Download - ATLAS SCT Status Report
AOW 2003 Prague - SCT Report Z. Doležal 116-Sep-03
ATLAS SCT Status Report
Overview of major production issues Silicon sensors & FE ASIC procurement Power & Readout
Power supplies Readout DAQ & DCS
Barrel Barrel modules Barrel Harnesses Barrel Engineering
Endcap Endcap modules Endcap Engineering
Testbeam
Schedule & critical issues
AOW 2003 Prague - SCT Report Z. Doležal 216-Sep-03
SCT silicon sensors procurement
Production & acceptance testing of the silicon sensors is ~ complete
Quality of the detectors is excellent All quantities within specification Hamamatsu barrel detector summary
Very low leakage currents
Typically <200 nA at 500V bias at 20oC
>99.9% good readout strips
CIS detectors: some IV problems
0.2 A # defects
AOW 2003 Prague - SCT Report Z. Doležal 316-Sep-03
SCT ASIC procurement
Post irradiation studies indicate 10years lifetime @ LHC
Production stopped by ATMEL
Use ASICs with 1 ch. out of specs
wherever reasonable (possible): qualification, rework, etc.
Wafers delivered 1053
Wafers accepted (Yield >10%) 798
Yield of the accepted wafers is 26%
Fraction of wafers rejected 24%
Number of die accepted 53K
% of total requirement (61.5K) ~86%
Die with 1 channel out of spec ~24%
AOW 2003 Prague - SCT Report Z. Doležal 416-Sep-03
SCT Readout & Power system
System specification 4088 modules x 1536 channels 6 x 106 readout channels 40 kW power 100 m detector control room
Readout =RODs
48Channels/VME card Pre-series of 7 cards being evaluated
+BOC Optoelectronic Back of crate cards First 10% batch in production Custom Opto-packages in production in
Taiwan
+ TIM Available for assembly
+Crates, backplanes &SBC
+Optical fibres
System status All elements prototyped and ATLAS
PRR completed Readout & power needed for testing
during assembly
Power & Cables =LV0 cards (Prague)
4 channels/card 10% production delivered and burned in
+HV0 cards 8 channels/card 10% production launched
+Backplane, 48V &5V power supplies
+Crate controller, crates
+Patch-panels PP3 with filters & limiters on ATLAS
+Cables 4 types Tender started in August
AOW 2003 Prague - SCT Report Z. Doležal 516-Sep-03
SCT Power system schematic
PS CRATE
PP3 (4088)COMMON MODE CHOKES
VOLTAGE LIMITER
PP2Factory SPLICE
PPB1 orPPF1
PPF0END-CAP ONLY
DETECTORMODULE
(4088)
48 VDC POWER PACK
CC
INT
ER
LO
CK
6 H
V C
AR
DS
12 L
V C
AR
DS
PS CRATE (4)
DCS INTERLOCKMATRIX
DCS VIA CANbus
EARTH TIE Near PP3
SINGLE POINT EARTH
LOW MASSPOWER TAPE
LOW MASS POWER TAPE
TYPE II CABLE
TYPE III CABLE
TYPE IV CABLE
PS RACK (22)
AOW 2003 Prague - SCT Report Z. Doležal 916-Sep-03
SCT Module Design (Endcap)
strip direction
strip direction
4 wedge shape silicon sensors
768 p-in-n strips,single sided
supplied by Hamamatsu and CiS
sensor alignment < 5µm
40mrad stereo angle
SPINETPG bar for heat removal(1700 W/m/K)
AlN wings for mechanical stability
hybrid connected to sensors only by fanins thermal split12 ABCD3TA
binary read-out chips
hybrid:flex circuit on carbon-carbon
AOW 2003 Prague - SCT Report Z. Doležal 1016-Sep-03
SCT Barrel modules
Barrel modules are in production
Barrel module PRR May 01 Silicon sensor production complete May 03 Barrel module PAR May 03
Hybrids complete (target) Aug 03 1214/2500 (49%) Baseboards complete (target) Oct 03 1481/2530 (59%)
Modules-Japan 445/ 786 (57%) Modules-UK 144/ 549 (26%) Modules-US 104/ 483
(21%) Modules-Scand (qualification soon) 31/ 404 ( 8%) Total (2112+5%) 734/ 2218 (33%)
Modules complete (target) Apr 04
Production goal is to complete by Apr 04 with a yield > 90%
AOW 2003 Prague - SCT Report Z. Doležal 1116-Sep-03
SCT Barrel baseboard & hybrid production
Production rate is under control – (recently stalled, but recovered)
AOW 2003 Prague - SCT Report Z. Doležal 1216-Sep-03
SCT Barrel module assembly
Note : Backup slide on s-curves Critical issues:
Get all clusters into production Production yield > 90%
AOW 2003 Prague - SCT Report Z. Doležal 1316-Sep-03
SCT Barrel Optoharnesses
Opto-harnesses are in production Barrel LM tape production complete First 2 batches of 8 harnesses each for Barrel-3 evaluated Start-up delay was caused by ESD damage to DORIC ASIC
& other production issues Start of production recommended
Schedule can be recovered (complete production by the end of 2003)
AOW 2003 Prague - SCT Report Z. Doležal 1616-Sep-03
SCT Barrel Engineering – Support Structure
All 4 CF cylinders delivered …but there are ~40000 small
parts!
B3 delivered to RAL B4,5,6 assembly test starting
AOW 2003 Prague - SCT Report Z. Doležal 1716-Sep-03
SCT Barrel Engineering - Cooling
Design is finalised 48 module units CuNi with soldered joints
Concept tested on sector
Cooling design is evolving; which causes delays
Production is ready to start
AOW 2003 Prague - SCT Report Z. Doležal 1816-Sep-03
SCT Barrel Engineering - Assembly
Assembly phases1. Spindle & service
cagesUnderway
2. FSICompleted
3. Opto-harnessesDelivered
4. CoolingWaiting cooling
5. ModulesModules available
Oxford Assembly site almost ready
4 months late
B3 harness assembly at RAL
AOW 2003 Prague - SCT Report Z. Doležal 1916-Sep-03
SCT Endcap Modules
Modules Endcap module FDR & PRR Aug 02 & Dec 02
Module design was validated as suitable for production Thermal & electrical performance validated
Production Hybrids
Hybrid production & assembly transferred to industry Pre-series of 200 in production 44(+48) delivered, remaining show
delamination problems Full order for 2300 placed (2500 in total)
Spines 229 produced by Protvino/MPI, but with low quality Contract for 2500 issued
Module assembly 3 out of 7 production sites qualified for production 1rst modules within specification Aim is to have all sites qualified in 2 months Target is to complete module production in Dec 04
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AOW 2003 Prague - SCT Report Z. Doležal 2016-Sep-03
SCT Endcap hybrid & module production
CICORELHybrid SA
CERN Cracow
RAL
Freiburg
Geneva/CERN
Melbourne
UK
Valencia
NIKHEF
MPI/Prague
Freiburg
Producer Reception Hybrid QAModule
Assembly
AOW 2003 Prague - SCT Report Z. Doležal 2116-Sep-03
SCT Endcap Modules
Hybrid production is starting – need industry to sort out quality problems and achieve required rate
Spine production is critical Other components are ~ OK (with additional collaboration effort) Rapid cluster qualification is critical Aggressive production plan being developed (see backup)
AOW 2003 Prague - SCT Report Z. Doležal 2216-Sep-03
SCT Endcap Endcap Engineering - Structure
Support structures CF support cylinders & disks
ordered First support cylinder shown
Scheduled delivery Aug 03 Problems with wings which
will cause 3-4months delay
First 4 discs delivered Scheduled completion Dec 03 Again many small parts
AOW 2003 Prague - SCT Report Z. Doležal 2316-Sep-03
SCT Endcap Endcap Engineering - Cooling
Cooling Design is finalised & prototyped Production of cooling circuits ready to
start
Services Harnesses expected now LM tapes & PPF0 prototyped
AOW 2003 Prague - SCT Report Z. Doležal 2416-Sep-03
SCT Testbeam 2002/3 & 2004
Understanding of intrinsic performance of an increasing number of real modules with final components
June 2002, 2 weeks July 2002, 2 weeks August 2002, 2 weeks May 2003, 2 weeks including 25ns measurements September 2003, ~2 weeks; irradiated modules; common DAQ run 2004 – Plans for tracking; common DAQ
AOW 2003 Prague - SCT Report Z. Doležal 2516-Sep-03
SCT Testbeam 2002/3(preliminary)
AOW 2003 Prague - SCT Report Z. Doležal 2616-Sep-03
Example of a second track due to hard interaction with silicon.
SCT Testbeam track finding studies(preliminary)
Example of a track reconstructed in telescope & 4 planes
effic
ienc
y
AOW 2003 Prague - SCT Report Z. Doležal 2716-Sep-03
SCT schedule & Critical issues
Barrel SCT (ready for integration 15/12/04; ID ready 22/05/05) Modules ~33% complete ~3 months delay Full production all clusters
Yield is critical Harnesses ~1% complete ~4 months delay Barrel-3 complete ~3 months late B3 services ~4 months late
B3 assembly start ~5 months late
Endcap SCT (ready for integration 01/03(05)/05; ID ready 16/08(10)/05) Current schedule delivers the Endcaps 2 & 4 months late wrt baseline
Modules Starting production Spines critical Harnesses Started Disc-9 To be delivered now ~4 months late Critical D9 services Most orders placed ~6 months late Critical
D9 assembly start ~5 months late
Power, Readout & cables are OK for the experiment but critical for use during assembly
AOW 2003 Prague - SCT Report Z. Doležal 2816-Sep-03
Invitation For The Lab Tours
A Strip Detector Lab - Institute of Physics AS
Strip detectors for ATLAS LVPS
SCT Lab - Charles University End Cap Module Production
B Semiconductor Lab - CTU, IEAP
End Cap Module Production
AOW 2003 Prague - SCT Report Z. Doležal 2916-Sep-03
Backup - SCT ABCD Yield
ABCD Wafer Test Results
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
(New EPI Starts at Z40859; Fabrication Pause between Z41183 and Z43160.)
Yield of Accpeted Wafers
Percentage of Wafers Returned
Yield Guarantee
AOW 2003 Prague - SCT Report Z. Doležal 3016-Sep-03
Backup - SCT Barrel Hybrid (Pitch adaptor problem)
2500 hybrids are required to produce the 2112+5% barrel modules As of June 1st, 1333 hybrids have been produced; Of these:
~ 200 have problematic pitch-adaptors . First problems were seen at about hybrid number 400, and then again after about hybrid 1200.
The problem is in the Aluminium metallization (on glass substrates). The 2nd encounter was very severe and the vendor could not reproduce
the previous good metallization even after numerous trials.
An alternative vendor has been identified and the quality of the PAs is being cross-checked by barrel clusters before resuming production.
Although the delivery of hybrids had stopped for 2-3 months, the hybrid production excluding the last PA attachment has continued .
Once the PA production is on track, the hybrid delivery will be much faster.
AOW 2003 Prague - SCT Report Z. Doležal 3116-Sep-03
Backup - SCT Module s-curves The SCT uses binary electronics and is calibrated using threshold scans i.e. the occupancy is
measured as a function of the threshold level. With no injected charge this gives the noise occupancy Charge injection via a calibration capacitor gives efficiency
On some fraction of the modules the noise occupancy curves below the operating point of 1fC have ‘distorted s-curves’
No significant differences seen in modules between standard modules and those with distorted s-curves. All noise occupancy values are more than factor 10 less than the specification
All ASICs Module Average
Link 0 average Link 1 average
Log(Occupancy) at 1fC (83 ref modules)
All ASICs Module Average
Link 0 average Link 1 average
Log(Occupancy) at 1fC (25 distorted-s modules)
AOW 2003 Prague - SCT Report Z. Doležal 3216-Sep-03
SCT Endcap Module Production Plan
Module Production
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Inner - Freiburg (H)
Inner - Freiburg (C)
Inner - NIKHEF
Inner - UK
Middle - VLC (short)
Middle - MPI (short)
Middle - Valencia
Middle - UK
Middle - MPI
Outer - Melb.
Outer - Geneva
Outer - Valencia
Outer - UK