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  • Multichannel Data Acquisition System for GEM Detectors
    J. Fusion Energ. (IF 0.644) Pub Date : 2018-06-21
    Grzegorz Kasprowicz, Wojciech M. Zabołotny, Krzysztof Poźniak, Maryna Chernyshova, Tomasz Czarski, Michał Gąska, Piotr Kolasiński, Rafał Krawczyk, Paweł Linczuk, Andrzej Wojeński

    Abstract This paper presents the data acquisition system for GEM-detector (Sauli in Nucl Instrum Methods Phys Res Sect A Accel Spectrom Detect Assoc Equip 386(2–3): 531–534, 1997. https://doi.org/10.1016/S0168-9002(96)01172-2) based cameras and spectrometers (Chernyshova et al. in Fusion Eng Des, 2017. https://doi.org/10.1016/j.fusengdes.2017.03.107). The system is modular (Czarski et al. in Rev Sci

    更新日期:2020-03-24
  • Precise Derivation of the Intermediate Scale
    J. Fusion Energ. (IF 0.644) Pub Date : 2020-02-28
    Anton Schneider

    Abstract A classical problem of plasma physics is the treatment of the plasma-wall transition. This can be reached in the presheath with a presheath scale, in the sheath with a sheath scale and between presheath and sheath with an “intermediate scale”. Riemann (J Tech Phys 41:89–121, 2000) published a derivation of the intermediate scale. In our calculation we take the non-quasineutral values for the

    更新日期:2020-03-20
  • Nuclear Response Analysis of TFC for CFETR-I Using an Optimized GVR Approach
    J. Fusion Energ. (IF 0.644) Pub Date : 2020-02-25
    Jia Li, Huihua Yang, Jiaduo Chen, Huabin Zhang, Rui Li

    Abstract The nuclear analysis of the toroidal field coil (TFC) has been performed using China Fusion Engineering Test Reactor (CFETR)-I model of 33.75-degree torus sector with a pitched Neutral Beam Interface port. A novel optimized global variance reduction (GVR) approach has been applied to Monte Carlo N-Particle Transport Code (MCNP) simulation process to improve parallel computing efficiency. The

    更新日期:2020-03-20
  • Economic Performance of Fusion Power Plant on Deregulated Electricity Markets
    J. Fusion Energ. (IF 0.644) Pub Date : 2020-02-14
    Shutaro Takeda, Shigeki Sakurai, Satoshi Konishi

    Abstract Due to its complicated market mechanisms, conventional economic metrics such as Levelised Cost of Electricity may not be able to accurately represent the economic performance of nuclear fusion power plants on deregulated electricity markets. For this reason, this paper quantitatively analyzes the economic performance of steady-state fusion power plants on deregulated electricity markets for

    更新日期:2020-03-20
  • Theoretical Modeling of High-Resolution X-ray Spectra Emitted by Tungsten and Molybdenum Ions from Tokamak Plasmas
    J. Fusion Energ. (IF 0.644) Pub Date : 2020-01-30
    Ł. Syrocki, K. Słabkowska, E. Węder, M. Polasik, J. Rzadkiewicz

    Abstract In order to allow the advanced interpretation of the X-ray spectra registered by the high-resolution crystal KX1 spectrometer on the JET with an ITER-like wall, especially to determine how the relative emission contributions of tungsten and molybdenum ions change during a JET discharge, the X-ray spectra have been carefully modeled over a narrow wavelength range. The simulations have been

    更新日期:2020-03-20
  • Simulations of Fusion Power Measurements by Monitors of Neutron Flux in Evolving ITER Plasma
    J. Fusion Energ. (IF 0.644) Pub Date : 2020-01-28
    A. O. Kovalev, A. R. Polevoi, E. I. Polunovskiy, L. Bertalot, Yu. A. Kashchuk, D. V. Portnov, A. Loarte, M. Loughlin, S. D. Pinches

    Abstract We describe the synthetic diagnostics (SD) of the preliminary design of divertor neutron flux monitor (DNFM) dedicated for simulations of the neutron flux measurements in ITER. It is based on the technique developed for fast simulation of plasma evolution keeping the accuracy of comprehensive 3D Monte Carlo simulations. The developed technique is also applicable to simulations of diagnostics

    更新日期:2020-03-20
  • Economic Analysis of Carbon Removal Strategy by Fusion–Biomass Hybrid System in the Future Market Mechanism
    J. Fusion Energ. (IF 0.644) Pub Date : 2020-01-07
    Hoseok Nam, Keisuke Mukai, Juro Yagi, Satoshi Konishi

    Abstract Since the low-carbon technology fusion energy is scheduled to be commercialized beyond 2050, the late-mover needs to flexibly and strategically operate for sustainable cash flow responding to the future market mechanism. Carbon sequestration of the fusion–biomass hybrid system by using low-temperature heat is proposed under the two preconditions: the establishment of the deregulated electricity

    更新日期:2020-03-20
  • A High-Order Perturbation Method for an Investigation into Relativistic Stimulated Raman Back Scattering of a High Power Laser in Plasma
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-12-07
    P. Sharbati, B. Maraghechi, M. Olumi

    Abstract The relativistic stimulated Raman back scattering (SRBS) of a high power linearly polarized laser pulse in the plasma is investigated. The nonlinear coupled equations of Raman instabilities in the presence of combined effects of relativistic and ponderomotive nonlinearities are derived. Using high-order perturbation method in relativistic fluid-Maxwell model, a set of coupled non-linear equations

    更新日期:2020-03-20
  • Correction to: A New Vision for Fusion Energy Research: Fusion Rocket Engines for Planetary Defense
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-07-02
    G. A. Wurden, T. E. Weber, P. J. Turchi, P. B. Parks, T. E. Evans, S. A. Cohen, J. T. Cassibry, E. M. Campbell

    The sentence, “It was named C/2013 A1 (at 56 km/s, 0.7 km in diameter, weighing 3 × 108 metric Tons, it had 4 billion megatons of kinetic energy).” should read as.

    更新日期:2020-03-20
  • First Results and Plasma Current Start-Up in Taban Tokamak
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-10-17
    H. R. Mirzaei, R. Amrollahi

    Abstract Plasma current start-up and pre-ionization is an important motivation in Taban tokamak. The plasma current start-up has been successfully achieved using a central solenoid and a pre-ionization system and the experimental conditions have been optimized. Two distinct schemes were used to start-up the plasma current. Hot cathode emitter and electron cyclotron resonance (ECR) was used as the pre-ionization

    更新日期:2020-03-20
  • Estimation of the Current Sheath Dynamics and Magnetic Field for Theta Pinch by Snow Plow Model Simulation
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-06-15
    F. A. Ebrahim, W. H. Gaber, M. E. Abdel-kader

    Abstract The snowplow model and shock wave equation are used to simulate theta pinch plasma experiment. The model calculates the sheath velocity, radial position, plasma current, plasma temperature, and the induced magnetic field of the current sheath. The model uses two phases: the radial inward phase and the reflected shock phase. The governing equations are derived by using the current factor and

    更新日期:2020-03-20
  • On the Possibility of Initiating the Proton–Boron Nuclear Fusion Reaction in the Plasma-Focus Device
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-08-30
    M. Scholz, K. Król, A. Kulińska, L. Karpiński, A. Wójcik-Gargula, M. Fitta

    Abstract In this paper, the possibilities to perform aneutronic fusion in Plasma Focus (PF) devices have been presented. For this purpose, an idea of doping plasma by means of laser ablation of a solid boron target during discharge in PF-24 was presented. Some estimates have been made, based on the processes occurring during the discharge in the PF system with gas injection using a fast gas valve,

    更新日期:2020-03-20
  • Electromagnetic Viscous-Resistive-Drift-Wave Instability in Burning Plasma
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-05-11
    Umer Rehman

    Abstract Drift wave instabilities (DWI) might be take a part for anomalous transport in modern day tokamaks due to contributions of edge turbulence and zonal flows. Experimentally, it is found that micro-level turbulence (associated with two-fluid dynamics) braced with macro-level (associated with single-fluid dynamics) magnetohydrodynamics-type processes. In this paper, additional two-fluid effect

    更新日期:2020-03-20
  • Retrospective of the ARPA-E ALPHA Fusion Program
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-10-08
    C. L. Nehl, R. J. Umstattd, W. R. Regan, S. C. Hsu, P. B. McGrath

    Abstract This paper provides a retrospective of the Accelerating Low-cost Plasma Heating and Assembly (ALPHA) fusion program of the Advanced Research Projects Agency-Energy (ARPA-E) of the U.S. Department of Energy. ALPHA’s objective was to catalyze research and development efforts to enable substantially lower-cost pathways to economical fusion power. To do this in a targeted, focused program, ALPHA

    更新日期:2020-03-20
  • Cryogenics in Fusion: Industrial Approach of Cryogenics Applied to Fusion Plants
    J. Fusion Energ. (IF 0.644) Pub Date : 2018-10-13
    D. D’Andrea

    Abstract Cryogenics has a heavy impact on the overall cost of the experimental fusion plants, and the current approach to define cryogenics is not optimized in terms of energy efficiency. In order for future fusion reactors to produce energy for the grid, the energy consumption required by the cryoplant must be optimized to improve the final efficiency of the entire fusion power plant. We provide in

    更新日期:2020-03-20
  • Present Status of ITER Neutron Diagnostics Development
    J. Fusion Energ. (IF 0.644) Pub Date : 2019-07-11
    L. Bertalot, V. Krasilnikov, L. Core, A. Saxena, N. Yukhnov, R. Barnsley, M. Walsh

    Abstract Neutron diagnostic systems are needed to monitor some important ITER parameters, such as fusion power, power density or ion temperature. The aim of this paper is to describe various systems, such as neutron cameras, internal and external flux monitors, activation system and spectrometers. Also, the current status of in situ neutron calibration strategy is reported. ITER is currently under

    更新日期:2020-03-20
  • Bayesian Data Analysis for Gaussian Process Tomography
    J. Fusion Energ. (IF 0.644) Pub Date : 2018-11-20
    T. Wang, D. Mazon, J. Svensson, A. Liu, C. Zhou, L. Xu, L. Hu, Y. Duan, G. Verdoolaege

    Abstract Bayesian inference is used in many scientific areas as a conceptually well-founded data analysis framework. In this paper, we give a brief introduction to Bayesian probability theory and its application to the tomography problem in fusion research by means of a Gaussian process prior. This Gaussian process tomography (GPT) method is used for reconstruction of the local soft X-ray (SXR) emissivity

    更新日期:2020-03-20
  • Review of Neutron Diagnostics Based on Fission Reactions Induced by Fusion Neutrons
    J. Fusion Energ. (IF 0.644) Pub Date : 2018-08-14
    Urszula Woźnicka

    Abstract Neutrons are an exceptional diagnostic signature in magnetic fusion experiments with high temperature plasma. A part of neutron detection methods relies on detecting nuclear reactions products, initiated by neutrons. Among different possibilities, the neutron-induced fission reactions can be used. These methods use the specific properties of the radioactive decay phenomena induced by neutrons

    更新日期:2020-03-20
  • Advancements in Plasma Control Supervision
    J. Fusion Energ. (IF 0.644) Pub Date : 2018-09-11
    Kevin Meyer, Jayanethie Padayachee

    Abstract Early fusion projects were small enough with so few control variables that it was possible to define and execute experiments without sophisticated software tools. The session leaders/engineers-in-charge knew the key settings well enough that they could tell that the experiment was “safe”. If something went wrong, then they learned to check for it in the future. As projects grew in size and

    更新日期:2020-03-20
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