Spin dependence in high pT2p^{2}_{T} elastic pp and np scattering

Using the polarized proton capability of the Argonne ZGS the authors recently made 90 degrees /sub cm/ measurements of elastic pp scattering from 6 to 11.75 GeV/c, determining the parallel and anti- parallel pure initial spin state cross sections and the associated spin-spin parameter A/sub nn/ with the spins normal to the scattering plane. They find that the parallel to anti-parallel cross section ratio rises dramatically from 1.2+or-.06 at p/sub t//sup 2/=3.3 (GeV /c)/sup 2/ to 3.2+or-.4 at 4.8 (GeV/c)/sup 2/, similar to the p/sub T //sup 2/ dependence previously observed at the fixed laboratory momentum of 11.75 GeV/c. They have also extended the measurements at 6 GeV/c and find that A/sub nn/ has a small but sharp rise at 90 degrees /sub cm/. In addition a month of 12 GeV/c polarized deuteron acceleration in the ZGS enabled them to measure two A/sub nn/ at two points at 6 GeV/c for np elastic scattering: A/sub nn/=-.17+or-.04 at p/sub T//sup 2/=.8, A/sub nn/=-.19+or-.05 at P/sub T//sup 2/=1.0. These values are opposite in sign from the pp results at the same momentum. (4 refs)

Study of a Depolarizing Resonance at the IUCF Cooler Ring

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Siberian Snake and Depolarizing Resonance Studies at the Cooler Ring

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

First Demonstration of a Higher Order Depolarizing Resonance

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Siberian Snake Overcomes "Overlapping" Depolarizing Resonances

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

RF Induced Depolarizing Resonanaces, Spin Flip, and Partial Siberian Snakes

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Accelerator Physics R and D. Final Technical Report for the Period December 15, 1993--December 14, 1997

During the 1990's, we focused our Accelerator Physics program on research and development of TeV polarized proton beams using Siberian snakes (a Siberian snake is a device which forces an accelerator ring's depolarizing fields to cancel themselves by rotating each proton's spin by 180{degree} on each turn around the ring): (1) Siberian snake experiments at the IUCF Cooler ring; (2) Design of polarized beam capability for the SSC; (3) Design of polarized beam capability for the Main Injector and Tevatron (funded by Fermilab); and (4) Design of polarized beam capability for HERA (funded by DESY). During FY 1994 to 1997, our Siberian snake experiments at IUCF continued to be unexpectedly successful. Their data have helped us to design polarized proton beam capability for Fermilab's Tevatron and Main Injector and now for DESY'S HERA

POLARIZED PROTONS AT THE AGS AND HIGH-P⊥2 SPIN EXPERIMENTS

Je discuterai les éléments importants qui ont permis d'obtenir des protons polarisés à l'AGS. Ceux-ci nous permettront d'obtenir de nouvelles informations sur le sujet passionnant des forces spin-spin à grand P⊥2 dans la diffusion élastique proton-proton.I will discuss the major items which were necessary to obtain polarized protons at the AGS. These will allow us to reach new information on the exciting subject of spin-spin forces in high- P⊥2 proton-proton elastic scattering

Experiments with polarized beams and targets

A lecture is given on possible experiments at the ZGS facility, and a discussion of the spin dependence of strong interactions. It is noted that the most interesting experiments will probably be studies of the differences between the various initial spin states in p + p scattering. (JFP