DT stato programmi futuri U Gasparini Univ INFN

DT: stato & programmi futuri U. Gasparini Univ. &INFN Padova Roma 15/7/2010 …e finalmente… …siamo partiti…: 15/7/2009 U. Gasparini, Incontro con i Referees 1

Sommario - Stato e “highlights” sulle attivita’ - Continuazione run 2010 e punti critici - Maintenance / ”consolidamento” → verso l’ upgrade SLHC - Richieste , Mo. FA/B, … 15/7/2009 U. Gasparini, Incontro con i Referees 2

Stato DT - da fine marzo le DT hanno operato in modo stabile, con dead-time ~ 0. 1 % - 0. 45% dead channels overall CMS downtime (last month): ~ 15% - il local trigger delle camere funziona, dopo il necessario “tuning” iniziale, come atteso 22/7/2009 3

DT local trigger Efficiency to deliver trigger primitives in the chambers : Open circles: startup configuration Full circles: new config. &timing (after ~20 nb-1 of data taking) 22/7/2009 U. Gasparini, Incontro con i Referees 4

DT trigger (II) Efficiency to deliver a muon candidate to the Global Muon Trigger ~15% increase @ 5 Ge. V/c, same (low) level of ghosts 22/7/2009 U. Gasparini, Incontro con i Referees 5

DT trigger: BX identification still some optimization work on timing needed in external stations (MB 4) U. Gasparini, Incontro con i Referees

Global muon tracking (Tracker+DT) - Good understanding of muon h, p. T spectra - Good sensitivity to J/y (~1000/nb; mass scale dominated by Tracker)

Alignment Comparing hardware alignment measurements with track-based alignment : Corrections to DT chamber position Vs Tracker s~ 1. 3 mm in each wheel , trend vs wheel under investigation 22/7/2009 U. Gasparini, Incontro con i Referees 8

Operations (run 2010 &beyond) - Web-based monitoring tools developed: allow running with 2 on-call shifters + 2 experts not continously at P 5 shift man-power reduction 22/7/2009 U. Gasparini, Incontro con i Referees 9

Example: DT DQM Powerful tool full Integrated In global DQM (next slide. . ) 22/7/2009 U. Gasparini, Incontro con i Referees 10

DT DQM (II) Example: On-line monitoring of local reco quality: cm Hit multiplicity Residuals (as seen @ HLT) time # of segment / lumi section Detector overview

run 2010/2011 - Il rivelatore e’ stabile e affidabile; tuttavia il suo running richiede un expertise notevole; Shifts: L’ esperienza CRAFT (Run cosmici 2009) e soprattutto dei due primi mesi di run (Aprile-Maggio) ha permesso di mettere a punto una strategia che prevede 2 on-call DT shifter (+ 1 on-call expert che copre le diverse competenze detector/DAQ/trigger) Expertise/ “key persons”: - propagazione dell’ expertise necessario per le persone on-call ben avviato; - buon livello della documentazione esistente - training sessions organizzate ~mensilmente - ampliamento della platea di “experts” (transizione “on-call” shifters-> “on-call experts” ) 22/7/2009 U. Gasparini, Incontro con i Referees 12

DT maintenance Upgrade of Mini. Crate comunication system (secondary link): MC communication Primary serial link -> optical fiber Secondary serial link -> RS 485 copper chain The UXC-USC link for half wheel is slow, 38. 4 Kbps Often 485 boards lost communication with DCS. Recovering requires cycling on/off the SC crate Proposed new configuration with new 485 boards, Maximizing USC-UXC communication speed (230 Kbps) Request: 15 keuro in 2011 (Sez. di Padova)

DT upgrade Problema: come garantire il run del detector fino al 2030 (? ), in conformita’ coi piani CERN per LHC/SLHC n Punti critici: u Obsolescenza dell’elettronica - spares di parti prototipate nel 1995 indisponibili nel 2020… “consolidation program” avviato (next slides) u Disponibilita’ dei progettisti originari su tempi lunghi - per modifiche senza stravolgimenti di un sistema complesso

DT “consolidation” Trigger Board replacement in q view: MOTIVATION - BTIM mortality was high during production tests (25% spares to 3% spares). - TRB failure rate was high (1%) during commissioning phase (thermal stress? ). The rate seems to have lowered down and it needs to be totally understood during steady operation. PROPOSAL: *BTI was produced in now obsolete ATMEL 0. 5 um technology. *We are investigating the migration to FPGA (optimizes production timescale and leaves space for possible modifications), which can also be moved to an ASIC production later if desired. *The present plan is to replace THETA TRB with the newly produced FPGA-based ones and use the removed boards as source of spare BTIMs to be used to repair failing PHI TRBs. *The actual implementation program will depend on the shutdown plans but we estimate that all boards of one MBX can be replaced in 6 months. *Present proposal is to replace all boards in one full station (i. e. MB 3) by 2015: Schedule (details under discussion) 22/7/2009 2010 2011 2012 -2013 2014 -2015 Production of 2 prototype boards Bench tests and decision about the replacement strategy Mass production and test Installation Decision about strategy in view of high luminosity operation U. Gasparini, Incontro con i Referees 15

DT “consolidation” (II) THETA TRB REPLACEMENT Present situation: • ACTEL Pro. Asic 3 identified as best device in terms of radiation tolerance • Working prototypes of BTI algorithm inside the device have been qualified through test vectors • Studies of number of BTIs/device are on going. • At present 2 BTIs/ACTEL is feasible in terms of timing => 16 devices/TRB • 3 BTIs/ACTEL done but timing not yet correct (76 MHz vs 80 MHz) • A prototype board is being developed to understand possible problems. • Some concerns about higher power consumption under study Richieste: ulteriori sviluppi prototipo scheda trigger 20 keuro consumo 2 keuro licenze sw 22/7/2009 U. Gasparini, Incontro con i Referees 16

Upgrade “fase 1” Altri possibili interventi sono in discussione: - spostamento in USC delle trigger Sector Collectors board - modifiche DT track finder + studi dettagliati su possibile L 1 trigger DT+Tracker “phase 1” Upgrade TP in preparazione; Draft in Settembre (*) Report / discussione in Autunno * now postponed to 2016

Studi SHLC Sviluppo simulazioni dettagliate per SLHC (High luminosity): studi di nuovi algoritmi per L 1 trigger di muoni DT+Tracker 10 Ge. V muons Fraction of muons passing L 1 trigger present CMS Muon trigger new algos Tracker-upgrade geometry used 50 Ge. V muons

Richieste Finanziarie 2011 In aggiunta: Licenze sw: Bo 5, 5 ke Pd 2, 0 ke 22/7/2009 U. Gasparini, Incontro con i Referees 19

Richieste finanziarie: Mo. A DT Mo. A fraction @CERN: 55% 22/7/2009 U. Gasparini, Incontro con i Referees 20

Mo. A breakdown 22/7/2009 U. Gasparini, Incontro con i Referees 21