels evolution ltSSTgt 15 22 2 1 CR short HV shorts Lost 1 CR ID: 498920
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Slide1
Lino Demaria – INFN Torino
Strips
operations
, 2012 outlookSlide2
Strip Tracker Status
L.D. : Tracker status - TPO 22/03/2012
1Slide3
Dead channels evolution:
<SST> =1.5
2.2%
2
1 CR short
HV shorts
Lost 1 CR
% of dead channels
HV open
CR shorts
<SST> = 1.5
2.2%
Strip Tracker @ 97.8%
Begin 2011Slide4
Channels excluded from DAQ: time evolution
<SST> =1.5
2.2%
3
2 TIB Cooling
Loop closed
1 CR short
HV shorts
Closed CL
recommisioned
Lost 1 CR
% of dead channels
1 TID Cooling
Loop closed
1 TID Cooling
Loop
recommissioned
HV open+ 1 CL closed
CR shorts
<SST> = 1.5
2.2%
We were able to promptly recover modules associated with closed cooling loops
They were recovered before physics data taking, both during 2010 and 2011Slide5
Short in CR: 0.35%
Recoverable at LS1
Work@Patch
panel
Short in CR: 0.35%
Recoverable at LS1
work@Patch
panel
Lost CR: 0.35%
HV shorts
Alive channels:
97.75
%
TIB 94.3%
TID 98.1%
TOB 98.2%
TEC 98.9%
Details
:
2 CR in short (~0.7%)
1 CR missing (0.35%)
HV lines missing(0.1%)
HV lines shorts (0.7%)
fibers
/CCU /others (0.4%)
R
ecoverable
at LS1:
2-3 CR corresponding to 0.7-
1
%
4
NEW : TOB 3.1.2
à one TOB control ring (layer 3)
that
now
needs
redundancy
to skip one CCU (6 modules)
à
happened
last
year
directly
at
HI startupSlide6
Radiation damage
5
L.D. : Tracker status - TPO 22/03/2012Slide7
Leakage current radial dependence
6
L.D. : Tracker status - TPO 22/03/2012
Strip Tracker
Pixel Slide8
Dependence with Fluence
and annealing
7
L.D. : Tracker status - TPO 22/03/2012Slide9
Model Predictions
8
L.D. : Tracker status - TPO 22/03/2012Slide10
L.D. : Tracker status - TPO 22/03/2012
9Slide11
L.D. : Tracker status - TPO 22/03/2012
10Slide12
Depletion Voltage
L.D. : Tracker status - TPO 22/03/2012
11Slide13
Hybrid temperatures
12
Closed CL:
3 TIB L3 CL
1 TOB L4 CL
1 TID R1-R2 CL
NOT to be forgotten !Slide14
Silicon Detector temperatures
13
Closed CL:
3 TIB L3 CL
1 TOB L4 CL
1 TID R1-R2 CLSlide15
Strip Tracker cooling
L.D. : Tracker status - TPO 22/03/2012
14
Now running at 4C, stable. Low leak in SS2
Crucial for Tracker future the running at low temperature after LS1 (more on
Ettore’s
talk)
Cold test done this year is missing a flow measurement on main circuit (to be done next TS)
Upgrade needed for Primary Cooling (Evaporator; maybe also Compressor) and for our two cooling plants (SS1 and SS2)
Understanding the scenario of
running at -25C
(not obvious for cooling system and for humidity in services)
Crucial decision this year (spring) for the lifetime of the detector - Good work of the Cooling Working GroupSlide16
L.D. : Tracker status - TPO 22/03/2012
15Slide17
Readiness for 2012
16
L.D. : Tracker status - TPO 22/03/2012Slide18
LHC challenges this year
L.D. : Tracker status - TPO 22/03/2012
17Slide19
L.D. : Tracker status - TPO 22/03/2012
18Slide20
Perspective for 2012 pp running:
High PU and 25 ns Operations
High Pile-UpHigh Pile test run very successfulWe can take data with 5 10
30
cm
-2
s
-1
/bunch at 110 kHz of zero bias L1 triggers (PU=30)
We expect to be fine for 7 10
33 cm-2s-1
, 50 ns bunch spacing environment25 nsThe
SiStrip Tracker was designed for 25 ns operations Test runs were successfulSmall increase of OOT PU
TK General 28-Nov-2011
Lino Demaria - Strip TK operations summary, YETS plans, 2012 outlook
19Slide21
Tracker status (1)
L.D. : Tracker status
- TPO 22/03/2012
Recent Achievements
Data for alignment:
0.75M good tracks with B=0
0.86M good tracks with B=3.8T
other 1.24M needed before June (=3.5 days of
cosmics
data taking)
DCU calibration taken
IV scan done
DAQ team fixed the problem of Tracker configuration (see Derek presentation on Monday)
20Slide22
Tracker status (3)
L.D. : Tracker status - TPO 22/03/2012
Problems under workFED configuration problem (few FPGA not well configured) – affect at low level
APV-APVE timing mismatch
No change on Tracker hardware
GT-
TTCmi
cables changed (1-2ns)
Past problems were solved with APVE firmware changes
S/N decreased of up to 5% in
cosmics taken on peakEarly 2012
cosmics in deconvolution
were fine (timing seems fine) Evidence of radial dependence shownOffline producing more plotsOthersTEC-4.8 looses clock/trigger time to timeDiscussion with ring expert needed – Erik organizing that
TEC+ interlock
21Slide23
Tracker Status (2)
L.D. : Tracker status - TPO 22/03/2012
22
Test still to be done – outside beams
Noise
vs
bias scan
Power Scan
Planned test during first collisions
3.5M events with one colliding bunch (first fill 1-2h)
Full HV-scan (2h)
Delay run (0.5h, data ok for physics)Slide24
Cosmics
2012
23
L.D. : Tracker status - TPO 22/03/2012Slide25
Cosmics in Deconvolution
modeL.D. : Tracker status - TPO 22/03/2012
24Slide26
L.D. : Tracker status - TPO 22/03/2012
25Slide27
L.D. : Tracker status - TPO 22/03/2012
26Slide28
22/03/2012
TPO meeting
27
Charge in Run2011BSlide29
Beams 2012
28
L.D. : Tracker status - TPO 22/03/2012Slide30
CMS scheduling for first collisions
https://twiki.cern.ch/twiki/bin/viewauth/CMS/CollisionsMar2012L.D. : Tracker status - TPO 22/03/2012
29
first 3x3 bunches
Tracker peak mode
First 48x48 fill
Timing run
Second 48x48 fill
Tracker bias scan
84x84 fill
Pixel bias scan
ES at
high gainTracker delay run Slide31
Conclusions and toughts
L.D. : Tracker status - TPO 22/03/2012
30
Tracker ready for collisions this year
No problem seen for high pile-up not radiation damage
DAQ is always under-pressure
DCS is loosing people – going to central support
We need to be careful on evolution of dead parts
Dead part at 2.25% (~1.3% in TIB)
Parts without cooling to be better understood (thermal instabilities / temperature)
Cooling performance + radiation damage = lifetime of Strip Tracker
Tracker should survive up to LS3
On radiation damage: only few people working on itIn INFN there are several experts that could contribute (many participant to RD50) Slide32
Backup
31
L.D. : Tracker status - TPO 22/03/2012Slide33
L.D. : Tracker status - TPO 22/03/2012
32Slide34
L.D. : Tracker status - TPO 22/03/2012
33Slide35