Disturbance energy of a forced flow cooled superconducting coil

The disturbance energy of a forced flow cooled superconducting coil (FCC) is discussed. The authors built a FCC and carried out stability and quench tests. The test coil had a 36-m-long cooling path with a 0.37-mm hydraulic diameter. It was cooled by supercritical helium at 4.1 K. The stability margin of the FCC was evaluated by using RF heating. In addition, the coil quench test was performed. The disturbance energy at quench is estimated by the stability margin characteristics. The disturbance energy obtained agrees well with that of a simple analytical model.<
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