STRIPS OPERATIONS 2012 OUTLOOK Lino Demaria INFN Torino

STRIPS OPERATIONS, 2012 OUTLOOK Lino Demaria – INFN Torino

Strip Tracker Status L. D. : Tracker status - TPO 22/03/2012

% of dead channels Dead channels evolution: <SST> =1. 5 2. 2% Lost 1 CR short HV shorts HV open <SST> = 1. 5 2. 2% CR shorts Strip Tracker @ 97. 8% Begin 2011

% of dead channels Channels excluded from DAQ: time evolution <SST> =1. 5 2. 2% 2 TIB Cooling Loop closed CL recommision ed 1 CR short HV shorts HV open+ 1 CL closed 1 TID Cooling Loop recommissioned Lost 1 CR <SST> = 1. 5 2. 2% CR shorts We were able to promptly recover modules associated with closed cooling loops They were recovered before physics data taking, both during 2010 and 2011

Short in CR: 0. 35% Alive channels: 97. 75% – – TIB TID TOB TEC Short in CR: 0. 35% HV shorts Recoverable at LS 1 work@Patch panel Recoverable at LS 1 Work@Patch panel 94. 3% 98. 1% 98. 2% 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%) Lost CR: 0. 35% Recoverable at LS 1: 2 -3 CR corresponding to 0. 7 -1% 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 startup

Radiation damage L. D. : Tracker status - TPO 22/03/2012

Leakage current radial dependence Strip Tracker Pixel L. D. : Tracker status - TPO 22/03/2012

Dependence with Fluence and annealing L. D. : Tracker status - TPO 22/03/2012

Model Predictions L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

Depletion Voltage L. D. : Tracker status - TPO 22/03/2012

NOT to be forgotten ! Hybrid temperatures Closed CL: 3 TIB L 3 CL 1 TOB L 4 CL 1 TID R 1 -R 2 CL

Silicon Detector temperatures Closed CL: 3 TIB L 3 CL 1 TOB L 4 CL 1 TID R 1 -R 2 CL

Strip Tracker cooling Now running at 4 C, stable. Low leak in SS 2 Crucial for Tracker future the running at low temperature after LS 1 (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 (SS 1 and SS 2) � Understanding the scenario of running at -25 C (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 Group L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

Readiness for 2012 L. D. : Tracker status - TPO 22/03/2012

LHC challenges this year L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

Perspective for 2012 pp running: High PU and 25 ns Operations High Pile-Up � � � High Pile test run very successful We can take data with 5 1030 cm-2 s-1/bunch at 110 k. Hz of zero bias L 1 triggers (PU=30) We expect to be fine for 7 1033 cm-2 s-1, 50 ns bunch spacing environment 25 ns � � � The Si. Strip Tracker was designed for 25 ns operations Test runs were successful Small increase of OOT PU Lino Demaria - Strip TK operations summary, YETS plans, 2012 outlook TK General 28 -Nov-2011

Tracker status (1) Recent Achievements � Data for alignment: 0. 75 M good tracks with B=0 0. 86 M good tracks with B=3. 8 T other 1. 24 M 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) L. D. : Tracker status - TPO 22/03/2012

Tracker status (3) Problems under work � � FED 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 -2 ns) � S/N decreased of up to 5% in cosmics taken on peak Past problems were solved with APVE firmware changes Early 2012 cosmics in deconvolution were fine (timing seems fine) Evidence of radial dependence shown Offline producing more plots Others � TEC-4. 8 looses clock/trigger time to time � Discussion with ring expert needed – Erik organizing that TEC+ interlock L. D. : Tracker status - TPO 22/03/2012

Tracker Status (2) Test still to be done – outside beams � Noise vs bias scan � Power Scan Planned test during first collisions � 3. 5 M events with one colliding bunch (first fill 1 -2 h) � Full HV-scan (2 h) � Delay run (0. 5 h, data ok for physics) L. D. : Tracker status - TPO 22/03/2012

Cosmics 2012 L. D. : Tracker status - TPO 22/03/2012

Cosmics in Deconvolution mode L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

Charge in Run 2011 B TPO meeting 22/03/2012

Beams 2012 L. D. : Tracker status - TPO 22/03/2012

CMS scheduling for first collisions https: //twiki. cern. ch/twiki/bin/viewauth/CMS/Collisions. Mar 2012 first 3 x 3 bunches � Tracker First 48 x 48 fill � Timing run Second 48 x 48 fill � Tracker peak mode bias scan 84 x 84 fill � Pixel bias scan � ES at high gain � Tracker delay run L. D. : Tracker status - TPO 22/03/2012

Conclusions and toughts Tracker ready for collisions this year � � � 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 � No problem seen for high pile-up not radiation damage DAQ is always under-pressure DCS is loosing people – going to central support Tracker should survive up to LS 3 On radiation damage: only few people working on it � In INFN there are several experts that could contribute (many participant to RD 50) L. D. : Tracker status - TPO 22/03/2012

Backup L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012

L. D. : Tracker status - TPO 22/03/2012