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SDHCAL Integration. For SDHCAL the favorite mechanical structure is the one proposed by Henri Videau. No projective cracks neither in F nor in  Distance between Barrel and Endcaps is minimized since all services are on the outer radius of the barrel

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For SDHCAL the favorite mechanical

structure is the one proposed by

Henri Videau

  • No projective cracks neither

  • in F nor in 

  • Distance between Barrel and

  • Endcaps is minimized since all

  • services are on the outer radius of

  • the barrel

  • Limited deformation


Stainless steel

wheel Weight : 88 000 kg

Detectors weight : 36 800 kg

Total weight : 124800


Stainless steel

Ext. Diameter 6715 mm

Int. Diameter 4028 mm

Length 4800 mm

Barrel Weight : 440 000 kg

Detectors weight : 184 000 kg

Total weight : 624 000 Kg


Stainless steel

Module Weight : 44 500 kg

Detectors weight : 21 120 kg

Total weight : 65620 Kg


Stainless steel

Endcap Weight : 178 000 kg

Detectors weight : 84 480 kg

Total weight : 262 480 kg

Mechanical structure needed


Hcal ring

Two options: either the ring is attached to the barrel or to the endcaps.

The first option is more appropriate from the mechanical point of view but it is probably less adequate for inner detector services.

HCAL barrel

ECAL barrel

Endcap

HCAL ring

HCAL barrel

ECAL barrel

Endcap

Hcal Ring


Dhcal
DHCAL the endcaps.

emax = 0.15 mm


Dhcal ecal

g the endcaps.

DHCAL + ECAL

DHCAL + ECAL-8-3

Fixing line

emax = 0.35 mm


Mounting
Mounting the endcaps.

BARREL

Each of the 5 sectors of the barrel will be

built in horizontally

Then using appropriate tooling, wheels will be put

vertically and mounted on the insertion machine

ENDCAPs

The same strategy as for the barrel can be

followed. One possible scenario is to build the

4 quarters separately before to mount them on

the insertion machine

Service cabling will be performed on the insertion

machine.

The best scenario is to perform the mounting in two

steps for the barrel: 2+3 wheels


Insertion machine: the endcaps.

The insertion machine should have a rotating movement so

the cassettes insertion and cabling can be done easily:

Ex: cassette vertical insertion


Services
Services the endcaps.

Services: Cooling, Gas, HV,LV.. To be implemented

from the outer radius for both barrel and endcaps.

They will be taken out though the aperture between

Barrel and endcaps


Integration
Integration the endcaps.

Both barrel and endcaps will be fixed on the corresponding cryosta. Magnetic field

effect on the endcaps is to be taken into account (learning from CMS)


Summary
Summary the endcaps.

  • Groups involved in SDHCAL option are working to

    propose a robust mechanical structure and a

    realistic integration scheme taking into account the

    CMS experience.

  • A lot of work still to be done for the ENDCAPS

  • The services cables of SDHCAL has almost

    no consequence on the ILD simulation


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