Stability and Quench Behavior of $\hbox{YBa}_{2} \hbox{Cu}_{3}\hbox{O}_{7 - x}$ Coated Conductor at 4.2 K, Self-Field

Quench Detection and Protection for High-Temperature Superconductor Accelerator Magnets

“…The dependence of NZPV upon I/I c in this case is nearly linear, having NZPV ≈ 7.5 mm/s at 95% of the critical current. In [28], NZPV of the coated conductor was measured at 4.2 K in a self-field, yielding ≈ 4 mm/s at 56% of I c . At a lower temperature and high field conditions of 14 T relevant to high-field magnet applications, detailed measurements of NZPV were reported in [29], where I/I c = 1 NZPV was found to be in the range of 20-400 mm/s for the corresponding temperature range of 27-43 K. For the intermediate temperature of 40 K and more practical value of I/I c~0 .7, the measured NZPV was~20 mm/s.…”

Effects of high magnetic field on the quench behavior of Bi2Sr2CaCu2Oxcoils at 4.2 K

“…In-field quench measurements are performed using measurement protocols reported previously [11][12][13][14][15][16][17][18][19][20]. Here, the transport current is varied from 40% to 80% of I c (B).…”

“…Although the quench behavior of low temperature superconductor (LTS)-based magnets is well understood, HTS magnets show distinctly different behavior [11,12]. While the minimum quench energy (MQE) in HTS magnets is quite high, the normal zone propagation velocity (NZPV) is a few orders of magnitude lower than in LTS magnets [11][12][13][14][15][16][17][18][19][20][21][22][23]. Yet previous studies on HTS quench behavior have focused mostly on the behavior at self-field or relatively low magnetic fields [16,23].…”

Quench behavior of high-temperature superconductor (RE)Ba2Cu3O x CORC cable

“…Therefore, the quench becomes one of the largest challenges for HTS applications. The quench behavior of a single 2G HTS tape has been studied by both experiments and simulations [26][27][28][29][30]. However, the quench behavior of CORC cables is different from that of single HTS tapes.…”