1. JLab Spin Experiments Completed/on-going:
n (3He), both g1 and g2, 0.02 GeV2 < Q2 < 5 GeV2
p/d, g1, 0.02 GeV2 < Q2 < 5 GeV2
p/d, g2, Q2=1.3 GeV, 2 GeV2 < Q2 < 5 GeV2
Spin experiments to be done at 6 GeV:
g2p at low Q2 (not practical with 12 GeV)
g1d, constraint on DG
Semi-SANE, flavor decomposition
Transverse CLAS with HD

2. Neutron Spin Polarizabilities: “dLT Puzzle”
Significant disagreement between data and both ChPT calculations for dLTn
g0n dLTn
E94-010, PRL 93 (2004) Q2 Q2

3. Proton g2 at low Q2 Polarized Proton Target
g2 : central to knowledge of Nucleon Structure
but remains unmeasured at low Q2
Polarized Proton Target
Septa Magnets for low Q2
Critical input to Hydrogen Hyperfine Calculations
Violation of BC Sum Rule suggested at large Q2
State-of-Art PT calcs fail dramatically for LT n
LT Spin Polarizability
BC Sum Rule
K. Slifer Crimea07

4. Polarized Targets Polarized 3He: good shape Polarized NH3/ND3 targets
High polarization: 35% 65%
Highest pol. lumi: 1036
Polarized NH3/ND3 targets
Magnet, other hardware
Performance, FOM
Transverse polarization
Polarized HD