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	140	17.5	267	359.6	359.6	499.6	27.65	177,068	FeSc, WSc last segment	Tower size: 5cm x 5cm x 140cm including 10cm 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
HADRON DIRECTION END CAP	Electromagnetic Calorimeter		6.10.05	30	14.0	195	329.6	329.6	359.6	3.57	23,048	Pb/Sc	Tower size: 2.5 cm x 2.5 cm x 30 cm including readout 10cm Offset: measured from face nearest to interaction point Weight: estimated as 85% lead glass and 15% steel
	Service Gap			9			320	320	329				Offset: measured from location nearest to interaction point
CENTRAL DETECTOR	Dual RICH		6.10.04	120	15.0	185	180	195	315	11.43	2,123	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		100	15.0	185	215	215	315	10.68			Offset: measured from face nearest to interaction point
		Aerogel Section		20	15.0	110	195	195	215	0.75			Offset: measured from face nearest to interaction point
	HD Time of Flight/Tracker		6.10.03	15	8	67	180	180	195	0.21	42	AC/LGAD	Offset: measured from face nearest to interaction point Weight: based on parametric estimate from SBS Gem
	Barrel Hadron Calorimeter		6.10.06	639.2		268.2	0	-319.6	319.6	72.22	462,406	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	195.3	268.2	150	150	320	18.05			Offset: measured from face nearest to interaction point
		Central Section		300	183.3	268.2	0	-150	150	36.13			Offset: measured from center of detector
		LD Section		170	195.3	268.2	-150	-320	-150	18.05			Offset: measured from face nearest to interaction point
	Solenoid Magnet		6.10.07	384	142	177	-10	-202	182	13.47	45,956	Solenoid	Weight: based on parametric estimate from CLEO II
	Barrel EMCal*	EMCal Outer Support		492.2	132	141		-293.9	198.3	3.80	5,965	Steel	Weight: calculated as 20% of total volume as steel (balance is air)
		EMCal Outer Surface		492.2	130.5	131.5	-45	-293.9	198.3	0.41	1,098	Aluminum	Weight: calculated as 100% Aluminum
		EMCal Electronics		492.2	120.5	130.5	-45	-293.9	198.3	3.88	7,617	Near eta=0	Weight: calculated as 25% silicon (balance is air)
		Barrel EMcal	6.10.05	492.2	80.5	120.5	-45	-293.9	198.3	12.43	43,613	Sci Glass	Weight: based on parametric estimate from CMS EMCal
		EMCal Inner Surface		492.2	78.55	80.5	-45	-293.9	198.3	0.48	1,300	Aluminum	Weight: calculated as 100% Aluminum
	DIRC Support			458	65	79	-273	-273	185	1.33	523	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)
		Dirc Bar + MPGD Support		458	70	75	-273	-273	185	1.04
		Readout Support		30	70	105	-273	-273	-303	0.29			Readout support is triangular frame, therefore volume is halved.
	Integrated DIRC/MPGD Detector		6.10.04	488	71.5	76.5	-303	-303	185	0.86	661	Fused silica bars	Detector is totally enclosed by DIRC Support. This is the entire envelope of the detector + readout Weight: calculated as sum of sub-components
		MPGD Tracker		342	73	75	-197	-197	145	0.32	64	muRWell (plane type)	Weight: based on parametric estimate from SBS Gem
		DIRC Bar Box		458	70	73	-273	-273	185	0.62	430		Weight: calculated as 30% quartz (balance is air & support system)
		DIRC Readout		30	70	100	-273	-273	-303	0.24	168		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	66	0	-120	120	0.33	66	AC/LGAD	Weight: based on parametric estimate from SBS Gem Length in z needs to be determined
	Inner Tracker (Si, MPGD)	Alternative based on pfRICH see line 43	6.10.03	310	3.62	60	0	-130	180	3.49	528	MAPS	Weight: calculated as 3% aluminum and 3% silicon (balance is air)
	Modular RICH	Alternative Technology pfRICH, see line 38	6.10.04	42.7	8.0	63	-130	-130	-172.7	0.52	97	Aerogel	Offset: measured from face nearest to interaction point Weight: based on parametric estimate from CLAS LTCC
	LD Time of Flight/Tracker REMOVED		6.10.03	10	-7.3	64	-161	-161	-171	0.13	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	9.0	63	-174	-174	-234	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 HCal	HCal	6.10.06	45	12.4	275	-329.6	-329.6	-374.6			Iron/SC	Offset: measured from face nearest to interaction point Weight: calculated as 100% iron.
LEPTON DIRECTION ENDCAP	Backward HCal	Flux Return		20.32	12.9	271.3	-375	-375	-395.32			Iron	Offset: measured from face nearest to interaction point Weight: calculated as 100% iron.




CENTRAL DETECTOR ALTERNATIVES	Proximity Focusing RICH	Alternative Technology to mRICH, see line 28	6.10.04	54.1	8.0	63	-118.6	-118.6	-172.7	0.66	0	Aerogel + Gas	Offset: measured from face nearest to interaction point Weight: based on parametric estimate from CLAS LTCC
	Barrel EMCal Alternative	Imaging Part	6.10.05	434.5	78.3	92.25	-257	-257	177.5	3.26		Pb+Sc+Si
		Sampling Part		434.5	93.3	117	-257	-257	177.5	6.82		PB+Sc
		LD Readout Electronics		15	78.3	117	-272	-257	-272	0.36
		HD Readout Electronics		15	78.3	117	177.5	177.5	192.5	0.36
	Inner Tracker (Si, MPGD)	Alternative based on pfRICH	6.10.03	298.6	3.6	60	0	-118.6	180	3.36	19	MAPS	This envelope includes the Si disks in the lepton and hadron direction as wel las the barrel tracker. Weight: calculated as 3% aluminum and 3% silicon (balance is air)

Comments, References and Contact Information

The information provided on this page is generated directly from the originating spreadsheet. The data in this section should provide insights into the design choices that have been made over time, along with references to documentation regarding the changes. To request clarification or changes to this information (or to information in the geometry matrix), please reach out to the individuals listed in the Contacts section.

Comments

Author
Date
Comment
Tanja Horn

April 12, 2022

Consolidation of ECCE DB with Athena format
Tanja Horn

April 13, 2022

Initial Detector-1 DB posted
Tanja Horn

May 19, 2022

Fixed inconsistencies in DIRC frame, hpDIRC and MPGD:
Iterated hpDIRC position as balance between phi-coverage and frame engineering strength need;
added 2-cm space for MPGD tracker (muRWell or MM) on top of DIRC bar boxes --> now 5cm slot for both together;
added slots for service needs in frame
Tanja Horn

June 24, 2022

Development of EIC Geometry Management System complete
Tanja Horn

July 01, 2022

First release of the geometry and master parameter table
Tanja Horn

August 22, 2022

At the request of the GD/I WG added explicitly space for an inner MPGD barrel tracker. Additional detail:
In the ECCE geometry table, the two barrel muRWell trackers (R=33, 51 cm) are lumped with the silicon tracker as 'Inner Tracker' extending from R=3-51 cm, plus a detector-free space from R=51-60 cm (low mass BdL region for enhancing low momentum tracking)
In the 24-June-2022 EPIC geometry table [https://eic.jlab.org/Geometry/Detector/Detector-20220624102507.html], silicon tracker extends from R=3-45.9cm. Nonetheless, there is a detector-free space from R=45.9-63 cm
The current simulation campaign setup include one muRWell layer at R=51 cm too. And I agree it is prudent to leave the space to allow inner MPGD barrel tracker, if the tracking study find them needed.
Tanja Horn

September 05, 2022

At request of the EIC Project Leads updated the dimensions in the Hadron Endcap. Additional detail:
dRICH: Length changed to 120cm; gas length changed to 100cm starting at z=215cm; aerogel length remains at 20cm starting now at 195cm
EMCAL: length remains at 38cm; start remains at z=328cm
HCAL: changed length to 142cm (including readout); front face starts at z=358cm
Total length of the Hadron endcap so that ends at z=500cm
Tanja Horn

September 05, 2022

Fixed the labeling of the columns "Physical Start" and "Physical End"
Tanja Horn

September 29, 2022

At request of the EIC Project Leads: overall update on detector envelopes consistent with the mechanical CAD model was implemented. Additional detail:
Hadron endcap HCAL: position adjusted
Hadron endcap EMCal: position adjusted, inner radius adjusted, and fixed a typo in the length
Barrel HCAL: length and outer radius adjusted
Barrel EMCal: positions adjusted
Solenoid: added offset from center 10 cm to allow for barrel EMCal (independent of technology) support structure and servides; adjusted positions
Electron Endcap mRICH: adjusted length, outer radius (including 2 cm of support structure), and positions
Electron Endcap TOF: REMOVED
Electron Endcap EMCal: position adjusted for hermeticity with barrel EMCal, inner radius adjusted
Electron Endcap HCAL: Added a line for the HCAL and its properties
Alternative technologies: Added lines for pfRICH, imaging barrel EMCal, and tracking based on pfRICH option

References

Title
Date
Description
Detector Menagerie

A complete collection of Sketchup models that can be used to construct detector systems from parts. Each of the sub-components is independently configurable.
A collection of CAD/Step files that provided by other sources or are being developed in coordination with the Menagerie models to test strength and deflection

Contacts

Name
E-Mail
Details
Tanja Horn

hornt@cua.edu

Primary contact for information that is stored in the Detector Geometry Matrix.
Walt Akers

akers@jlab.org

Technical contact for online data, features and accessibility.