Dynamic Deuteron Polarization Measurements Performed in a New Type of Horizontal Dilution Cryostat

摘要

We have reached 31% deuteron polarization in D- ammonia (ND sub 3 ) and 27% in D- butanol (C sub 4 D sub 10 O). The dynamic polarization experiments were performed at a magnetic field of 2.5 T in a new type of horizontal dilution cryostat. This dilution cryostat, built for target asymmetry measurements with a photon beam, was developed with special regard to fast cool-down and easy loading of the target material. The cooling power is 5 mW at 0.2 K, 20 mW at 0.3 K and 34 mW at 0.4 K. Starting from room temperature the lowest temperature of 165 mK is reached in about 2 h including the loading of the target material. (ERA citation 08:034304)