Publisher: Cambridge University Press   (Total: 386 journals)

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Showing 201 - 386 of 386 Journals sorted alphabetically
J. of Child Language     Hybrid Journal   (Followers: 30, SJR: 1.035, CiteScore: 2)
J. of Chinese History / 中國歷史學刊     Hybrid Journal  
J. of Classics Teaching     Open Access  
J. of Clinical and Translational Science     Open Access  
J. of Dairy Research     Full-text available via subscription   (Followers: 8, SJR: 0.573, CiteScore: 1)
J. of Demographic Economics     Hybrid Journal   (Followers: 3, SJR: 1.227, CiteScore: 1)
J. of Developmental Origins of Health and Disease     Hybrid Journal   (Followers: 2, SJR: 0.843, CiteScore: 2)
J. of Diagnostic Radiography and Imaging     Hybrid Journal   (Followers: 4)
J. of East Asian Studies     Full-text available via subscription   (Followers: 16, SJR: 0.59, CiteScore: 1)
J. of Ecclesiastical History     Hybrid Journal   (Followers: 19, SJR: 0.138, CiteScore: 0)
J. of Economic History     Full-text available via subscription   (Followers: 46, SJR: 1.82, CiteScore: 2)
J. of Experimental Political Science     Full-text available via subscription   (Followers: 6, SJR: 2.526, CiteScore: 2)
J. of Financial and Quantitative Analysis     Full-text available via subscription   (Followers: 49, SJR: 3.636, CiteScore: 2)
J. of Fluid Mechanics     Hybrid Journal   (Followers: 190, SJR: 1.591, CiteScore: 3)
J. of French Language Studies     Hybrid Journal   (Followers: 5, SJR: 0.163, CiteScore: 0)
J. of Functional Programming     Hybrid Journal   (Followers: 1, SJR: 0.458, CiteScore: 1)
J. of Germanic Linguistics     Full-text available via subscription   (Followers: 8, SJR: 0.157, CiteScore: 0)
J. of Global History     Full-text available via subscription   (Followers: 29, SJR: 0.34, CiteScore: 1)
J. of Hellenic Studies     Full-text available via subscription   (Followers: 19, SJR: 0.146, CiteScore: 0)
J. of Helminthology     Hybrid Journal   (Followers: 2, SJR: 0.553, CiteScore: 1)
J. of Hospitality and Tourism Management     Full-text available via subscription   (Followers: 14, SJR: 0.949, CiteScore: 2)
J. of Institutional Economics     Hybrid Journal   (Followers: 15, SJR: 0.978, CiteScore: 2)
J. of K-Theory     Full-text available via subscription  
J. of Laryngology & Otology     Hybrid Journal   (Followers: 21, SJR: 0.495, CiteScore: 1)
J. of Latin American Studies     Hybrid Journal   (Followers: 33, SJR: 0.34, CiteScore: 1)
J. of Law and Religion     Full-text available via subscription   (Followers: 10, SJR: 0.115, CiteScore: 0)
J. of Linguistic Geography     Full-text available via subscription   (Followers: 1)
J. of Linguistics     Hybrid Journal   (Followers: 18, SJR: 0.451, CiteScore: 1)
J. of Management & Organization     Full-text available via subscription   (Followers: 351, SJR: 0.543, CiteScore: 1)
J. of Mechanics     Hybrid Journal   (Followers: 21, SJR: 0.303, CiteScore: 1)
J. of Modern African Studies     Hybrid Journal   (Followers: 20, SJR: 0.606, CiteScore: 1)
J. of Navigation     Hybrid Journal   (Followers: 251, SJR: 0.493, CiteScore: 2)
J. of Nutritional Science     Open Access   (Followers: 3, SJR: 0.984, CiteScore: 2)
J. of Pacific Rim Psychology     Hybrid Journal   (Followers: 1, SJR: 0.33, CiteScore: 1)
J. of Paleontology     Hybrid Journal   (Followers: 11, SJR: 0.882, CiteScore: 2)
J. of Pension Economics & Finance     Hybrid Journal   (Followers: 7, SJR: 0.931, CiteScore: 1)
J. of Plasma Physics     Hybrid Journal   (Followers: 23, SJR: 0.441, CiteScore: 1)
J. of Psychiatric Intensive Care     Hybrid Journal   (Followers: 8)
J. of Psychologists and Counsellors in Schools     Full-text available via subscription   (Followers: 8, SJR: 0, CiteScore: 1)
J. of Public Policy     Hybrid Journal   (Followers: 27, SJR: 0.542, CiteScore: 1)
J. of Race, Ethnicity, and Politics     Full-text available via subscription   (Followers: 4)
J. of Radiotherapy in Practice     Hybrid Journal   (Followers: 7, SJR: 0.16, CiteScore: 0)
J. of Relationships Research     Hybrid Journal   (Followers: 5, SJR: 0.294, CiteScore: 0)
J. of Roman Archaeology     Hybrid Journal   (Followers: 22, SJR: 0.341, CiteScore: 1)
J. of Roman Studies     Full-text available via subscription   (Followers: 22, SJR: 0.182, CiteScore: 0)
J. of Smoking Cessation     Hybrid Journal   (Followers: 6, SJR: 0.411, CiteScore: 0)
J. of Social Policy     Hybrid Journal   (Followers: 41, SJR: 1.063, CiteScore: 2)
J. of Southeast Asian Studies     Full-text available via subscription   (Followers: 12, SJR: 0.14, CiteScore: 0)
J. of Symbolic Logic     Hybrid Journal   (Followers: 1, SJR: 1.057, CiteScore: 1)
J. of the American Philosophical Association     Hybrid Journal   (SJR: 0.857, CiteScore: 1)
J. of the Australian Mathematical Society     Full-text available via subscription   (SJR: 0.46, CiteScore: 1)
J. of the Gilded Age and Progressive Era     Full-text available via subscription   (Followers: 8, SJR: 0.192, CiteScore: 0)
J. of the History of Economic Thought     Full-text available via subscription   (Followers: 14, SJR: 0.784, CiteScore: 1)
J. of the Institute of Mathematics of Jussieu     Hybrid Journal   (SJR: 2.393, CiteScore: 1)
J. of the Intl. Neuropsychological Society     Hybrid Journal   (Followers: 14, SJR: 1.408, CiteScore: 3)
J. of the Intl. Phonetic Association     Full-text available via subscription   (Followers: 2, SJR: 0.27, CiteScore: 1)
J. of the Marine Biological Association of the UK     Hybrid Journal   (Followers: 23, SJR: 0.548, CiteScore: 1)
J. of the Royal Asiatic Society     Hybrid Journal   (Followers: 14, SJR: 0.121, CiteScore: 0)
J. of the Society for American Music     Hybrid Journal   (Followers: 10, SJR: 0.199, CiteScore: 0)
J. of Tropical Ecology     Hybrid Journal   (Followers: 15, SJR: 0.626, CiteScore: 1)
J. of Tropical Psychology     Hybrid Journal   (Followers: 1)
J. of Wine Economics     Full-text available via subscription   (Followers: 5)
Japanese J. of Political Science     Hybrid Journal   (Followers: 8, SJR: 0.372, CiteScore: 1)
Kantian Review     Full-text available via subscription   (Followers: 3)
Knowledge Engineering Review     Hybrid Journal   (Followers: 2, SJR: 0.357, CiteScore: 2)
Language and Cognition     Hybrid Journal   (Followers: 22)
Language in Society     Hybrid Journal   (Followers: 22, SJR: 1.466, CiteScore: 2)
Language Teaching     Hybrid Journal   (Followers: 32, SJR: 1.233, CiteScore: 2)
Language Variation and Change     Hybrid Journal   (Followers: 9, SJR: 0.854, CiteScore: 1)
Laser and Particle Beams     Hybrid Journal   (Followers: 2, SJR: 0.497, CiteScore: 1)
Law and History Review     Full-text available via subscription   (Followers: 15, SJR: 0.184, CiteScore: 0)
Legal Information Management     Hybrid Journal   (Followers: 10)
Legal Theory     Hybrid Journal   (Followers: 13, SJR: 0.484, CiteScore: 1)
Leiden J. of Intl. Law     Hybrid Journal   (Followers: 37, SJR: 0.482, CiteScore: 0)
Libyan Studies     Hybrid Journal   (Followers: 1, SJR: 0.111, CiteScore: 0)
LMS J. of Computation and Mathematics     Free   (SJR: 0.229, CiteScore: 1)
Macroeconomic Dynamics     Hybrid Journal   (Followers: 25, SJR: 1.169, CiteScore: 1)
Management and Organization Review     Hybrid Journal   (Followers: 12, SJR: 0.816, CiteScore: 2)
Mathematical Proceedings of the Cambridge Philosophical Society     Full-text available via subscription   (Followers: 1, SJR: 1.086, CiteScore: 1)
Mathematical Structures in Computer Science     Hybrid Journal   (Followers: 3, SJR: 0.298, CiteScore: 1)
Medical History     Hybrid Journal   (Followers: 7, SJR: 0.417, CiteScore: 1)
Microscopy and Microanalysis     Full-text available via subscription   (Followers: 2, SJR: 0.292, CiteScore: 0)
Modern Asian Studies     Hybrid Journal   (Followers: 15, SJR: 0.397, CiteScore: 0)
Modern Intellectual History     Hybrid Journal   (Followers: 16, SJR: 0.218, CiteScore: 0)
MRS Communications     Hybrid Journal   (SJR: 1.443, CiteScore: 3)
MRS Energy & Sustainability - A Review J.     Full-text available via subscription  
Nagoya Mathematical J.     Hybrid Journal   (SJR: 0.892, CiteScore: 1)
Natural Language Engineering     Hybrid Journal   (Followers: 4, SJR: 0.264, CiteScore: 1)
Netherlands J. of Geosciences     Hybrid Journal   (SJR: 0.285, CiteScore: 1)
Netherlands Yearbook of Intl. Law     Full-text available via subscription   (Followers: 15, SJR: 0.196, CiteScore: 0)
Network Science     Hybrid Journal   (Followers: 5, SJR: 0.461, CiteScore: 1)
Neuron Glia Biology     Hybrid Journal  
New Perspectives on Turkey     Full-text available via subscription   (Followers: 3, SJR: 0.111, CiteScore: 0)
New Surveys in the Classics     Full-text available via subscription   (Followers: 3)
New Testament Studies     Hybrid Journal   (Followers: 33, SJR: 0.316, CiteScore: 0)
New Theatre Quarterly     Hybrid Journal   (Followers: 15, SJR: 0.132, CiteScore: 0)
Nineteenth-Century Music Review     Hybrid Journal   (Followers: 6, SJR: 0.1, CiteScore: 0)
Nordic J. of Linguistics     Hybrid Journal   (Followers: 8, SJR: 0.156, CiteScore: 0)
Numerical Mathematics : Theory, Methods and Applications     Full-text available via subscription  
Nurse Prescriber     Full-text available via subscription   (Followers: 5)
Nutrition Research Reviews     Hybrid Journal   (Followers: 13, SJR: 1.756, CiteScore: 5)
Organised Sound     Hybrid Journal   (Followers: 8, SJR: 0.271, CiteScore: 0)
Oryx     Hybrid Journal   (Followers: 19, SJR: 0.981, CiteScore: 2)
Paleobiology     Full-text available via subscription   (Followers: 6, SJR: 1.563, CiteScore: 3)
Palliative & Supportive Care     Hybrid Journal   (Followers: 34, SJR: 0.611, CiteScore: 1)
Papers of the British School at Rome     Full-text available via subscription   (Followers: 19, SJR: 0.13, CiteScore: 0)
Parasitology     Hybrid Journal   (Followers: 4, SJR: 1.194, CiteScore: 2)
Parasitology Open     Open Access  
Personality Neuroscience     Open Access  
Perspectives on Politics     Full-text available via subscription   (Followers: 41, SJR: 2.075, CiteScore: 2)
Philosophy     Full-text available via subscription   (Followers: 14, SJR: 0.331, CiteScore: 0)
Phonology     Hybrid Journal   (Followers: 9, SJR: 0.623, CiteScore: 1)
Plainsong and Medieval Music     Hybrid Journal   (Followers: 8, SJR: 0.114, CiteScore: 0)
Plant Genetic Resources     Hybrid Journal   (Followers: 3, SJR: 0.353, CiteScore: 1)
Polar Record     Hybrid Journal   (Followers: 2, SJR: 0.313, CiteScore: 1)
Political Science Research and Methods     Full-text available via subscription   (Followers: 22)
Politics & Gender     Full-text available via subscription   (Followers: 25, SJR: 0.861, CiteScore: 1)
Politics and Religion     Full-text available via subscription   (Followers: 9, SJR: 0.541, CiteScore: 1)
Popular Music     Hybrid Journal   (Followers: 20, SJR: 0.216, CiteScore: 0)
Powder Diffraction     Full-text available via subscription   (Followers: 1, SJR: 0.319, CiteScore: 1)
Prehospital and Disaster Medicine     Full-text available via subscription   (Followers: 9, SJR: 0.462, CiteScore: 1)
Primary Health Care Research & Development     Open Access   (Followers: 18, SJR: 0.52, CiteScore: 1)
Probability in the Engineering and Informational Sciences     Hybrid Journal   (Followers: 1, SJR: 0.406, CiteScore: 1)
Proceedings of the Edinburgh Mathematical Society     Hybrid Journal   (SJR: 0.695, CiteScore: 1)
Proceedings of the Intl. Astronomical Union     Full-text available via subscription   (Followers: 2, SJR: 0.117, CiteScore: 0)
Proceedings of the Nutrition Society     Hybrid Journal   (Followers: 8, SJR: 1.373, CiteScore: 4)
Proceedings of the Prehistoric Society     Hybrid Journal   (Followers: 9)
Proceedings of the Royal Society of Edinburgh Section A Mathematics     Full-text available via subscription   (SJR: 1.506, CiteScore: 1)
Progress in Neurotherapeutics and Neuropsychopharmacology     Full-text available via subscription  
PS: Political Science & Politics     Full-text available via subscription   (Followers: 38, SJR: 0.665, CiteScore: 1)
Psychological Medicine     Hybrid Journal   (Followers: 18, SJR: 3.274, CiteScore: 5)
Public Health Nutrition     Hybrid Journal   (Followers: 23, SJR: 1.122, CiteScore: 2)
Publications of the Astronomical Society of Australia     Hybrid Journal   (Followers: 2, SJR: 1.237, CiteScore: 2)
Quarterly Reviews of Biophysics     Hybrid Journal   (Followers: 3, SJR: 3.282, CiteScore: 6)
Quaternary Research     Full-text available via subscription   (Followers: 19, SJR: 1.216, CiteScore: 2)
Queensland Review     Full-text available via subscription   (SJR: 0.101, CiteScore: 0)
Radiocarbon     Hybrid Journal   (Followers: 9, SJR: 0.959, CiteScore: 2)
Ramus : Critical Studies in Greek and Roman Literature     Hybrid Journal   (Followers: 5, SJR: 0.201, CiteScore: 0)
ReCALL     Hybrid Journal   (Followers: 4, SJR: 2.813, CiteScore: 3)
Religious Studies     Hybrid Journal   (Followers: 12, SJR: 0.172, CiteScore: 0)
Renewable Agriculture and Food Systems     Hybrid Journal   (Followers: 15, SJR: 0.593, CiteScore: 2)
Review of Intl. Studies     Full-text available via subscription   (Followers: 27, SJR: 1.63, CiteScore: 2)
Review of Middle East Studies     Full-text available via subscription   (Followers: 10, SJR: 0.101, CiteScore: 0)
Review of Politics     Full-text available via subscription   (Followers: 5, SJR: 0.119, CiteScore: 0)
Review of Symbolic Logic     Full-text available via subscription   (Followers: 2, SJR: 1.049, CiteScore: 1)
Reviews in Clinical Gerontology     Hybrid Journal   (Followers: 5)
Revista de Historia Económica     Full-text available via subscription   (Followers: 1, SJR: 0.221, CiteScore: 0)
Revista Internacional de la Cruz Roja     Full-text available via subscription   (Followers: 2)
Robotica     Hybrid Journal   (Followers: 3, SJR: 0.375, CiteScore: 1)
Royal Institute of Philosophy Supplements     Full-text available via subscription   (Followers: 4)
Rural History     Hybrid Journal   (Followers: 14, SJR: 0.145, CiteScore: 0)
Science in Context     Hybrid Journal   (Followers: 3, SJR: 0.265, CiteScore: 0)
Scottish J. of Theology     Hybrid Journal   (Followers: 38, SJR: 0.177, CiteScore: 0)
Seed Science Research     Hybrid Journal   (Followers: 2, SJR: 0.95, CiteScore: 2)
Slavic Review     Hybrid Journal   (Followers: 8, SJR: 0.395, CiteScore: 1)
Social Philosophy and Policy     Full-text available via subscription   (Followers: 22, SJR: 0.253, CiteScore: 1)
Social Policy and Society     Hybrid Journal   (Followers: 187, SJR: 0.653, CiteScore: 1)
Social Science History     Full-text available via subscription   (Followers: 16, SJR: 0.2, CiteScore: 0)
Spanish J. of Psychology     Hybrid Journal  
Studies in American Political Development     Hybrid Journal   (Followers: 5, SJR: 0.204, CiteScore: 0)
Studies in Church History     Full-text available via subscription   (Followers: 1)
Studies in Second Language Acquisition     Hybrid Journal   (Followers: 40, SJR: 1.516, CiteScore: 2)
Tempo     Hybrid Journal   (Followers: 2, SJR: 0.151, CiteScore: 0)
Thalamus & Related Systems     Full-text available via subscription  
The Americas : A Quarterly Review of Latin American History     Full-text available via subscription   (Followers: 5, SJR: 0.305, CiteScore: 0)
The Lichenologist     Hybrid Journal   (Followers: 5, SJR: 1.113, CiteScore: 2)
The Mathematical Gazette     Full-text available via subscription   (Followers: 1)
Theatre Research Intl.     Full-text available via subscription   (Followers: 14, SJR: 0.204, CiteScore: 0)
Theatre Survey     Full-text available via subscription   (Followers: 11, SJR: 0.121, CiteScore: 0)
Theory and Practice of Logic Programming     Hybrid Journal   (Followers: 3, SJR: 0.524, CiteScore: 2)
Think     Full-text available via subscription   (Followers: 6)
TRaNS : Trans-Regional-and-National Studies of Southeast Asia     Full-text available via subscription   (Followers: 6, SJR: 0.192, CiteScore: 0)
Transactions of the Royal Historical Society     Hybrid Journal   (Followers: 15, SJR: 0.419, CiteScore: 0)
Transnational Environmental Law     Hybrid Journal   (Followers: 5, SJR: 0.498, CiteScore: 1)
Twentieth-century music     Hybrid Journal   (Followers: 4, SJR: 0.453, CiteScore: 1)
Twin Research and Human Genetics     Full-text available via subscription   (SJR: 0.72, CiteScore: 1)
Urban History     Hybrid Journal   (Followers: 18, SJR: 0.358, CiteScore: 0)
Utilitas     Hybrid Journal   (Followers: 7, SJR: 0.712, CiteScore: 0)
Victorian Literature and Culture     Hybrid Journal   (Followers: 21, SJR: 0.163, CiteScore: 0)
Visual Neuroscience     Hybrid Journal   (Followers: 7, SJR: 1.012, CiteScore: 2)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
World Politics     Hybrid Journal   (Followers: 211, SJR: 6.544, CiteScore: 4)
World Trade Review     Full-text available via subscription   (Followers: 16, SJR: 0.591, CiteScore: 1)
World's Poultry Science J.     Full-text available via subscription   (Followers: 5, SJR: 0.559, CiteScore: 1)
Yearbook of Intl. Humanitarian Law     Full-text available via subscription   (Followers: 8, SJR: 0.107, CiteScore: 0)
Zygote     Hybrid Journal   (Followers: 1, SJR: 0.387, CiteScore: 1)

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Similar Journals
Journal Cover
Journal of Plasma Physics
Journal Prestige (SJR): 0.441
Citation Impact (citeScore): 1
Number of Followers: 23  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0022-3778 - ISSN (Online) 1469-7807
Published by Cambridge University Press Homepage  [386 journals]
  • Improved performance of stellarator coil design optimization
    • Authors: Jim-Felix Lobsien; Michael Drevlak, Thomas Kruger, Samuel Lazerson, Caoxiang Zhu, Thomas Sunn Pedersen
      Abstract: Following up on earlier work which demonstrated an improved numerical stellarator coil design optimization performance by the use of stochastic optimization (Lobsien et al., Nucl. Fusion, vol. 58 (10), 2018, 106013), it is demonstrated here that significant further improvements can be made – lower field errors and improved robustness – for a Wendelstein 7-X test case. This is done by increasing the sample size and applying fully three-dimensional perturbations, but most importantly, by changing the design sequence in which the optimization targets are applied: optimization for field error is conducted first, with coil shape penalties only added to the objective function at a later step in the design process. A robust, feasible coil configuration with a local maximum field error of 3.66 % and an average field error of 0.95 % is achieved here, as compared to a maximum local field error of 6.08 % and average field error of 1.56 % found in our earlier work. These new results are compared to those found without stochastic optimization using the FOCUS and ONSET suites. The relationship between local minima in the optimization space and coil shape penalties is also discussed.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000227
      Issue No: Vol. 86, No. 2 (2020)
  • The growth of the longitudinal beam–plasma instability in the presence
           of an inhomogeneous background
    • Authors: Mohamad Shalaby; Avery E. Broderick, Philip Chang, Christoph Pfrommer, Ewald Puchwein, Astrid Lamberts
      Abstract: We study the longitudinal stability of beam–plasma systems in the presence of a density inhomogeneity in the background plasma. Previous works have focused on the non-relativistic regime where hydrodynamical models are used to evolve pre-existing Langmuir waves within inhomogeneous background plasmas. Here, for the first time we study the problem with kinetic equations in a fully relativistic way. We do not assume the existence of Langmuir waves, and we focus on the rate and the mechanism by which waves are excited in such systems from an initial perturbation. We derive the structure of the unstable modes and compute an analytical approximation for their growth rates. Our computation is limited to dilute and cold beams, and shows an excellent agreement with particle-in-cell simulations performed using the SHARP code. We show that, due to such an inhomogeneity, the virulent beam–plasma instabilities in the intergalactic medium are not suppressed but their counterparts in the solar wind can be suppressed as evidenced by propagating type-III solar radio bursts.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000215
      Issue No: Vol. 86, No. 2 (2020)
  • Accelerated methods for direct computation of fusion alpha particle losses
           within, stellarator optimization
    • Authors: Christopher G. Albert; Sergei V. Kasilov, Winfried Kernbichler
      Abstract: Accelerated statistical computation of collisionless fusion alpha particle losses in stellarator configurations is presented based on direct guiding-centre orbit tracing. The approach relies on the combination of recently developed symplectic integrators in canonicalized magnetic flux coordinates and early classification into regular and chaotic orbit types. Only chaotic orbits have to be traced up to the end, as their behaviour is unpredictable. An implementation of this technique is provided in the code SIMPLE (symplectic integration methods for particle loss estimation, Albert et al., 2020b, doi:10.5281/zenodo.3666820). Reliable results were obtained for an ensemble of 1000 orbits in a quasi-isodynamic, a quasi-helical and a quasi-axisymmetric configuration. Overall, a computational speed up of approximately one order of magnitude is achieved compared to direct integration via adaptive Runge–Kutta methods. This reduces run times to the range of typical magnetic equilibrium computations and makes direct alpha particle loss computation adequate for use within a stellarator optimization loop.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000203
      Issue No: Vol. 86, No. 2 (2020)
  • Eliminating turbulent self-interaction through the parallel boundary
           condition in local gyrokinetic simulations
    • Authors: Justin Ball; Stephan Brunner, Ajay C.J.
      Abstract: In this work, we highlight an issue that may reduce the accuracy of many local nonlinear gyrokinetic simulations – turbulent self-interaction through the parallel boundary condition. Given a sufficiently long parallel correlation length, individual turbulent eddies can span the full domain and ‘bite their own tails’, thereby altering their statistical properties. Such self-interaction is only modelled accurately when the simulation domain corresponds to a full flux surface, otherwise it is artificially strong. For Cyclone Base Case parameters and typical domain sizes, we find that this mechanism modifies the heat flux by approximately 40 % and it can be even more important. The effect is largest when using kinetic electrons, low magnetic shear and strong turbulence drive (i.e. steep background gradients). It is found that parallel self-interaction can be eliminated by increasing the parallel length and/or the binormal width of the simulation domain until convergence is achieved.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000197
      Issue No: Vol. 86, No. 2 (2020)
  • The effects of electron energy distribution function on the plasma sheath
           structure in the presence of charged nanoparticles
    • Authors: H. Khalilpour; G. Foroutan
      Abstract: The effects of the electron energy distribution function (EEDF) on the structure of a dusty plasma sheath are investigated. Here, it is assumed that the electrons obey a Druyvesteyn-type distribution with a parameter $x$ controlling the shape of the EEDF. The Druyvesteyn-like distribution tends to a Maxwellian distribution as  $x$ varies from 2 to 1. Using the orbital motion limited theory, the incident electron current on the dust is evaluated for a given $x$ . The results of numerical simulations are compared with those of a Maxwellian distribution. It was found that the sheath dynamics depends strongly on the magnitude of $x$ . The sheath thickness increases monotonically with increasing $x$ . However, the absolute dust charge decreases and, as a result, the accelerating ion drag force is weakened and thus the dust number density is enhanced. For a plasma with a Druyvesteyn-like distribution, the Bohm speed is a function of $x$ and increases with increasing $x$ .
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000161
      Issue No: Vol. 86, No. 2 (2020)
  • A gyrokinetic model for the plasma periphery of tokamak devices
    • Authors: B. J. Frei; R. Jorge, P. Ricci
      Abstract: A gyrokinetic model is presented that can properly describe large and small amplitude electromagnetic fluctuations occurring on scale lengths ranging from the electron Larmor radius to the equilibrium perpendicular pressure gradient scale length, and the arbitrarily large deviations from thermal equilibrium that are present in the plasma periphery of tokamak devices. The formulation of the gyrokinetic model is based on a second-order accurate description of the single charged particle dynamics, derived from Lie perturbation theory, where the fast particle gyromotion is decoupled from the slow drifts assuming that the ratio of the ion sound Larmor radius to the perpendicular equilibrium pressure scale length is small. The collective behaviour of the plasma is obtained by a gyrokinetic Boltzmann equation that describes the evolution of the gyroaveraged distribution function. The collisional effects are included by a nonlinear gyrokinetic Dougherty collision operator. The gyrokinetic model is then developed into a set of coupled fluid equations referred to as the gyrokinetic moment hierarchy. To obtain this hierarchy, the gyroaveraged distribution function is expanded onto a Hermite–Laguerre velocity-space polynomial basis. Then, the gyrokinetic equation is projected onto the same basis yielding the spatial and temporal evolution of the Hermite–Laguerre expansion coefficients. A closed set of fluid equations for the lowest-order coefficients is presented. The Hermite–Laguerre projection is performed accurately at arbitrary perpendicular wavenumber values. Finally, the self-consistent evolution of the electromagnetic fields is described by a set of gyrokinetic Maxwell equations derived from a variational principle where the velocity integrals are explicitly evaluated.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000100
      Issue No: Vol. 86, No. 2 (2020)
  • ab+initio ++++++++ ++++++++ ++++++++++++ ++++++++++++++++$\text{ArH}^{+}$ ++++++++++++ ++++++++ +++++potential&rft.title=Journal+of+Plasma+Physics&rft.issn=0022-3778&,+E.+A.+Pazyuk,+A.+V.+Stolyarov&rft_id=info:doi/10.1017/S0022377820000112">The collision cross-sections for proton–argon interaction based on ab
           initio $\text{ArH}^{+}$ potential
    • Authors: V. A. Terashkevich; V. V. Meshkov, E. A. Pazyuk, A. V. Stolyarov
      Abstract: The classical collision cross-sections of a proton with an argon atom as well as the thermal transport coefficients and rate constant of the colliding $\text{H}^{+}-\text{Ar}$ system are evaluated at the kinetic temperature $T\in [100,10\,000]~(\text{K})$ by means of the asymptotically correct analytical potential constructed for the ground $X^{1}\unicode[STIX]{x1D6F4}^{+}$ state of the ArH+ cation from the highly accurate ab initio data available in the entire range of internuclear distances (Terashkevich et al., J. Quant. Spectrosc. Radiat. Transfer, vol. 234, 2019, pp. 139–146). The results can be useful to estimate thermodynamic, transport and kinetic properties of the Ar/H2 plasma in a wide temperature range.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000112
      Issue No: Vol. 86, No. 2 (2020)
  • Plasma expansion towards an electrically insulated surface
    • Authors: Dov J. Rhodes; William M. Farrell
      Abstract: The problem of plasma expansion into a vacuum is revisited with the addition of a finite boundary condition; an electrically insulated surface. As plasma expands towards a charge-accumulating surface, the leading electron cloud charges the surface negatively, which in turn repels electrons and attracts ions. This plasma–surface interaction is shown to result in a feedback process which accelerates the plasma expansion. In addition, we examine the decrease in (negative) surface potential and associated near-surface electron density. To investigate this plasma coupling with an electrically floating surface, we develop an analytic model including four neighbouring plasma regions: (i) undisturbed plasma, (ii) quasi-neutral self-similar expansion, (iii) ion front boundary layer and (iv) electron cloud. A key innovation in our approach is a self-contained analytic approximation of the ion front boundary layer, providing a spatially continuous electric field model for the early phase of bounded plasma expansion.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000148
      Issue No: Vol. 86, No. 2 (2020)
  • On energy confinement following the onset of ‘stiff’ transport
    • Authors: J. W. Connor; R. J. Hastie, K. Richards
      Abstract: The dependence of confinement on input power for a tokamak plasma with regions having a stiff temperature profile is explored. The resilience of the confinement of the core energy to increasing power loss by core radiation from impurities in such situations, as it is anticipated will be required in a demonstration fusion reactor (DEMO) design, is examined.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000136
      Issue No: Vol. 86, No. 2 (2020)
  • Available energy of magnetically confined plasmas
    • Authors: Per Helander
      Abstract: The concept of the available energy of a collisionless plasma is discussed in the context of magnetic confinement. The available energy quantifies how much of the plasma energy can be converted into fluctuations (including nonlinear ones) and is thus a measure of plasma stability, which can be used to derive linear and nonlinear stability criteria without solving an eigenvalue problem. In a magnetically confined plasma, the available energy is determined by the density and temperature profiles as well as the magnetic geometry. It also depends on what constraints limit the possible forms of plasma motion, such as the conservation of adiabatic invariants and the requirement that the transport be ambipolar. A general method based on Lagrange multipliers is devised to incorporate such constraints in the calculation of the available energy, and several particular cases are discussed for which it can be calculated explicitly. In particular, it is shown that it is impossible to confine a plasma in a Maxwellian ground state relative to perturbations with frequencies exceeding the ion bounce frequency.
      PubDate: 2020-04-01T00:00:00.000Z
      DOI: 10.1017/S0022377820000057
      Issue No: Vol. 86, No. 2 (2020)
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