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  1. No Access

    Chapter and Conference Paper

    Leveraging HPC Profiling and Tracing Tools to Understand the Performance of Particle-in-Cell Monte Carlo Simulations

    Large-scale plasma simulations are critical for designing and develo** next-generation fusion energy devices and modeling industrial plasmas. BIT1 is a massively parallel Particle-in-Cell code designed for s...

    Jeremy J. Williams, David Tskhakaya… in Euro-Par 2023: Parallel Processing Worksho… (2024)

  2. No Access

    Chapter and Conference Paper

    Optimizing BIT1, a Particle-in-Cell Monte Carlo Code, with OpenMP/OpenACC and GPU Acceleration

    On the path toward develo** the first fusion energy devices, plasma simulations have become indispensable tools for supporting the design and development of fusion machines. Among these critical simulation t...

    Jeremy J. Williams, Felix Liu, David Tskhakaya… in Computational Science – ICCS 2024 (2024)

  3. Article

    Open Access

    Plasma potential probes for hot plasmas

    Plasma probes are well established diagnostic tools. They are not complicated, relatively easy to construct and to handle. The easiest and fastest accessible parameter is their floating potential. However, th...

    Codrina Ionita, Bernd Sebastian Schneider, Stefan Costea… in The European Physical Journal D (2019)

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  4. No Access

    Article

    Density of States in Tritiated Amorphous Silicon Measured Using CPM

    The constant photocurrent method has been used to obtain the density of occupied electronic states of tritiated amorphous silicon thin films. The analyses showed a peak of defects located 1.24 eV below the con...

    Simone Pisana, Stefan Costea, Tome Kosteski… in MRS Online Proceedings Library (2005)

  5. No Access

    Article

    Modeling of Beta Conductivity in Tritiated Amorphous Silicon

    The change with time in the electrical conductivity of a hydrogenated-tritiated amorphous silicon film (a-Si:H:T) has been studied. The conductivity decreased with time after deposition. A model is developed t...

    Stefan Costea, Franco Gaspari, Tome Kosteski… in MRS Online Proceedings Library (2000)

  6. No Access

    Article

    Recombination in Tritiated Amorphous Silicon

    Tritiated amorphous silicon was used for the intrinsic layer of a p-i-n hydrogenated amorphous silicon diode. Current versus voltage measurements were carried out on the diode over time under dark and illumina...

    Tome Kosteski, Franco Gaspari, David Hum, Stefan Costea… in MRS Online Proceedings Library (2000)