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Vacuum Pressure

10{^-6} Torr

Maximum Radiation Dose

1X10{¹⁴} 2 GeV electrons (~3X10{¹³} 1MeV NEQ)

Maximum Magnetic Field

0.55 Tesla

Target

0.125% X{₀} Tungsten (approx. 4 microns thickness)

# tracking planes

5

two modules per plane, one above and one below the dead zone

Sensors per module

2, in small angle stereo configuration

Stereo angles L1; L2; L3; L4; L5 (mrad)

(0/100); (0,100); (0,50); (0,50); (0,50)

stereo sensors dip away from dead zone on electron side. Stereo sensors rotated about centers.

Nominal dead zone between non-bend sensors w.r.t. photon line

+/- 15 mrad

z-positions from target (mm)

100, 200, 300, 500, 700

x-positions w.r.t. photon line

0 in all layers

y-positions w.r.t. photon line