Each Target can handle rastered beam up to 120 microAmps, Beam heating up to 700 Watts. Each of the three targets can be remotely moved in and out of beam. Based on the principle of spin exchange between optically pumped Rb vapor and 3 He gas. Design similar to SLAC E142 target. He target provides a target close to a polarized neutron target since the spin of the two protons in 3 He are almost all paired in opposite directions.
Some Drawings are available now.
Hydrogen in water provides a precision calibration.