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	Blocks end at 132cm; last 10cm are readout	6.10.06	142	30	267	358	358	500	27.20	174,149	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
HADRON DIRECTION END CAP			6.10.05	38	30	190	328	328	366	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	320	328				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	150	320	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	-320	-150	17.97			Offset: measured from face nearest to interaction point
	Dual RICH		6.10.04	120	10		180	195	315	12.67	2,354	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	10	195	215	215	315	11.91			Offset: measured from face nearest to interaction point
		Aerogel Section		20	10	110	195	195	215	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	-252.5	192.5	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	-285	195	0.40	1,091	Aluminum	Weight: calculated as 100% Aluminum
	EMCal Electronics			480	125.5	133	-45	-285	195	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	-285	195	14.22	49,885	Sci Glass	Weight: based on parametric estimate from CMS EMCal
	EMCal Inner Surface			480	79	79.5	-45	-285	195	0.12	324	Aluminum	Weight: calculated as 100% Aluminum
	DIRC Support			455	65	79	-257	-287	168	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	-257	168	2.28
		Readout Support		30	65	105	-257	-287	-257	0.32			Readout support is triangular frame, therefore volume is halved.
	Integrated DIRC/MPGD Detector		6.10.04		71.5	76.5	-257	-287	168	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	-175	165	0.32	65	muRWell (plane type)	Weight: based on parametric estimate from SBS Gem
		DIRC Bar Box		425	71.5	74.5	-257	-257	168	0.58	407		Weight: calculated as 30% quartz (balance is air & support system)
		DIRC Readout		30	71.5	104.4	-257	-287	-257	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	-120	150	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	155.5	170.5	0.17	35	AC/LGAD	Offset: measured from face nearest to interaction point Weight: based on parametric estimate from SBS Gem
	Inner Tracker (Si, MPGD)		6.10.03	228	3	63	0	-102	126	2.84	429	MAPS	Weight: calculated as 3% aluminum and 3% silicon (balance is air)
	Modular RICH		6.10.04	25	10	64	-135	-160	-135	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	-171	-161	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	-235	-175	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	-330	-320	0.00			Offset: measured from location nearest to interaction point
LEPTON DIRECTION ENDCAP	Backward Field Return		6.10.06	20.32			-330	-350.32	-330	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	-350.32	-330	4.63
		Support Panel		7.62	454	664	-336.35	-343.97	-336.35	0.55			Height: specified in outer radius Width: specified in inner radius

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.
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
Fixed the labeling of the columns "Physical Start" and "Physical End"

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.