Quenches and resulting thermal and mechanical effects on epoxy impregnated Nb3Sn high field magnets.

Yamada, R.

Technical Information Center Oak Ridge Tennessee

关键词: Niobium base alloys;    Magnets;    Quenching;    Tin alloys;    Intermetallic compounds;   

RP-ID  :  DE2001783971

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Thermal and its resulting mechanical stress due to quenches inside the Epoxy impregnated Nb(sub 3)Sn high field magnets are studied with a combination of a quench simulation program, and ANSYS program. We use the geometry of the high field cosine theta type dipole magnets with one meter and 10 meter length. The turns, where quenches started, are excessively heated up, up to 100 K to 300 K, depending on the coil length and time delay. The non quenching turns and surrounding material are not heated substantially. This elevated temperature and its gradient cause the excessive local stress in the quenching conductors and their insulation material. The stress and strain in the conductor as well as in the insulation become excessive, and they are studied using the ANSYS stress analysis.