Imperial College London
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Prof. Jeremy Chittenden

Faculty of Natural Sciences, Department of Physics

Professor of Plasma Physics
 
 
 
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Contact

 

+44 (0)20 7594 7654j.chittenden Website

 
 
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Location

 

744Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Walsh:2022:1361-6587/ac3f25,
author = {Walsh, CA and Florido, R and Bailly-Grandvaux, M and Suzuki-Vidal, F and Chittenden, JP and Crilly, AJ and Gigosos, MA and Mancini, RC and Perez-Callejo, G and Vlachos, C and McGuffey, C and Beg, FN and Santos, JJ},
doi = {1361-6587/ac3f25},
journal = {Plasma Physics and Controlled Fusion},
pages = {1--19},
title = {Exploring extreme magnetization phenomena in directly driven imploding cylindrical targets},
url = {http://dx.doi.org/10.1088/1361-6587/ac3f25},
volume = {64},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This paper uses extended-magnetohydrodynamics (MHD) simulations to explore an extreme magnetized plasma regime realizable by cylindrical implosions on the OMEGA laser facility. This regime is characterized by highly compressed magnetic fields (greater than 10 kT across the fuel), which contain a significant proportion of the implosion energy and induce large electrical currents in the plasma. Parameters governing the different magnetization processes such as Ohmic dissipation and suppression of instabilities by magnetic tension are presented, allowing for optimization of experiments to study specific phenomena. For instance, a dopant added to the target gas-fill can enhance magnetic flux compression while enabling spectroscopic diagnosis of the imploding core. In particular, the use of Ar K-shell spectroscopy is investigated by performing detailed non-LTE atomic kinetics and radiative transfer calculations on the MHD data. Direct measurement of the core electron density and temperature would be possible, allowing for both the impact of magnetization on the final temperature and thermal pressure to be obtained. By assuming the magnetic field is frozen into the plasma motion, which is shown to be a good approximation for highly magnetized implosions, spectroscopic diagnosis could be used to estimate which magnetization processes are ruling the implosion dynamics; for example, a relation is given for inferring whether thermally driven or current-driven transport is dominating.
AU  - Walsh,CA
AU  - Florido,R
AU  - Bailly-Grandvaux,M
AU  - Suzuki-Vidal,F
AU  - Chittenden,JP
AU  - Crilly,AJ
AU  - Gigosos,MA
AU  - Mancini,RC
AU  - Perez-Callejo,G
AU  - Vlachos,C
AU  - McGuffey,C
AU  - Beg,FN
AU  - Santos,JJ
DO  - 1361-6587/ac3f25
EP  - 19
PY  - 2022///
SN  - 0741-3335
SP  - 1
TI  - Exploring extreme magnetization phenomena in directly driven imploding cylindrical targets
T2  - Plasma Physics and Controlled Fusion
UR  - http://dx.doi.org/10.1088/1361-6587/ac3f25
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000741709400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://iopscience.iop.org/article/10.1088/1361-6587/ac3f25
UR  - http://hdl.handle.net/10044/1/94099
VL  - 64
ER  -
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