Results of measurements of helical current perturbations associated with the disruptive instability are given for q(a) ∼ 3. An m = 1, n = 1 mode develops between disruptions; fast growing m = 2, n = 1 and m = 6, n = 2 (or m = 3, n = 1) modes, with growth times of ∼ 10 μs, accompany the disruptions.
q(a) ∼ 3におけるディスラプティブ不安定性に伴うヘリカル電流摂動の測定結果を示す。m = 1, n = 1モードはディスラプション間に発達し、成長時間が∼ 10 μsの急速に成長するm = 2, n = 1およびm = 6, n = 2（またはm = 3, n = 1）モードがディスラプションに伴って現れる。