Design of a cold RF transition unit for the Michigan Polarized Jet
Abstract
In a storage ring, a polarized hydrogen gas target may be used as an internal polarized proton target for spin scattering experiments; if the beam is also polarized, it may also serve as a beam polarimeter and a target for spin-spin experiments. Recently, we produced a dense polarized hydrogen Jet with a thickness of about 7.9 10^11 atoms/cm^2 at Michigan.(Refer to talk by T. Kageya, this session.) The Jet's polarization of electrons is estimated at about 100%, and its polarization of protons at about 50%. To enhance the proton polarization, a cold RF transition unit will be installed to transfer the electron polarization into almost 100% proton polarization. The RF unit is being designed with emphasis on the following points: to decrease the heating due to the RF power, the RF unit's temperature distribution is being estimated by numerically solving a differential equation as a function of time; to increase the probability of spin-flipping a hydrogen atom, the distribution of the holding magnetic field in the RF region is being carefully designed. In addition to the main solenoidal coils, a set of correction coils would provide an optimum holding static magnetic field.
- Publication:
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APS April Meeting Abstracts
- Pub Date:
- April 2001
- Bibcode:
- 2001APS..APR.B9004Y