A Super Ultra Cold Neutron source

Instrument layout

The coldneutron beam is represented by a green arrow labeled CN.

a:  the 100-L liquid helium bath
b: the needle valve
c: the 1-K pot
d: the 4He superleak
e: the 3He pumping column
f: the 3He impedance

g: the 3He/4He heat exchanger
h: the UCN box
i: the conversion volume at 0.6 K
j: the two beryllium windows
k: the UCN extraction system
l: the UCN valve
m: the superconducting magnet in a separate liquid helium bath: for SuperSUN phase II this replaces part of the phase I 4-K screen
n: the 4-K cryostat.