The ATLAS superconducting magnet system comprising Barrel (BT) and End-Cap Toroids (ECT) and also Central Solenoid (CS) will store more than 1.5 GJ of magnetic energy. The magnet system will have many superconducting busbars, a few meters long each, running from the current leads to Central Solenoid and Toroids as well as between the coils of each Toroid. Quench development in the busbars, i.e., the normal zone propagation process along the busbar superconductors, is slow and exhibits very low voltages. Therefore, its timely and appropriate detection represents a real challenge. The temperature evolution in the busbars under quench is of primary importance. Conservative calculations of the temperature were performed for all the magnets. Also, a simple and effective method to detect a normal zone in a busbar is presented. A thin superconducting wire, which normal resistance can be easily detected, is placed in a good thermal contact to busbar. Thus, the wire can operate as a straightforward and low-noise quench-detector.
|Number of pages||4|
|Journal||IEEE transactions on applied superconductivity|
|Publication status||Published - 2000|
|Event||16th International Conference on Magnet Technology, MT-16 1999 - Ponte Vedra Beach, United States|
Duration: 29 Sep 1999 → 1 Oct 1999
Conference number: 16