The heat-isolating metal film was cut in strips to avoid vortex excitedby the primary field of TEM, and thus the influence of Dewar on measurements waseliminated.

• 采用具有迭层、独立单元的杜瓦绝热技术,避免绝热层金属薄膜在瞬变电磁一次场激发下产生涡流,消除杜瓦对测量的影响。