1. Status: The DBD 3D CAD model on CATIA is frozen
Now, starting a new CAD version with update
LAL collecting all informations from collaborators
(3D model, services placeholders..)
for example: in june 14 SDHCAL update design sent by LPNL
Brainstorming group, start to work on an update of the ILD detector model: Karsten Buesser (DESY) ; Henry Videau (LLR) ; Roman Poesch (LAL) ; Alexandre Gonnin (LAL) ; Christian Bourgeois (LAL)
In parallel each submodule teams continue to work on their own design.
First modification:
Reduce the distance of the L* to the IP : ask to reduce less than 4m
Actually : 4,5m
Lot of consequences…

2. Reduction of the distance between of the L* to the IP
Inner beam studies:
Need to approach the QD0 near to IP:
move the vacuum pump putting before the QD0
Need vacuum simulation -> vacuum teams from DESY and LAL
Reduce the thickness of LHCAL ? …
The length and diameter of the experience could change.