Status of ATLAS & CMS Experiments Atlas S.C. Magnet system Large Air-Core Toroids for µ Tracking 2Tesla Solenoid for inner Tracking (7*2.5m) ECAL & HCAL outside Solenoid Solenoid integrated in ECAL Barrel LAr cryostat 42m Long, 22m Diameter, 7 000Tons CMS S.C. Magnet system Long 4Tesla Solenoid for Tracking (13*6m) µ system in return iron First µ just after Solenoid (max. sagitta) ECAL & HCAL (mostly) inside Solenoid 22m Long, 15m Diameter, 14 000Tons
Status of the ATLAS S.C. Magnet system The solenoid construction is well on schedule, major milestone achieved end of 1999 with the cold mass production completed Finished coil recently mounted on final inner LAr cryostat cylinder for full functional test at KEK Solenoid due at CERN Jan 2002 for final integration and tests Solenoid coil on dummy inner LAr cryostat cylinder fall 99
Status of the ATLAS S.C. Magnet system B0 Barrel Toroid (9*5m vs 25*5m long) Arrived at CERN early October Comprehensive test program to July 01 B0 has allowed identifying, and solving critical engineering & fabrication issues Redesign of coil casing & qualification of technology are now completed
Status of the ATLAS S.C. Magnet system First BT coil casing will be delivered by July 2001 SC coil production is ongoing The Barrel Toroid is on critical path since is first component in ATLAS detector assembly sequence With the best current knowledge, the last BT coil of the BT delivery leaves no float with respect to the schedule for assembly First impregnated double pancake BT coil
Status of the ATLAS S.C. Magnet system End-cap Toroids Vacuum vessel and cold mass contracts are proceeding according to plan Fabrication has started Delivery of first vac.. vessel expected July 01 the corresponding cold mass by Dec. 01 End Cap Toroid vacuum vessel fabrication
Status of the CMS Solenoid magnet The Solenoid coil is about 13m long, and 6m in diameter Inside it are contained Tracker, ECAL and HCAL The Barrel yoke consists of 5 wheels each subdivided into 3 layers The End-Cap yokes each consist of a set of 4 disks
Status of the CMS Solenoid magnet Barrel yoke construction completed End-Cap yoke 50% completed YB-1 Barrel yoke Photogrammetry YE-1 End-Cap yoke Photogrammetry
Status of the CMS Solenoid magnet All major contracts for the SC coil production have been placed 2nd delivery of SC strands, first full length (2.65km) Rutherford cable wound, Dummy insert (2.65km) produced. The SC coil schedule, based now on contractual dates, shows a five month delay (in the shadow of underground area delivery) First Magnet Test on surface by April 2004
Status of ATLAS & CMS Pixel Vertex Systems The region below 20cm is instrumented with Silicon Pixel Vertex systems Oxygenation of the bulk silicon reduces V bias required for efficient operation The Pixel area is driven by FE chip Shape differently optimized for resolution ATLAS ~ 50 * 400 µm 2 CMS ~ 150 * 150 µm 2 With this cell size occupancy is < 10-3 IP trans. resolution ~ 20 µm for tracks with P t ~ 10GeV Due to high fluence sensors are n-on-on, (p-stop or p-spray to isolate pixels) rate (arbitrary units) 1200 1000 800 400 200 0 depletion 10 15 oxy 600-3 600 400 360 bias voltage (V) Not-Oxy 280 240 200 160 120 80 3.2 10 14 40 Oxy 0 oxy2 notoxy1 geb15 Sensor technology, despite being sophisticated, is under control oxy3
Status of ATLAS & CMS Pixel Vertex Systems Module hybridization is well advanced (including high yield bump-bonding) Both collaborations have developed FE chips with full functionality (or close to it) Reliable rad-hard implementation is critical Honeywell SOI no longer available Unexpected problem with DMILL: requires re-design of the ATLAS circuit concerns a feature not used in CMS design (submitted Aug. 00, results awaited) ATLAS plans 0.25µm m submission for June 01 CMS is also considering this Schedule ok for CMS: Pixel can be installed last (and extracted regularly for maintenance) Original ATLAS scheme required early installation New scheme in development to allow independent insertion, and ease maintenance
The ATLAS Inner (Tracking) Detector The region 60 < R < 110cm is instrumented with a Straw Tube tracker which provides ~ continuos tracking and incorporates Transition Radiation detectors, for electron identification (TRT) The region 25 < R < 55cm is instrumented with a Silicon Strip tracker (SCT) The SCT has active area ~ 60m 2 and provides at least 4 stereo hits (in addition to 3 pixel hits) The sensors are single sided p-on-n with Integrated AC coupling & PolySi bias They are fabricated on 4 wafers Silicon sensors are arranged back-to-back at a stereo angle within a module There are 4 Barrel layers and 2*8 End-Cap Disks
Status of Atlas Silicon Tracker (SCT) Sensor pre-production is now completed Release of production is well under way PRR for 80% of the production passed Need to demonstrate single component performance is retained in complex system Pre-production FE chips under test Modules finalized & Pre-series module production is under way Large scale electrical system verification underway, study various grounding & shielding configurations with encouraging results
Status of Atlas Silicon Tracker (SCT) No excess noise for Barrel (sub)sector with respect to single module operation Mechanical structures now well advanced/finalized, detailed optimization of local cooling & services integration are converging
Status of Atlas Transition Radiation Tracker (TRT) Primary straw tube production is completed The straw reinforcement process is under way Aging ok, provided no H 2 O in gas DMILL FE ASIC successful, but expensive further electronic system tests a high priority Barrel Module production is under way End-Cap Module 0 now completed & measured Emphasis now on production start-up EC disk production is organized so that inner disks will be completed first, since outer-most disk may be staged if production delays are incurred
Status of CMS Silicon Strip Tracker (SST) CMS SST consists of about 20 000 modules with over 220m 2 of active area, instrumented with about 10 7 channels It provides at least 10 hits, 4 of which have stereo The CMS SST exploits 6 technology As well as automated module assembly procedures and vastly improved wire-bonding machines
Status of CMS Silicon Strip Tracker Efficient & clean track reconstruction is ensured provided occupancy below few % P t / P t ~ 0.1*P t (P t in TeV) allows to reconstruct Z to µ + µ with m Z < 2GeV up to P t ~ 500GeV Twelve layers with (pitch/ 12) spatial resolution and 110cm radius give a momentum resolution of p p pitch 1.1m 0.12 100µ m L 1 2 4T B 1 1 p Tev At small radii need cell size < 1cm 2 and fast (~25ns) shaping time This condition is relaxed at large radii A typical pitch of order 100µm is required in the phi coordinate Strip length ranges from 10 cm in the inner layers to 20 cm in the outer layers. Pitch ranges from 80µm m in the inner layers to 200µm m in the outer layers
Status of CMS Silicon Strip Tracker Strip length ranges from 10 cm in the inner layers to 20 cm in the outer layers. Pitch ranges from 80µm m in the inner layers to 200µm m in the outer layers Occupancy vs radius Pt/Pt vs η for 1GeV < Pt < 1 TeV
Status of CMS Silicon Strip Tracker APV25 chip: 0.25µ 0.25µm ready for production Strip capacitance ~ 1.2pF/cm for w/p = 0.25 Independent of pitch and thickness Insensitive to irradiation for <100> crystal Radiation insensitive Excellent noise performance 2000 1600 closed symbols: peak mode: 270 + 38/pF open symbols:deconvolution: 430 + 61/pF Use 320µ 320µm thick Si for R < 60cm, Lstrip ~ 10cm Use 500µ 500µm thick Si for R > 60cm, Lstrip ~ 20cm 1200 800 chan 2 chan 43 chan 107 400 0-10 -5 0 5 10 15 20 25 Expected S/N after irradiation S/N ~ 13 for thin sensors, short strips S/N ~ 15 for thick sensors, long strips Status of ATLAS & CMS Experiments Aspen 2001
Status of CMS Silicon Strip Tracker Silicon sensor design finalized Tendering procedure started Detailed optimization of local cooling & services integration converging Module and support mechanics are well advanced/finalized: EDR passed Nov 00 Pre-production of 200 module 0 s underway Procurements and fabrication to start in early 01
Status of CMS Silicon Strip Tracker D A Q L1 Counting room Clock FED FED TTCrx TTCvi TTCmi TTCrx FEC Analog opto link Digital opto link Beam area APV CC U + PLL Opto to LVDS APV CC U + PLL APV CC U + PLL APV CC U + PLL Successful system test in LHC-like beam with mix of final/prototype elements of full read-out chain, analogue opto-link, ctrl Next is full final component system test, June 01 prior to release of electronics & module production