在小孔近似下,考虑了导体壳上测量孔对等离子体柱平衡的影响。结果表明,其影响是相对地小的。讨论了影响最小的孔的分布方式,对孔和纵向切口所引起的影响作了简单比较. In the hole approximation, the influence of the measurement hole on the conductor shell on the plasma column balance is taken into account. The results show that its impact is relatively small. The distribution of the holes with the least influence is discussed, and the effects caused by the holes and the longitudinal cuts are briefly compared.