摘要 : We present the results of our investigation of a series of internal holding magnets for longitudinal and transverse polarizations. These magnets will be placed inside a polarizing refrigerator designed for frozen spin targets. The... 展开 We present the results of our investigation of a series of internal holding magnets for longitudinal and transverse polarizations. These magnets will be placed inside a polarizing refrigerator designed for frozen spin targets. The studied magnets will provide the holding field in the range 0.3-0.5 T. The total thickness of the superconducting coils is of the order 0.5 mm. The frozen spin target is under construction for use in photo-nuclear experiments in concert with the JLAB Hall-B CLAS detector. 收起