Principle of Operation:  The heated ampoule introduces potassium into the spincell, which is optically pumped with circular polarized light.  Hydrogen molecules are broken up in the dissociator and enter the spincell as atomic hydrogen. 
 
 

Components:  a) hydrogen bottle,  b) mass flow control,   c) RF dissociator,  d) potassium ampoule,  e) spincell,  f) torlon oven,  g) target cell,  h) blank gasket aperatures,  i) gate valve,  j) shutter,  k) permanent sextupole magnet,  l) chopper,  m) quadrupole mass analyzer,  n) non-evaporable getter pump,  o) 1000 l/s turbo pump,  p) 300 l/s ion pumps,  q) 0.1T holding field coils,  r) 20W argon ion laser,  s) 3W Ti:Saphire laser,  t) wavemeter,  u) beam expander,  v) 1/4 waveplate,  w) polarization preserving mirrors,  x) power meter.
 
 

These are preliminary polarization measurements.  The pink curve shows the mass 1 signal detected by the QMA after filtering out the spin -1/2 state with the sextupole magnet.  There is a peak and a valey, corresponding to positive and negative hydrogen nuclear polarization.  The blue curve shows absorption of the laser at the positive and negative helicity resonances of potassium.  There should be only one peak in each graph, corresponding to the helicity of the laser.  However, the polarization preserving mirrors had a manufacture defect, leaving the beam with only 88% polarization.  Thus, the measured polarization was only between 20-25%.  We expect improved performance once these mirrors are replaced.