The IUCF High Intensity Polarized Ion Source (HIPIOS)(1) has been described in detail in reference [Der92], and has a design based on a source in operation at Triangle Universities Nuclear Laboratory described in reference [Cle95]. It uses a cold atomic beam technology with an electron cyclotron resonance (ECR) ionizer.
In the atomic beam system a hydrogen (or deuterium) gas is dissociated in
an rf discharge and formed into a slow beam of atoms as it moves
through a nozzle cooled to 
. This beam is polarized by electron
spin as it moves through a set of sextupole magnets. These magnets focus
the atoms with electron spins parallel to the local field and defocus
the atoms with anti-parallel spins. The electron polarization is then
transferred to the nucleus by initiating an rf transition which
interchanges populations of atomic hyperfine states. The neutral atomic
beam is then ionized by impact with fast electrons in magnetically confined
plasma heated by electron cyclotron resonance. The beam is extracted from
the ECR ionizer at 2 keV into an rf buncher which shapes the beam bunch and
accelerates it to 20 keV. The exit section of the source uses a
combination of a 
bend, a spherical electrostatic channel, and
two spin rotation solenoids to change the polarization of the beam
from longitudinal to normal before entering the beam transfer line. Just
prior to entering the beam line 1 (BL1) the beam is accelerated to 600
keV.