atlas id - sct status report

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


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.


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


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


SCT Power & Readout – Optical Harnesses

Dog-leg with opto-package

Critical issues are to check mechanical clearances & electrical performance on barrel sector


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


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.


HV board & back-plane

Partly equipped & under test

Partly equipped; Press-fit technology tested


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


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


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


4 SCT EC outer modules on system test sector


Details of SCT modules on system test sector


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)


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


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


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]


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


Project engineer fixing brackets Dogleg + LM tape sample

Dummy module QA!



Details of the capillary and connections. Tests with evaporative cooling.



SCT Barrel modules – now in production!

Hybrids

Baseboards


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


Qualification module 42 Response (Gain; Offset & Noise extracted from threshold scan)


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.


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


SCT Software - Detector Response

Common Pixel+SCT framework. Good agreement with test beam

data.


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.


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

atlas id - sct status report

Documents

atlas plenary

sct fe power

sct readout daqsct readout

plenary session

sct week valencia

sct modulelm 50resultslv0

linear power supply

afe2000 power packsct