CONFIGURATION OVERVIEW

Overview of Configurations (June 2021)

• Location: IP6, IP8

• Configuration: 1.5T (ECCE), 2.0T (CORE), 3T (ATHENA)

• Location of EEEMCAL: inside or outside DIRC

Location and number of radiator modules

• ATHENA:

• z = 195cm
• R_in = 11 cm (eta ~ -3.5) = R_min_PWO
• R_max_PWO = 53cm (eta ~2) = R_min_Glass
• R_max_total = 100 cm (eta ~ 1.4) = R_max_Glass

• Modules PWO = ~ 2200 (2 x 2 x 20 cm3)
• Modules Glass = ~ 1400 (4 x 4 x 40 cm3)

• Total weight: ~ 2400 kg

• If assume all PWO for this volume: 7600 PWO modules

• Weight ~ 7000 kg

• ECCE:

• z = 190 cm
• R_min = 11cm (eta ~3.5) = R_min_PWO
• R_max_PWO = 49cm (eta ~2) = R_min_Glass
• R_max_total = 57 cm (eta ~1.9) = R_max_Glass

• Modules PWO = 1680 (2 x 2 x 20 cm3)
• Modules Glass = 160 (4 x 4 x 40 cm3)

• Total weight: ~1500 kg

• If assume all PWO for this volume: 2960 PWO modules

• Total weight ~ 2000kg

• CORE

• z = 110cm
• R_min=8.5cm
• R_max=47cm

• Modules PWO = 1412 (2 x 2 x 20 cm3)

• Total weight ~ 1000kg

Mechanical aspects

• Maintenance

• Detector maintenance will be done outside the hall using the mechanism illustrated in these videos:

• Link to IP6
• Link to IP8

• How many parts of the detector?

• One part EEEMCal (Athena and ECCE)

• Must we take out the detector?

• All major maintenance will be performed outside the hall

• Where will the detector be mounted?

• On the universal ("DIRC") frame for both Athena and ECCE

• What is keeping the crystals/glass blocks in place?

• Carbon structure between crystals (individual or matrix) - need to know what minimum thickness is required mechanically.

• Where is the detector located?

• Inside DIRC for both Athena and ECCE
• Detector location in z: z=195cm (Athena), z=190cm (ECCE)
• Detector dimensions:

• Athena: Rmin=15cm, Rmax=100cm
• ECCE: Rmin=11cm, Rmax=57cm (support radius=61cm)

• Cooling:

• Need to have as much active area (crystal/glass) as possible to minimize gaps in physics coverage
• Prefer a cooling solution from back and "inside" to minimize any structure outside the crystal/glass block outer radius