“Pump up your luminosity:” High pressure 3 He target with an ex situ SEOP polarizer. Bill Hersman 1,2 ,Iulian C. Ruset 2,1 , Jan Distelbrink 2 , and David Watt 2. 1 University of New Hampshire 2 Xemed LLC. Disclosure: The author/speaker has a financial interest in Xemed LLC. 1.
Bill Hersman1,2,Iulian C. Ruset2,1, Jan Distelbrink2, and David Watt2
1University of New Hampshire
Disclosure: The author/speaker has a financial interest in Xemed LLC
Linkage between pumping cell and target cell limits performance
An optimized high luminosity target will have losses dominated by beam depolarization, where beam-related polarization losses are balanced by very high production rates of polarized 3He
Recirculating at 1.0 scfm
1 cm x 40 cm titanium target cell
Requires two ports, entrance and exit
 E. Babcock et al. Phys Rev Lett, 91:123003 (2003).
 E. Babcock et al. Phys Rev Lett, 96:083003 (2006).
Cross sections of the polarizer.
What we hope to achieve
Where we are
Broad spectrum laser with 1.4kW power.
Cartridge with cell and oven, to be loaded in pressure vessel.
Prototype polarizer in operating state.
near top window
Loading distiller with K and Rb
K:Rb puddle in cell bottom (after removal from polarizer)
Monolithic blown laser window
with lensing correctable externally
Output of one laser bar,
corrected and uncorrected
1400 W narrowed (square)
2200 W narrowed (round)
Funding: DOE grant DE-FG02-08ER86369
NIBIB grant EB007439