Two-dimensional quench simulation of composite CuNb/Nb3Sn conductors

✍ Scribed by Tomoyuki Murakami; Satoru Murase; Susumu Shimamoto; Satoshi Awaji; Kazuo Watanabe

• Book ID: 104112113
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 392 KB
• Volume: 40
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(00)00056-4

✦ Synopsis

In order to clarify eect of utilizing a Nb rich CuNb reinforment on superconducting stability, r±z two-dimensional time-dependent numerical simulations on composite CuNbaNb 3 Sn wires are conducted. The time variations of temperature and current density distributions, minimum quench energy (MQE), and normal zone propagation velocity (v p ) of a Cu±17vol%Nb/Nb 3 Sn wire, a Cu±63vol%Nb/Nb 3 Sn wire, and a conventional CuaNb 3 Sn wire are investigated. The increase of the volume fraction of an outermost Cu stabilizer provides high MQE but decreases the total current density. Although the v p is not signi®cantly in¯uenced by the Nb fraction, the Nb rich CuNb reinforcement sacri®ces the MQE for its high tensile strength. It is important for magnet design to control the volume fraction of the Cu stabilizer and Nb fraction in the CuNb reinforcement to balance the desired current density, tensile strength, and superconducting stability.