Z
X
Y
Frame 001 05 Feb 2004 As built out to gate valve 2
200 mm 58Ni 99% specular guide
200 mm DLC 50% diffuse “T”
65.5 mm DLC 99% specular guides
100% diffuseSS flange
SD2
Cu gap
Stopping UCN positions
X Y
Z
Frame 001 05 Feb 2004 As built out to gate valve 2
First bend90% specular DLC
Cu gaps
Stopping UCN positions
X Y
Z
Frame 001 05 Feb 2004 As built out to gate valve 2
Pump-out port and gate valve 190% specular DLC
Entrance to gate valve 2
Z
X
Y
Frame 001 05 Feb 2004 As built out to gate valve 2
PPM Magnetic field region Al window and fixture
6.4 mm Monitor hole 13.1+/-0.1x10-10 UCN/p
6.4 mm Monitor hole 22.0+/-0.3x10-11 UCN/p
65.5 mm Entrance to GV 24.87+/-0.04x10-9 UCN/p100% polarized
Stopping UCN positions
Where do the UCN go?(flapper obstruction not simulated)
Lost in the SD2 45.12%Lost in the vertical guides 42.32Lost in the SS flange 5.15Lost in the DLC guides before the Al window 2.71Lost in the Cu gaps 0.86Lost in the Al window 0.56Lost in the DLC guides after the Al window 0.07Leaks and numerical losses 0.04Still in the system* (at 240 s) 0.83Exited the monitoring holes 0.15Arrived at gate valve 2 2.19 100.0* System defined out to gate valve 2
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