Reduction of MFT detector planes inner diameter could produce ineterference with the bellows and the beampipe support during the installation phase

Present MFT planes layout

16.5mm

100mm

D=54mm

D=60mm

D=40mm

16.5mm (vertical movement toto be done in less the 40mm-space between two bellow)

Planes betweeen bellows54 mm diameter hole detector plane needs to clear 60mm Bellows diameter (and 60mm diameter BP Al section)

MFT vs ITS

to be compared with CDR radius

200, 220, 410, 430

Outer layers lay-out studiesOption 1

Layers overlap

Overlap azimuthLayer 4=2.25Layer5=2.33Layer6=2.38Layer7=2.31

to be compared with CDR radius

200, 220, 410, 430

Outer layers Geometrical lay-out studiesOption 2

Layers overlap

Overlap azimuthLayer 4=2,11Layer5=2,33Layer6=2,30Layer7=2,32

to be compared with CDR radius

200, 220, 410, 430

Outer layers Geometrical lay-out studiesOption 3

Layers overlap

Overlap azimuthLayer 4=2.19Layer 5=2.33Layer 6=2.31Layer 7=2.31

to be compared with CDR radius

200, 220, 410, 430

Outer layers Geometricallay-out studiesOption 4

Layers overlap

Overlap azimuthLayer 4=2.33Layer 5=2.15Layer 6=2.31Layer 7=2.31

to be compared with CDR radius

200, 220, 410, 430

Outer layers Geometricallay-out studiesOption 5

Layers overlap

Layer 6 & 7

Layer 4 & 5

Layer Nr

Ladder Module Chip x module

Chip x submod

N submod

7 46 92 49x2 7 76 46 92 49x2 7 75 24 48 28x2 7 44 24 48 28x2 7 4

SERVICES WAY OUTA-Side

13

CAGE

MFT

ITS LAYER 4,5,6,7

ITS LAYER 1,2,3

BEAM PIPE

NEW ITS INTEGRATIONSERVICE BARREL

DETECTOR BARREL

TPC OD= 1130mmCAGE OD= 1100mmMFT OD= 1030mmITS OUT BARREL OD= 920mm