1. Interaction Region and DetectorIP
Ultra forward
hadron detection
dipole
Low-Q2
electron detection
Large aperture
electron quads
Small diameter
ion quads
Small angle
Central detector with endcaps
~50 mrad crossing
EM Calorimeter
Hadron Calorimeter
Muon Detector
Solenoid yoke + Hadronic Calorimeter
Solenoid yoke + Muon Detector
HTCC
RICH
Tracking
5 m solenoid

2. Interaction Region Physics Magnets
Electron quads
3.5 m from IP
0.3 m
3 cm bore
100 T/m
outer edge < 8.5 cm
(i.e. block up to 1.5 deg)
Dipole
5 m from IP m
2 Tm
1-5 deg
e- beam < 20 G
Dipole
18 m from IP
3.5 m
20 Tm
gap +/- 20 cm
Crossing angle
dipole
Large aperture
electron quads
Small diameter
ion quads
Ion quads
7, 9, 13 m from IP
1.2, 2.4, 1.2 m
14, 24, 34 cm bore
89, 51, 36 T/m
Outer edge < 20, 30, 50 cm
e- beam < 10 G
Solenoid
5 m long
2 – 4 T
Return Yoke can be here
(at +/- 5 meters)

3. Physics Magnet Specifications
crab crossing angle 50
mrad
max B field for SC magnet 6 T
Length
Peak field
peak field gradient
aperture (radius)
acceptance angle requirement
distance from IP
acceptance angle
e & p beamline separation
T/m cm
deg m mm
Detector solenoid 5
2 to 4
Detector dipole 1
250
Detector dipole 2
3.5 20 18
900
electron final focusing quad 1
0.3
109
1.5
175
electron final focusing quad 2 96 4
200
ion final focusing quad 1
1.2 89
6.74
>0.5 7
350
ion final focusing quad 2
2.4 51
11.76 9
450
ion final focusing quad 3
35.7
16.81 13
650

4. Estimate of the detector magnetic field (Bz)
QFF1
QFF2
QFFL
QFFP
~2 kG 4 3 2 1
Tesla
The detector magnetic field will have a significant impact on the beams. Some of the final focusing elements will have to work in this field.

5. Hall C Horizontal Bend(HB) SC Magnet Cutaway
(shown with HMS Q1)
Superferric “C” magnet
2.6 Tesla
21cmx25cm warm bore
0.75 M EFL
1.93 TM
19 % design margin
220 KJ stored Energy
SC is SSC outer cable
SHMS: reaches down to (central) angle of 5.5 deg at distance of ~1.5 meter
MEIC: @ distance of 5 meters reaches down to very small angles
would like to cover angle range between 1 and 5 degrees
or down to 8.5 cm and up to 42.5 cm

6. Separation of Electron and Ion Beams