1. Combine Test Beam 2004 SCT Modules in Space Draft
Peter Kodyš

2. Introduction Method Main idea:
To use SCT end cap outer modules in position of barrels in x axis.
Method
Model is written in ROOT program as 3D
Program is fully independent of Athena environment
Standard databases is not used but it is possible to connect to it (not useful now)
This is a way how to compare the right setting of geometry in Athena
Model contain tools for simple digitization, clustering, residual histograms
Changes of geometry or module type are possible and simple
Source code is available on the web:

3. Space Setting
Modules are in pairs with following setting (next page in graphics):
Distance in x (beam direction):
0 (Target), pair, pair, pair, pair (in mm)
Shift in y (vertical):
Lower module: –29.13mm, upper module: mm
Rotations:
Upper module in angle 10deg in rot axes z (horizontal)
Lower module in angle 20deg in rot axes z (horizontal)
Upper module in angle – 2.403deg in rot axes x (beam direction)
Lower module in angle – 4.695deg in rot axes x (beam direction)
Occupated space: 248 x 136 x 170 mm

4. Basic Views
X axis point 0 (red line) is shifted 400mm from target

5. Details In Beam Intersection Point
Parallel beam in mid of detector pair
Detail on top view, red circle check M0 chip and direction of power kaptons to hybrid
Parallel first and last strip (like barrel) in overlap 3 mm

6. Examples Of Histograms
Histogram of hits in module pair (hitmap)
Space residuals on left and right module in pair (different accident angle)
Eta and residuals on detectors in pair, to confirm good statistics

7. Concusions From Pre-Simulations
Left side for module tilted 10deg: space residuals moving
in y: mm
in z: 4.1 mm
Right side for module tilted 20deg: space residuals moving
in y: -0.2 mm
in z: 8 mm
Impossible to use simple spacing from crosing strips in module
Link alignment using in TestBeam needed
20deg titling module will be good example how we eliminate spacing error

8. Simulations - Status Carlos Escobar:
GeoModule visualization of components for checking geometry
Gean4 examples
Zdenka Broklova:
Geant4 examples with joining to digitization
Format of data checking
Peter Kodys:
Instalation of last versions of ATHENA modules (thanks Pavel Reznicek)
GeoModule examples (thanks Grant Gorfine, Thijs)
NOVA database checking of SCT code (nonactual version) (thanks Sasha Rozanov, Pavel Nevski)
NOVA database write new current version of SCT geometry, update olders
NOVA database – prepare combine test beam geometry for SCT
non ATHENA software: make arrangement of CTB in 3D, pre-simulation of tracking, residuals