EIC Geometry
Thu, 23 Jun 2022 17:29:41
EIC Detector Geometry
Interaction Point 6
Region Component Sub-Component WBS Length
(cm)		 Inner
Radius
(cm)		 Outer
Radius
(cm)		 Offset
from
Center
(cm)		 Physical
Start
(cm)		 Physical
End
(cm)		 Volume
(m3)		 Weight
(kg)		 Technology Notes
HADRON
DIRECTION
END CAP		 Hadron Calorimeter 6.10.06 171 30 267 328 499 328 33.61 215,210 FeSc, WSc last segment Tower size: 5cm x 5cm x 140cm, 20cm readout
Offset: measured from face nearest to interaction point
Volume: calculated as cylindrical volume minus the volume of the embedded ECAL
Weight: estimated as 79% iron and 21% plastic
Electromagnetic Calorimeter 6.10.05 38 30 190 328 366 328 4.20 27,165 Pb/Sc Tower size: 1cm (1.65cm) x 1cm(1.65cm) x 37.5cm, 5cm readout
Offset: measured from face nearest to interaction point
Weight: estimated as 85% lead glass and 15% steel
Service Gap 8 320 328 320 Offset: measured from location nearest to interaction point
CENTRAL
DETECTOR		 Barrel Hadron Calorimeter 6.10.06 640 267 0 320 -320 72.60 464,834 FeSc Offset: measured from center of detector
Volume: calculated as sum of the sub-sections
Weight: estimated as 79% iron and 21% plastic
HD Section 170 194 267 150 320 150 17.97 Offset: measured from face nearest to interaction point
Central Section 300 180 267 0 150 -150 36.65 Offset: measured from center of detector
LD Section 170 194 267 -150 -150 -320 17.97 Offset: measured from face nearest to interaction point
Dual RICH 6.10.04 100 10 180 280 180 10.29 1,911 Aerogel/Gas Offset: measured from face nearest to interaction point
Volume: calculated as sum of the sub-sections
Weight: based on parametric estimate from CLAS LTCC
Detector Section 80 10 195 200 280 200 9.53 Offset: measured from face nearest to interaction point
Aerogel Section 20 10 110 180 200 180 0.75 Offset: measured from face nearest to interaction point
Solenoid Magnet 6.10.07 384 142 177 0 192 -192 13.47 45,956 Solenoid Weight: based on parametric estimate from CLEO II
EMCal Outer Support 445 134 141 -30 192.5 -252.5 2.69 4,225 Steel, Instrumented Weight: calculated as 20% of total volume as steel (balance is air)
EMCal Outer Surface 480 133 134 -45 195 -285 0.40 1,091 Aluminum Weight: calculated as 100% Aluminum
EMCal Electronics 480 125.5 133 -45 195 -285 2.92 5,737 Near eta=0 Weight: calculated as 25% silicon (balance is air)
Barrel EMCal 6.10.05 480 79.5 125.5 -45 195 -285 14.22 49,885 Sci Glass Weight: based on parametric estimate from CMS EMCal
EMCal Inner Surface 480 79 79.5 -45 195 -285 0.12 324 Aluminum Weight: calculated as 100% Aluminum
DIRC Support 455 65 79 -257 168 -287 2.60 1,019 Steel Offset: measured from point where DIRC bar connects to the readout
Volume: calculated as sum of sub-sections
Weight: estimated as 5% of total volume as steel (balance is air & detector)
Bar Support 425 65 77 -257 168 -257 2.28
Readout Support 30 65 105 -257 -257 -287 0.32 Readout support is triangular frame, therefore volume is halved.
Integrated DIRC/MPGD Detector 6.10.04 71.5 76.5 -257 168 -287 0.86 662 Fused silica bars Detector is totally enclosed by DIRC Support.
Weight: calculated as sum of sub-components
MPGD Tracker 340 74.5 76.5 -5 165 -175 0.32 65 muRWell (plane type) Weight: based on parametric estimate from SBS Gem
DIRC Bar Box 425 71.5 74.5 -257 168 -257 0.58 407 Weight: calculated as 30% quartz (balance is air & support system)
DIRC Readout 30 71.5 104.4 -257 -257 -287 0.27 191 Readout is triangular, therefore volume is halved.
Weight: Calculated as 30% silicon(balance is air & support system)
Barrel Time of Flight/Tracker 6.10.03 270 63 65 15 150 -120 0.22 43 AC/LGAD Weight: based on parametric estimate from SBS Gem
HD Time of Flight/Tracker 6.10.03 15 12 62 155.5 170.5 155.5 0.17 35 AC/LGAD Offset: measured from face nearest to interaction point
Weight: based on parametric estimate from SBS Gem
Silicon Tracker 6.10.03 228 3 45.9 0 126 -102 1.50 227 MAPS Weight: calculated as 3% aluminum and 3% silicon (balance is air)
Modular RICH 6.10.04 25 10 64 -135 -135 -160 0.31 58 Aerogel Offset: measured from face nearest to interaction point
Weight: based on parametric estimate from CLAS LTCC
LD Time of Flight/Tracker 6.10.03 10 12 64 -161 -161 -171 0.12 25 AC/LGAD Offset: measured from face nearest to interaction point
Weight: based on parametric estimate from SBS Gem
LD EMCal 6.10.05 60 9 63 -175 -175 -235 0.73 4,738 PbWO4 Offset: measured from face nearest to interaction point
Weight: estimated as 85% lead glass and 15% steel
Service Gap 10 -320 -320 -330 0.00 Offset: measured from location nearest to interaction point
LEPTON
DIRECTION
ENDCAP		 Backward Field Return 6.10.06 20.32 -330 -330 -350.32 5.18 40,649 Iron Offset: measured from face nearest to interaction point
Weight: calculated as 100% iron.
Return Cylinder 20.32 20 270 -330 -330 -350.32 4.63
Support Panel 7.62 454 664 -336.35 -336.35 -343.97 0.55 Height: specified in outer radius
Width: specified in inner radius