Abstract
Materials for the F. R. P. cryostat should be selected out of various Fiber Reinforced Plastics. A F. R. P. cryostat for pulsed superconducting magnets has been made of F. R. P. by filament winding method. Its inner diameter is 200mm and the depth is 800mm. The evaporating rate of liquid helium was 0.42l/H initially and was 0.45l/H after one month.