Inner Detector Material Description

Stephen Haywood Rutherford Appleton Lab

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StatusI thought we were in good shape – various people have worked on

Material Description over the years.

Pixels: Complete in Pixel Tracking volume; need Services from PP0 to PPF1 (|

| > 2.0)

SCT: Complete up to and including PPF1

TRT: Complete up to and including PPF1

Beampipe: OK – although could be improved by merging 2 layers into 1

https://twiki.cern.ch/twiki/bin/view/Atlas/InDetGeometryUpdate

18 Mar 2009 Stephen Haywood – Simulation WG

PP0 PPF1

3Stephen Haywood – Simulation WG18 Mar 2009

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SCT

Stephen Haywood – Simulation WG18 Mar 2009

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Beyond PPF1 ?This is an ID Responsibility (rather than Pix/SCT/TRT) and is outside

the ID volume.

Was being looked at by a student (from LAr).

There is a note: ATL-LARG-INT-2009-002

Several of us have looked at this note and cannot understand what has been done.

The SCT (EC) PPF1’s & Heaters were implemented.

There is the possibility that TRT PPF1’s were implemented twice (?!?).

Some Cables/Pipes may have been implemented ....but unclear.

Author has left ATLAS.

In retrospect, not obvious where info was coming from and who was in charge.

I have very little confidence in what has been done.Stephen Haywood – Simulation WG18 Mar 2009

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Critical area is PPF1 (triangular section in drawing)Don’t have all Patch Panel numbers!- S. Haywood has provided numbers for SCT end-cap

(34501.65 g). Thanks!- Don’t have Pixel and TRT so made a guess based on

number of cables with respect to SCT!

Material distribution for ID services in PPF1

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What now ?

Andrea Bocci needs to understand status of TRT PPF1.

I need to speak to Sigi Wenig and Andrea Catinaccio who were responsible for ID Services.

Adele asked for Eng Drawings ... Do you really want these ?

Who will implement ID Services ? I assume ID !

If we want to improve model of Beampipe (not obvious that it is necessary), Grant would like some help.

18 Mar 2009 Stephen Haywood – Simulation WG