prepared by M. Tyndel, ATLAS Plenary Jun 2002 1
ATLAS ID - SCT Status Report
Highlights from SCT week Valencia 13-18 June Procurement of sensors & FE ASICs Power & Readout
Optical Harness Power supplies Readout & DAQ
Endcap modules & assembly Endcap Engineering Endcap Modules
Barrel modules & assembly Barrel Engineering Barrel Modules
Software Schedule & critical issues
prepared by M. Tyndel, ATLAS Plenary Jun 2002 2
SCT Procurement – silicon sensors
Production & acceptance testing of the silicon detectors is ahead of schedule
Delivery will be completed this year (including an allowance for losses during assembly.
prepared by M. Tyndel, ATLAS Plenary Jun 2002 3
SCT Procurement – FE ASICs
Production & acceptance testing of FE ASICs is well advanced
Yield is lower than hoped for but acceptable ~26%
Agreement has been reached with ATMEL regarding radiation QC.
Need to purchase spares this year
prepared by M. Tyndel, ATLAS Plenary Jun 2002 4
SCT Power & Readout – Optical Harnesses
8 pre-series barrel optical harnesses are in production Barrel harness =
Patch-panel (designed) Low mass tape (in production)
• Kapton changed to 50m• Problems with soldering now
understood• Yield ~85%
Optical fibre (purchased) Doglegs (in production) Optopackages (in production)
• 64 produced (see fig)
Endcap harnesses use the same components & production will start later this year
Critical issues are to check mechanical clearances & electrical performance on barrel sector
prepared by M. Tyndel, ATLAS Plenary Jun 2002 5
SCT Power & Readout – Optical Harnesses
Dog-leg with opto-package
Critical issues are to check mechanical clearances & electrical performance on barrel sector
prepared by M. Tyndel, ATLAS Plenary Jun 2002 6
LV&HVcrateLV&HV
crateLV&HVcrate
LV&HVcrateLV&HV
crateLV&HVcrate
LCS
DCS LCSUSA15
44 crates11 racks
US1544 crates11 racks
CANbus
CANbus
SCT FE Power, Detector Bias & services
prepared by M. Tyndel, ATLAS Plenary Jun 2002 7
SCT FE power, Detector Bias & services
Full system specification exists – with details of all services and patch-panels
Prototype SCTLV0 card (4Ch) under evaluation (see fig). Performance meets requirements
Full crate (48 Ch) of low voltage and detector bias is planned before the end of 2002
prepared by M. Tyndel, ATLAS Plenary Jun 2002
8
Test of the LV0/4 channels with AFE2000 power pack
SCT week, Valencia, 17.06.02. Plenary Session, J.Bohm, Prague AS
Test with actual SCT power linesCable resistance: 3.4-3.68 Ohm
LV0/4ch PP3
Ferrite chokes
PP2
Connectors
PP1B
60-120mType 4
30mType 3
9mType 2
SCT module
LM 50µ
ResultsLV0 with AFE2000 and LV3-VME gave the same results (1-2%)AFE2000 and linear power supply 48V are well comparable (1%)Noise is decreasing with increasing load of AFE2000Start-up procedure worked wellFirst test with actual SCT power line was successful;Cable resistance agreed with calculated one.
prepared by M. Tyndel, ATLAS Plenary Jun 2002 9
prepared by M. Tyndel, ATLAS Plenary Jun 2002 10
HV board & back-plane
Partly equipped & under test
Partly equipped; Press-fit technology tested
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SCT Readout & DAQ
SCT Readout = RODs
4 prototypes being evaluated Expect pre-series of 9 x 48 Ch by end of 2002 for use during
assembly + BOCs
Back of crate cards which convert opto electronic Prototypes being evaluated Custom opto-packages produced in Taiwan
+ TIMs Prototypes exist have been produced and are being
evaluated. Hope for info from Dick Jared + Crates & SBC
Production of readout (& power) is critical as it will be used during assembly
prepared by M. Tyndel, ATLAS Plenary Jun 2002 12
SCT Endcap Engineering – Support structure
Design of the carbon-fibre support cylinders & support wings is complete and tender is about to be launched
Tender for the carbon-fibre disks is complete and the order about to be placed.
The module cooling and mounting scheme (consisting of Carbon-carbon blocks with a “wiggly” 70micron Copper Nickel cooling pipe has been prototyped & tested on the evaporative cooling rig.
Design of the “on-disk” services and patch-panels is final and being prototyped.
A critical measurement is to validate the new K5 module with the final support & cooling structure
prepared by M. Tyndel, ATLAS Plenary Jun 2002 13
SCT Endcap modules
Problems with the stability of the EC module have been fixed. Hybrid has been re-designed and manufactured (K5) 16 modules (inner, middle, outer) have been built
16 have had performance measurements in the lab & are stable 7 have been measured in testbeam 6 have been measured in system test 2 have been irradiated
Modules were built built (rapidly) in 5 sites K5 modules can be built reliably inside specs & on required time-scale Electrical performance is within specification pre-irradiation See the same performance in the lab and system without noise
injection More work needed to optimise immunity to noise injection
prepared by M. Tyndel, ATLAS Plenary Jun 2002 14
4 SCT EC outer modules on system test sector
prepared by M. Tyndel, ATLAS Plenary Jun 2002 15
Details of SCT modules on system test sector
prepared by M. Tyndel, ATLAS Plenary Jun 2002 16
Noise measurement results of EC System Test
2 middle and 4 outer modules measured on the system test disk Ned‘s grounding scheme no significant difference between individual and collective operation
common mode noise below 150 electrons on any chip (to be added in quadrature)
prepared by M. Tyndel, ATLAS Plenary Jun 2002 17
Electrical Performance after Irradiation
2 outer modules irradiated in May, 6 days RT annealing, then testbeam
First results do not meet specification: Post irradiation gain is low ~30mV/fC
Repeat measurements and compare with barrel; check effects of annealing
Median charge collected is low ~ 2.7fC Check that detector is fully depleted; check effects of annealing
Noise is high ENC~2300e Repeat in same test setup as barrel;check effects of annealing
Results are preliminary & will be checked before FDR; 2 more modules will be irradiated
prepared by M. Tyndel, ATLAS Plenary Jun 2002 18
Thermal Performance of SCT EC modules
3 modules thermally cycled: no significant change in mechanical or electrical properties grease contact
Reproducibility checked on 4 modules
First thermal measurements on 1 middle and 1 inner module (non-irradiated.) agree with simulation at 10% level From simulations a cooling block temp. <-13°C is required
First measurement of CC blocks on CuNi pipe and evaporative cooling show that this requires coolant at –24°C Again measurement needs checking
prepared by M. Tyndel, ATLAS Plenary Jun 2002 19
Next steps SCT EC module
Complete measurements on irradiation, cooling and grounding issues
Document design & measurements for an FDR in Jul/early Aug
Anticipate PRR in Oct/Nov when: Open issues are understood Results from hybrid tender are available [In the meantime have ordered 100 hybrids to test industrial
hybrid assembly and provide parts for module assembly commissioning and site qualification]
prepared by M. Tyndel, ATLAS Plenary Jun 2002 20
SCT Barrel Engineering
Procurement of the support structure is proceeding well B3 delivery to CERN 28.6.02 B6 delivery to CERN 07.8.02 B5 delivery to CERN 10.9.02 B4 delivery to CERN 15.10.02
All support, cooling and assembly is being validated on 48CH sector 48 channel cooling unit with blocks & manifolds Brackets Harnesses – check clearances
Problems encountered with metallurgy of thin wall CuNi pipes. Needs to be understood before assembly can start
Decision taken to increase the module tilt angle from 10 deg to 11 deg on B3 with an increase of R from 299 to 299.5mm
B3 module assembly will start in Oxford early 2003
prepared by M. Tyndel, ATLAS Plenary Jun 2002 21
Project engineer fixing brackets Dogleg + LM tape sample
Dummy module QA!
SCT Barrel Engineering
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Details of the capillary and connections. Tests with evaporative cooling.
SCT Barrel Engineering
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SCT Barrel modules – now in production!
Hybrids
Baseboards
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SCT Barrel modules
Module assembly sites Japan
Qualified (5 modules in spec) 40 production modules
UK-B Qualified (5 modules in spec) Production starting
USA Qualification in progress
SCAND Qualification in progress
Goal is to complete module assembly by end 2003
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Qualification module 42 Response (Gain; Offset & Noise extracted from threshold scan)
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SCT software
Main areas of activity. Producing simulated byte stream. (J. Schieck) QA for Data Challenges (J. Schieck) Filling detector description information for Event Data
Model for reconstruction. (A. Fornaini + G. Gorfine) Getting accurate detector description. Producing
detector description for new software. Maintenance of G3 simulation. (G. Gorfine + J. Pater)
Simulation/checking of detector response i.e. digitization. (S. Gadomski)
Passive material in inner detector for reconstruction (C. Hansen)
(Also alignment and test beam work.) “In good shape for meeting requirements for DC 1/Phase 2”. … but need more people to get involved with both SCT
specific software as well as common inner detector items.
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SCT Software - Detector Description in AGDD
Full SCT detector written in Compact XML. Compact XML basically contains
primary numbers and there is C++ code to interpret these numbers.
Now close to G3 geometry. Currently verifying local to global transformations.
Validation of G4 Geometry built from AGDD. Material comparison between G3 and
G4 Material comparison with engineering
Weight comparison
Simulation
Engineering
SCT 340 kg 394 kg
prepared by M. Tyndel, ATLAS Plenary Jun 2002 28
SCT Software - Detector Response
Common Pixel+SCT framework. Good agreement with test beam
data.
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Quality Assurance for Data Challenges
Aim: Validate DC sample productions by
insuring reproducibility at different sites.
Provide tool to test similarity of samples produced under different conditions (such as different sites).
Procedure: Track quality cuts Compare efficiency Get pull of track parameters
(Ao,zo,o,cot(),1/pT) Compare with ‘default’ sample.
prepared by M. Tyndel, ATLAS Plenary Jun 2002 30
SCT schedule & Critical issues
Considerable progress in many areas over the last year
Production of the barrel is underway.
Procurement of most EC components underway
Critical items: The metallurgy of thin wall CuNi pipes used for evaporative
cooling. Start-up of EC module production
New schedule and project plan in preparation to match revised LHC and TC integration schedule
The endcaps will be produced sequentially
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