T. Rinckel

Siberian snake experiments at the IUCF Cooler Ring

Recent polarized proton beam experiments in the IUCF Cooler Ring found an evidence for a second-order snake depolarizing resonance, when the vertical betatron tune was inadvertently set near a quarter-integer. We have also studied the possibility of spin-flipping the beam polarization in the presence of a full Siberian snake using an RF solenoid. By varying the rf solenoids ramp time and frequency range, we reached a spin-flip efficiency of about 97%.

Spin correlation coefficients in p⃗p⃗→pnπ+ from 325 to 400 MeV

The spin correlation coefficient combinations S≡Axx+Ayy, D≡Axx−Ayy and the analyzing powers Ay(θ) were measured for pp→pnπ+ at beam energies of 325, 350, 375 and 400 MeV. A polarized internal atomic hydrogen target and a stored, polarized proton beam were used. These polarization observables are sensitive to contributions of higher partial waves. A comparison with recent theoretical calculations is provided.

Nuclear polarization of H2 molecules formed from polarized atoms

A planned experiment to measure the nuclear polarization of H2 molecules formed by recombination of polarized H atoms is described. Polarization will be measured with a longitudinally polarized 200 MeV proton beam and a longitudinally polarized storage cell gas target at the IUCF cooler ring.

Measurement of spin correlation coefficients inp→p→→dπ+

The spin correlation coefficent combinations

Measurement of spin correlation coefficients in p(vector sign)p(vector sign){yields}d{pi}{sup +}

{A}_{\mathrm{xx}}{+A}_{\mathrm{yy}}

Angular distribution of the longitudinalp→p→spin correlation parameterAzzat 197.4 MeV

and

Polarized internal gas target for hydrogen and deuterium at the IUCF cooler ring

{A}_{\mathrm{xx}}\ensuremath{-}{A}_{\mathrm{yy}},

Measurement of Coulomb-Nuclear Interference in the pp Analyzing Power Ay at the IUCF Cooler Ring

the spin correlation coefficients

Complete angular distribution measurements of pp spin correlation parameters A{sub xx}, A{sub yy}, and A{sub xz} and analyzing power A{sub y} at 197.4 MeV

{A}_{\mathrm{xz}}

Measurement of Quasielastic [sup 3]He([ital [rvec p]],[ital pN]) Scattering from Polarized [sup 3]He and the Three-Body Ground State Spin Structure

and