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. 2022 Oct 28;12:18176. doi: 10.1038/s41598-022-23145-5

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Photographs of the TSFF laboratory model: view from the side of the forming stage and commutation spark gap (a) and a profile with a close-up view of the commutation spark gap structure (b): 1—quick mounting system for fusible elements, 2—forming stage fusible elements, 3—insulating supports, 4—fuse compartment insulating partition, 5—CSG adjustable electrode, 6—bushing insulator and support for lower internal fitting of fusible elements, 7—external fuse cage with an integrated current measuring transducer for measuring fuse current components, 8—insulating tube of the fuse compartment, 9—external fuse fitting, 10—preparatory stage fusible elements, 11—lower internal fittings with hooks, 12—gas seal of the fuse compartment, 13—broadband pulse current measuring transducer. The approximate current flow path of the preparatory stage is marked with red arrows, while the blue arrows indicate the forming stage current flow path.