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Articles With Citations to Z. Abou-Assaleh

Theoretical Plasma Physics

Controlled Thermonuclear Fusion Energy

2020

Plasma Physics and Controlled Fusion

Plasma Phys. Control. Fusion 62 (2020) 125009 (10pp)

https://doi.org/10.1088/1361-6587/abbec0

Kinetic effects in parallel electron energy transport channels in the scrape-off layer

S Mijin1, F Militello2, S Newton2, J Omotani2 and R J Kingham1

1 Blackett Lab., Plasma Physics Group, Imperial College, London SW7 2AZ, United Kingdom

2 CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom

Abstract

We present an analysis of parallel electron energy transport in the scrape-off layer (SOL), considering the convective and conductive channels, as well as the radiation and neutral inelastic energy transfer channels involving atomic deuterium. Kinetic effects in both equilibria and conductive transients are explored by utilizing the capability of the SOL-KiT code to treat electrons as either a fluid or kinetically. We find kinetic effects in multiple channels, with an emphasis on those occurring during the investigated conductive transients. Energetic electron effects in the heat flux, as well as a modification of ionization rates of up to 40% compared to Maxwellian rates during perturbations in detached conditions, are reported and discussed.

Keywords: kinetic, fluid, electron, scrape-off layer, energy transport, parallel, detachment

References

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[7] Abou-Assaleh Z, Petravic M, Vesey R, Matte J P and Johnston T W 1994 Non-local transport in a tokamak plasma divertor with recycling Contrib. Plasma Phys.

34 175–9

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Effect of background fluctuation on velocity diagnostics by Mach probe

WEI, Yunxiao (Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China);

GAO, Zhe (Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China)
 

Abstract

The effect of background fluctuation on velocity diagnostics is discussed and studied. The kinetic theory of Mach probe (MP) and the theory of BGK mode are combined to evaluate how the measurement of MP is affected by electrostatics fluctuation. It is found that the quantity of speed by the MP model is closer to the effective velocity in the picture of momentum flux rather than the real mean velocity, while, with high fluctuation, the fitting parameter of MP's exponential formula should be corrected.

Publication:
Plasma Science and Technology, Volume 22, Issue 12, id.125102, 6 pp.
Pub Date: December 2020 DOI: 10.1088/2058-6272/abbb79 Bibcode: 2020PlST...22l5102W Keywords:
velocity diagnostics; Mach probe; electrostatic fluctuation

https://iopscience.iop.org/

article/10.1088/2058-6272/abbb79

https://iopscience.iop.org/

article/10.1088/2058-6272/abbb79/meta

http://pst.hfcas.ac.cn/EN/

abstract/abstract10515.shtml

Electron heat conduction in ICF targets

JR Sanmartin - Nuclear Fusion by Inertial Confinement, 2020 - books.google.com

As noted in foregoing chapters of this book, electron heat transport is a crucial part of the physics in direct-drive laser fusion, that is, in targets that do not produce a copious X-ray population. Since the plasma ablated from a target is flowing outward, heat conduction is the …
 

https://www.taylorfrancis.com

ABSTRACT

The systematic analysis of transport that considered arbitrary differences between ion and electron temperatures and velocities was carried out by Braginskii. This chapter discusses the similarities and differences between transport processes in plasmas and in neutral gas mixtures; this will help in clarifying approaches to the kinetics of plasma transport that can be found in related literature. A self-consistent transport model for Lorentzian plasmas was given by Albritton et al. Standard transport theory is applicable when the characteristic macroscopic length is larger than the mean free path for collisions that lead to a Maxwellian distribution. A direct numerical calculation of the departure of the distribution function from a local Maxwellian was first performed by Spitzer and Harm.

http://oa.upm.es/26152/1/SM6.pdf

https://books.google.ca/

Nuclear Fusion by Inertial Confinement

About

Nuclear Fusion by Inertial Confinement provides a comprehensive analysis of directly driven inertial confinement fusion. All important aspects of the process are covered, including scientific considerations that support the concept, lasers and particle beams as drivers, target fabrication, analytical and numerical calculations, and materials and engineering considerations. Authors from Australia, Germany, Italy, Japan, Russia, Spain, and the U.S. have contributed to the volume, making it an internationally significant work for all scientists working in the Inertial Confinement Fusion (ICF) field, as well as for graduate students in engineering and physics with interest in ICF.

https://www.routledge.com/

https://www.chapters.indigo.ca/

https://ui.adsabs.harvard.edu/

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