Frozen-Spin Polarized HD Target for Spin Asymmetry Experiments

Pion photo-production experiments have been performed with a longitudinally polarized HD target and circularly as well as linearly polarized photon beams at the Laser-Electron-Gamma-Source (LEGS) facility at BNL. A Hydrogen-Deuteron target, polarized and aged for 86 days at 15 Tesla in a dilution refrigerator which reached a base temperature of 8 mK, reached a frozen-spin state with polarizations of 15.1 ± 0.7 % and 59.9 ± 1.5 % for deuterons (D) and protons (H), respectively. The target was transfered to an In-beam Cryostat which held the it at 0.9 Tesla and a temperature of 250 mK. Relaxation times in IBC for D and H have been measured to be about 5 months for both. Preliminary double-polarization data are presented.