A. Zacharias

ORCID: 0009-0002-0041-4513
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About
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Research Areas
  • Vacuum and Plasma Arcs
  • Electrical Fault Detection and Protection
  • Magnetic confinement fusion research
  • Particle accelerators and beam dynamics
  • Advancements in Photolithography Techniques
  • Gyrotron and Vacuum Electronics Research
  • X-ray Spectroscopy and Fluorescence Analysis
  • Electrostatic Discharge in Electronics
  • Cosmology and Gravitation Theories
  • Injection Molding Process and Properties
  • Computational Physics and Python Applications
  • Diamond and Carbon-based Materials Research
  • Physics of Superconductivity and Magnetism
  • Thermal Analysis in Power Transmission
  • Advanced Mathematical Theories and Applications
  • Reliability and Maintenance Optimization
  • Electromagnetic Launch and Propulsion Technology
  • Safety Systems Engineering in Autonomy
  • Electrical Contact Performance and Analysis
  • Power System Reliability and Maintenance
  • Quantum and electron transport phenomena
  • Quantum, superfluid, helium dynamics
  • Metallurgical Processes and Thermodynamics
  • Advanced X-ray Imaging Techniques

Eaton (Germany)
2011-2023

Eaton (Taiwan)
2019

Gheorghe Asachi Technical University of Iași
1998

Polymer walls and inserts are an important design criterion in low-voltage switching devices. Besides their good insulation properties they used to influence the arc. An part of energy dissipated arc is absorbed by chamber. This leads degradation evaporation polymer subsequent impact on interaction with contribution explains enhancements existing simulation model for between composed polyamide PA 66. includes a plastic ablation, vapor transport as well its radiation. Calculations comparisons...

10.1109/holm.2011.6034770 article EN 2011-09-01

This paper describes a relatively high power density (10–15 kW/cm2) x-ray source for lithography applications. The utilizes stationary solid Pd target cooled by velocity water flow. has been operated several months in shop environment. No degradation performance observed.

10.1116/1.570360 article EN Journal of Vacuum Science and Technology 1979-11-01

Low-voltage circuit breakers have to be able detect and disconnect short currents autonomously. Especially for high-energy applications such as container ships the peak value of current has limited significantly in order not overload downstream parts electrical system. That is why contact system open rapidly well before maximum prospective been reached. Development design these devices faces challenge shorter development cycles, smaller volumes increasing technical requirements making it...

10.1109/holm.2004.1353091 article EN 2004-12-23

Simulation methods are routinely applied in the design and development process of power distribution devices. Arcing phenomena that occur during switching operations or fault events modeled to optimize device performance gain deeper insights into behavior testing cannot easily provide. In this contribution, some applications presented detail. The first example describes debris is generated inside a molded case circuit breaker (MCCB) short-circuit interruption. A model used analyze transport...

10.14311/ppt.2019.2.200 article EN Plasma Physics and Technology 2019-09-10

The spontaneous deflection of the beam in low voltage, typically noise, traveling-wave tubes has been studied and attributed to accumulation stray charges on glazed helix rods. A means measuring tendency show these charging effects will be described. method processing complete which prevents but does not seriously affect its cold loss or other microwave properties reviewed. Traveling-wave that have made with helices processed by this technique cannot deflections. Six accumulated 22,000 tube...

10.1109/t-ed.1965.15449 article EN IEEE Transactions on Electron Devices 1965-01-01

Electric arc discharges in low–voltage (LV) or medium–voltage (MV) power distribution devices can cause significant pressure rise. For example, a high amplitude peak damage the housing of LV circuit breaker initiating cracks during short interruption. In case larger deformations creation additional gaps, impact geometric changes on rise cannot be neglected. This paper describes new three–codes–coupling approach, wherein magneto–hydrodynamics (MHD) model consisting fluid– flow solver and an...

10.1109/jmmct.2023.3306154 article EN IEEE journal on multiscale and multiphysics computational techniques 2023-01-01

Identifying space with a superconducting cosmic dust, the structure of ‘world crystal’ is built. Particles moving on open geodesics are assimilated ‘electron gas’ in lattice, and those closed nodes same lattice. By considering that this kind may be achieved by pinning background gravitomagnetic field, properties such fields studied. From analysis computing energy we lead to Cantorian-fractal space–time, which allows one interpret gravitational interaction terms mechanism similar composite...

10.1071/p97023 article EN Australian Journal of Physics 1998-01-01

The spontaneous deflection of the beam in low voltage, typically noise, traveling wave tubes has been studied and attributed to accumulation stray charges on glazed helix rods. A means measuring tendency show these charging effects will be described. method processing complete which prevents but does not seriously affect its cold loss or other microwave properties reviewed. Traveling that have made with helices processed by this technique cannot deflections. Six accumulated 18,000 tube hours...

10.1109/iedm.1963.187353 article EN International Electron Devices Meeting 1963-01-01

At 4.2\ifmmode^\circ\else\textdegree\fi{}K and 5.514 Gc/sec persistent currents in lead, vanadium, niobium are free from fluctuations to less than 1.1\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}9}$, 4.3\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}9}$, 8.9\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}10}$ of full shot noise, respectively.

10.1103/physrev.135.a1 article EN Physical Review A 1964-07-06
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