Publication:
Measuring magnetic fields in laser-driven coils with dual-axis proton deflectometry

Дата
2021
Авторы
Bradford, P.
Dearling, A.
Ehret, M.
Antonelli, L.
Pikuz, S.
Ryazantsev, S.
Journal Title
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Научные группы
Организационные подразделения
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Организационная единица
Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
Выпуск журнала
Аннотация
© 2021 The Author(s). Published by IOP Publishing Ltd.By driving hot electrons between two metal plates connected by a wire loop, high power lasers can generate multi-tesla, quasi-static magnetic fields in miniature coil targets. Many experiments involving laser-coil targets rely on proton deflectometry directed perpendicular to the coil axis to extract a measurement of the magnetic field. In this paper, we show that quantitative measurements using perpendicular probing are complicated by the presence of GV m-1 electric fields in the target that develop on sub-ns timescales. Probing parallel to the coil axis with fiducial grids is shown to reliably separate the electric and magnetic field measurements, giving current estimates of I ≈ 5 kA in 1 mm- and 2 mm-diameter wire loops. An analytic model of proton deflection in electric and magnetic fields is used to benchmark results from the particle-in-cell code and help deconvolve the magnetic and electric field deflections. Results are used to motivate a new experimental scheme that combines a single-plate target with axial proton probing and direct current measurements. This scheme has several important advantages over the traditional target and diagnostic set-up, enabling the robust measurement of coil magnetic fields and plasma properties, as well as making it easier to validate different theoretical models at a range of laser intensities.
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Цитирование
Measuring magnetic fields in laser-driven coils with dual-axis proton deflectometry / Bradford, P. [et al.] // Plasma Physics and Controlled Fusion. - 2021. - 63. - № 8. - 10.1088/1361-6587/ac0bca
URI
https://www.doi.org/10.1088/1361-6587/ac0bca
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85109807803&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000669098600001
 https://openrepository.mephi.ru/handle/123456789/24350
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