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10th International Workshop on the Mechanisms of Vacuum Arcs (Hybrid MeVArc 2022)

18–22 Sept 2022
Chania, Crete
Europe/Athens timezone

MeVArc 2022 contact

Session

Applications

22 Sept 2022, 14:30
Chania, Crete

Chania, Crete

Orthodox Academy of Crete, Platanias 73006, Greece

Conveners

Applications

  • Jan Borburgh (CERN)

Presentation materials

There are no materials yet.

  1. 24. Fundamental Study on Conditioning of a Vacuum Gap with Low Breakdown Energy
    Mr Dingjiangang Ding (Xi'an Jiaotong University)
    22/09/2022, 14:30
    Applications
    Oral

    Conditioning experiment of a commercial vacuum interrupter was carried out with a gap distance of 1~3 mm. Energy of the vacuum arc following a breakdown has been controlled to be as low as several hundred mJ with a 100 kΩ current-limiting resistor. Breakdown voltage and field emission current was measured during the conditioning process. The Murphy-Good plot was employed to further study...

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  2. 26. The role of alumina coating porosity on the electrical insulation in a weakly ionized plasma atmosphere
    Luigi Cordaro
    22/09/2022, 15:00
    Applications
    Oral

    The design of the RFX-mod2 experimental fusion device requires a copper shell close to the plasma to aid in stability and magnetic confinement of the plasma [1,2]. This conductive structure, only 3mm thick, placed around the plasma, must have electrical discontinuities in both the poloidal and toroidal directions, so as to allow the penetration of electromagnetic fields into the plasma region....

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  3. 29. High Gradient CrYogenic Brightness-Optimized Radiofrequency Gun (CYBORG) Test Bed
    Gerard Lawler
    22/09/2022, 15:30
    Applications
    Oral

    Producing higher brightness beams at the cathode is one of the main focuses for future electron beam applications. For photocathodes operating close to their emission threshold, the cathode lattice temperature begins to dominate the minimum achievable intrinsic emittance. At UCLA, we are designing a radiofrequency (RF) test bed for measuring the temperature dependence of the mean transverse...

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  4. 11. Open Issues in a Self Consistent RF Vacuum Arc Model
    Jim Norem
    22/09/2022, 16:00
    Applications
    Oral

    We find that a general vacuum arc model seems to require four stages: a trigger, ionization, plasma evolution, and surface damage. Within this framework, a large number of mechanisms operate, involving field emission, surface failure, ionization, plasma interactions with the surface and surface interactions with plasma. Field emission is complicated by the duty cycle, space charge, nearby...

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  5. 34. Coherent Arc behavior in the VAR process
    Abdellah Kharicha (CD Lab for mettalurgical applications of MHD)
    Simulations
    Oral

    Vacuum Arc Remelting (VAR) is typically the final melting process in the production of a wide range of metallic alloys. The process consists in applying during days a DC current of up to 40 000 A over large electrodes(~1m diameter). A strong DC arc takes place under vacuum between an electrode and a water-cooled copper crucible. For low applied current, high-speed video observation showed that...

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  6. 20. Control of erosion and ignition of pulsed vacuum arcs
    Michael Keidar
    Applications
    Oral

    We will present recent results related to control of vacuum arc ignition and erosion in pulsed vacu-um arc devices. As a particular example, we will consider vacuum arc microthruster devices. To this end, we will discuss breakdown process in the case of a micro-vacuum arc thruster. In these devices ignition analysis includes effects of insulator material, cathode material deposition and...

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