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Title: Target surface area effects on hot electron dynamics from high intensity laser–plasma interactions

Abstract

Reduced surface area targets were studied using an ultra-high intensity femtosecond laser in order to determine the effect of electron sheath field confinement on electron dynamics. X-ray emission due to energetic electrons was imaged using a Kα imaging crystal. Electrons were observed to travel along the surface of wire targets, and were slowed mainly by the induced fields. Targets with reduced surface areas were correlated with increased hot electron densities and proton energies. Furthermore, Hybrid Vlasov–Fokker–Planck simulations demonstrated increased electric sheath field strength in reduced surface area targets.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1257285
Alternate Identifier(s):
OSTI ID: 1257287; OSTI ID: 1299137
Grant/Contract Number:  
NA0002372
Resource Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Name: New Journal of Physics Journal Volume: 18 Journal Issue: 6; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United Kingdom
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; laser-plasma; mass-limited; fast electrons; sheath field

Citation Formats

Zulick, C., Raymond, A., McKelvey, A., Chvykov, V., Maksimchuk, A., Thomas, A. G. R., Willingale, L., Yanovsky, V., and Krushelnick, K. Target surface area effects on hot electron dynamics from high intensity laser–plasma interactions. United Kingdom: N. p., 2016. Web. doi:10.1088/1367-2630/18/6/063020.
Zulick, C., Raymond, A., McKelvey, A., Chvykov, V., Maksimchuk, A., Thomas, A. G. R., Willingale, L., Yanovsky, V., & Krushelnick, K. Target surface area effects on hot electron dynamics from high intensity laser–plasma interactions. United Kingdom. https://doi.org/10.1088/1367-2630/18/6/063020
Zulick, C., Raymond, A., McKelvey, A., Chvykov, V., Maksimchuk, A., Thomas, A. G. R., Willingale, L., Yanovsky, V., and Krushelnick, K. Wed . "Target surface area effects on hot electron dynamics from high intensity laser–plasma interactions". United Kingdom. https://doi.org/10.1088/1367-2630/18/6/063020.
@article{osti_1257285,
title = {Target surface area effects on hot electron dynamics from high intensity laser–plasma interactions},
author = {Zulick, C. and Raymond, A. and McKelvey, A. and Chvykov, V. and Maksimchuk, A. and Thomas, A. G. R. and Willingale, L. and Yanovsky, V. and Krushelnick, K.},
abstractNote = {Reduced surface area targets were studied using an ultra-high intensity femtosecond laser in order to determine the effect of electron sheath field confinement on electron dynamics. X-ray emission due to energetic electrons was imaged using a Kα imaging crystal. Electrons were observed to travel along the surface of wire targets, and were slowed mainly by the induced fields. Targets with reduced surface areas were correlated with increased hot electron densities and proton energies. Furthermore, Hybrid Vlasov–Fokker–Planck simulations demonstrated increased electric sheath field strength in reduced surface area targets.},
doi = {10.1088/1367-2630/18/6/063020},
journal = {New Journal of Physics},
number = 6,
volume = 18,
place = {United Kingdom},
year = {2016},
month = {6}
}