AbstractFrictional heat is one of the causes of quench in a superconducting magnet. Therefore, sliding tests were carried out at 4 K in liquid helium for mainly SUS316L versus SUS316L combination in order to clarify the relationship between the frictional heat and temperature rise. Temperature rise was measured by two cryogenic thermocouples which were inserted into a SUS316L specimen at 0.4 and 1.4 mm just below the contact surface. The temperature rise increased with the frictional heat, but the relationship between them was not linear. To examine the behaviour of the thermal conduction of the frictional heat, a simulation analysis was carried out with the finite difference method. The heat was obtained to fit the measured temperature rise, and a comparison between the frictional heats obtained by the calculation and by the experiment was made.
超伝導マグネットにおけるクエンチの原因の一つとして摩擦熱が挙げられる。そこで、主にSUS316L同士の組合せについて、液体ヘリウム中4Kですべり試験を実施し、摩擦熱と温度上昇の関係を明らかにすることを試みた。温度上昇は、接触面直下0.4mmおよび1.4mmの位置に挿入した2本の極低温熱電対によって測定した。温度上昇は摩擦熱とともに増加したが、両者の関係は線形ではなかった。摩擦熱の熱伝導挙動を検討するため、有限差分法によるシミュレーション解析を実施した。実測の温度上昇に適合するように熱量を求め、実験から得られた摩擦熱と計算から得られた熱量の比較を行った。