Conveners
Modeling and simulations
- Matthew Hopkins
Modeling and simulations
- Matthew Hopkins
Modeling and simulations
- Sergio Calatroni (CERN)
Modeling and simulations
- Chris Moore
Modeling and simulations
- Veronika Zadin (University of Tartu (EE))
Modeling and simulations
- Andreas Kyritsakis (University of Tartu)
Modeling and simulations
- Shenli Jia
As part of the FCC feasibility studies, it is observed that vacuum breakdown rates in septa systems are significantly higher than expected. The electric fields there are much lower than in many high field applications, such as CLIC where 100 MV/m macroscopic fields are exploited. This is in stark contrast with previous observations but can be explained by the fact, that strong X-ray radiation...
High electric field systems, such as Compact Linear Collider accelerating structures, are susceptible to electric breakdowns or plasma arcs. Spontaneously forming surface protrusions or field-enhancing tips are currently assumed to be the main factor initiating the arc. While the evolution of the plasma arc is relatively well understood, the formation of the tips is still unclear. Several...
Increasing demands of energy, along with the yet increasing concern for the development of environmentally friendly technologies, call for exploring new ways of cost-efficient energy production. Hydrogen is one of the primary candidates for this purpose, due to its abundance and diverse ways of how it can be used. Moreover, hydrogen-based technologies are carbon-neutral, and hence their use...
Practical evidence suggests the important role of microparticles for the initiation of vacuum discharges. In the context of improving the performance of X-ray sources we simulated a stream of microparticles that intersect with an electron beam to convert electron energy in bremsstrahlung. Monte Carlo (MC) simulations of electron transport for single micrometer sized tungsten spheres in free...
Vacuum arcs, also known as breakdowns, are a major limiting factor in various high electric field vacuum applications. However, the physical mechanisms underlying the initiation of this phenomenon remain unclear. Recent experimental and numerical evidence indicates that local electromagnetic power might be the primary limiting factor in arc initiation, rather than the applied electric field...
Studying the breakdown process in small vacuum gap is very useful to understand the breakdown mechanism and improving
the performance of vacuum switches. In this paper, a two-dimensional vacuum breakdown model with two emission sources
was established based on particle-in-cell (PIC) method to simulate the formation process of cathode plasma during the small
gap vacuum breakdown. Firstly,...
Vacuum arc development has been previously studied by simulations focusing on different aspects of plasma initiation, surface modification, heating and emission. We describe the development of a model that concurrently couples particle-in-cell (PIC) plasma simulation and molecular dynamics (MD) to study how these phenomena are linked in vacuum arcing. Surface morphology changes influence...
In the framework of the project for the development of the Neutral Beam Injector foreseen for the ITER tokamak, and in support of operations of the Megavolt ITER Injector and Concept Advancement (MITICA), the High Voltage Padova Test Facility (HVPTF) is in operation in Padova, Italy. The experiments of HVPTF aim at studying and understanding the phenomenology of in-vacuum discharge events for...
Metal vapour vacuum arcs (VAs) are widely used in various fields of industry, such as circuit breakers, ion sources, electrical thrusters, and deposition systems. Although experiment is still the main research tool for VAs, numerical modeling has recently made rapid progress in their study. In recent years, our group has developed particle-in-cell (PIC) method [1-3] as well as fluid method...
