1. on behalf of the FCAL collaboration
Status of the FCAL sub detectors
Yan Benhammou
on behalf of the FCAL collaboration

2. FCAL Subdetectors (view)
BeamCal
LHCal
LumiCal LHCal BeamCal
LumiCal +Z
Ecal EndCup Plug 2

3. LumiCal
Only z-position changed from 2506 to 2450 mm ( aligned with front of
Ecal-EndCup-Plugin , leaving space in back for Support/Mounting structure)
Internal parameters ( dimensions, granulation ) remain as in ILD_o1_v05
Here is LumiCal_o1_v03 :
Lumical z-begin/z-end : 2450 / mm
(x,y,z)-center : ( 17.6, 0, ) mm
Sensor Inner/outer R : 84/194 mm
thickness : mm
cell_dR : mm
cell_dPhi : radian
offset Phi : 3.75 deg
stagger angle : 3.75 deg
tile gap size : 2.4 mm
services space : mm
Layer thickness : 4.29
R ad. length layer/total : 0.90/27 X0
Tot. 30 layers : X0 3

4. LHcal
Moved toward IP at z-pos = 2680 mm, positioned relatively to Ecal_EndCup_Plugin with clearance 30 mm ( space left for support )
Inner cutout octagonal centered at outgoing beam pipe ( x-cent = 20.4 mm)
Inner radius reduced from 150 to 130 mm, total length 480 mm
Cell size 10x10 mm
30 layers with tungsten absorber ( 3.8 interaction Length in total ) 4

5. BeamCal Summary of Changes
BeamCal graphite shield radius reduced and inserted into LHCal inner bore
with 10 mm radial clearance – first W layer shifted from 3575 to 3195 mm
Inner radius reduced from 20 to 17.8 mm ⇒ 22/4 Strahinja : beam pipe radius reduced to 17 mm (was 18 mm) and merged into the ILCsoft
Clearance between LHCal and first BeamCal tungsten absorber along z is 35 mm
BeamCal graphite shield thickness reduced from 100 to 80 mm
Proportional segmentation of sensors is applied 5

6. Summary Geometry model of FCAL ( positions, internal structure)
is implemented, updated according to new L*
Reconstruction software for LumiCal and BeamCal present
( FcalClusterer Marlin module ) adopted for DD4HEP
Simulations within DD4hep environment and validation
not done – pending
Alejandro Perez simulated 100 bunch crossing of pairs with and without the anti-DID. This simulation didn’t take into account the beam pipe reduction. 6