13th International Workshop on the Mechanisms of Vacuum Arcs (MeVArc 2026)

Session

Initiation

5 Oct 2026, 14:30

Conveners

Initiation

• Yinon Ashkenazy (The Hebrew University of Jerusalem (IL))
• Andreas Kyritsakis

Initiation

• Yinon Ashkenazy (The Hebrew University of Jerusalem (IL))
• Andreas Kyritsakis

9. Anode-Induced Effects in High-Gradient Vacuum Breakdown

Serhii Lebedynskyi (Institute of Applied Physics, National Academy of Sciences of Ukraine)

05/10/2026, 14:30

Experiments and Diagnostics

Oral

Modern research treats vacuum electrical breakdown not as an instantaneous cathode-centric event, but as a complex, multistage process involving intense electro-thermal interactions between both poles of the electrode system. While the initial triggering stages are traditionally attributed to field electron emission from cathode micro-protrusions, the anode actively modulates the pre-breakdown...

48. Memory Effect in Vacuum Microdischarges: A Comparison of Common and Noble Metal Electrodes

Dr Matej Klas (Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University)

05/10/2026, 15:00

Experiments and Diagnostics

Oral

Vacuum microdischarges driven by repetitive voltage pulses exhibit non-random variations in breakdown voltage, indicating the presence of a memory effect between successive pulses. In previous experiments with palladium electrodes, the breakdown voltage was found to increase progressively over a series of discharges before undergoing a sudden reset after reaching a critical value [1]. This...

44. Unveiling electric-field-driven deformation dynamics in metal nanostructures

Mr Jianyu Wang (Xi'an Jiaotong University)

05/10/2026, 16:00

1

Experiments and Diagnostics

Oral

Electric-field-induced effects severely impact the long-term stability and reliability of nanoelectronic devices with nanogaps, such as field emission nanodiodes, field-effect nanotransistors and ultrafast switches. However, the damage mechanisms behind nanostructured electrode under high electric fields remain unclear. In this talk,we will introduce our collabrative work on the deformation...

46. In Situ Observation of Field-Induced Surface Protrusion Formation in FCC Metals

Prof. Veronika Zadin (University of Tartu (EE))

05/10/2026, 16:30

Experiments and Diagnostics

Oral

High electric fields, in order of 100 MV/m and more, are common in particle accelerators, high electric field devices, electron sources, vacuum switches etc. These devices suffer from the presence of the vacuum breakdown. Vacuum breakdown is an electric discharge arc that forms spontaneously, is often hard to predict and is one of the limiting factors for such devices. One of the hypotheses...