Interaction Region and Detector
Small angle
hadron detection
Central detector with endcaps
Low-Q2
electron detection
Ultra forward
hadron detection
ion quads
dipole
Large aperture
electron quads
dipole
IP
dipole
Small diameter
electron quads
~50 mrad crossing
Solenoid yoke + Muon Detector
EM Calorimeter
Hadron Calorimeter
Muon Detector
Tracking
RICH
RICH
HTCC
EM Calorimeter
Solenoid yoke + Hadronic Calorimeter
5 m solenoid
Page 1
Interaction Region Physics Magnets
Electron quads
• 3.5 m from IP Crossing angle
• 0.3 m
• 3 cm bore
• 100 T/m
• outer edge < 8.5 cm
Dipole
• 5 m from IP
• 0.8-1.0 m
• 2 Tm
• 1-5 deg
• B @ e- beam < 20 G
Dipole
• 18 m from IP
• 3.5 m
• 20 Tm
• gap +/- 20 cm
(i.e. block up to 1.5 deg)
ion quads
dipole
Large aperture
electron quads
dipole
dipole
Small diameter
electron quads
Solenoid
• 5 m long
•2–4T
• Return Yoke can be here
(at +/- 5 meters)
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
• B @ e- beam < 10 G
Page 2
Physics Magnet Specifications
crab crossing angle
max B field for SC magnet
50
6
mrad
T
acceptance
e&p
Peak peak field aperture
angle
distance acceptance beamline
Length field gradient (radius) requirement from IP
angle
separation
T
T/m
cm
deg
m
deg
mm
Detector solenoid
5
2 to 4
500 - 300
Detector dipole 1
0.8-1.0 2.5-2.0
5
250
Detector dipole 2
3.5
6
20
18
900
electron final focusing quad 1 0.3
109
1.5
3.5
175
electron final focusing quad 2 0.3
96
1.5
4
200
ion final focusing quad 1
1.2
89
6.74
>0.5
7
0.55180573
350
ion final focusing quad 2
2.4
51
11.76
>0.5
9
0.74896507
450
ion final focusing quad 3
1.2
35.7
16.81
>0.5
13
0.74073469
650
Page 3
Estimate of the detector magnetic field (Bz)
4
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.
3
Tesla
2
1
QFFP
QFFL
QFFP
QFF2 QFF1
QFF1 QFF2
QFFL
~2 kG
Page 4
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
Page 5
Separation of Electron and Ion Beams