distance along photon beam line (m)

1
Principal Elements in Hall D Photon Beam Line
Axis Definition
primary (active) collimator
beam position monitors
radiator crystal
secondary collimator
tagging spectrometer
LH2 target
photon beam pipe
Region II
Region III
Region I
0
10
20
60
50
40
30
80
70
90
100
-20
-10
distance along photon beam line (m)