Measurement of pulsed-power-driven magnetic fields via proton deflectometry

Measuring magnetic field and current distribution in Z-pinch plasma systems is crucial to the validation of Z-pinch theory. In this letter, the demonstration of proton deflectometry to pulsed-power-driven loads at the mega-amp scale is presented, which is capable of making more detailed field maps i...

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Veröffentlicht in:Applied physics letters 2014-12, Vol.105 (22)
Hauptverfasser: Mariscal, D., McGuffey, C., Valenzuela, J., Wei, M. S., Chittenden, J. P., Niasse, N., Presura, R., Haque, S., Wallace, M., Arias, A., Covington, A., Sawada, H., Wiewior, P., Beg, F. N.
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container_issue 22
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container_title Applied physics letters
container_volume 105
creator Mariscal, D.
McGuffey, C.
Valenzuela, J.
Wei, M. S.
Chittenden, J. P.
Niasse, N.
Presura, R.
Haque, S.
Wallace, M.
Arias, A.
Covington, A.
Sawada, H.
Wiewior, P.
Beg, F. N.
description Measuring magnetic field and current distribution in Z-pinch plasma systems is crucial to the validation of Z-pinch theory. In this letter, the demonstration of proton deflectometry to pulsed-power-driven loads at the mega-amp scale is presented, which is capable of making more detailed field maps in high-density regions of plasmas. In this method, a laser-driven, broad-spectrum, MeV-energy proton beam is directed through a pulsed-power-driven plasma system, and the resulting deflections are measured to examine configuration of magnetic fields and to infer the currents that support them. The technique was first demonstrated on simple short-circuit loads, and the results are in excellent agreement with numerical simulations providing reliable estimates of the field and current configurations. It was then applied to a more complex—radial foil—plasma load. The measurements show unexpected proton deflections that exhibit the complexity of the plasma load and that with further analysis will reveal details about the current and magnetic field topology in this complex configuration.
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S. ; Chittenden, J. P. ; Niasse, N. ; Presura, R. ; Haque, S. ; Wallace, M. ; Arias, A. ; Covington, A. ; Sawada, H. ; Wiewior, P. ; Beg, F. N.</creator><creatorcontrib>Mariscal, D. ; McGuffey, C. ; Valenzuela, J. ; Wei, M. S. ; Chittenden, J. P. ; Niasse, N. ; Presura, R. ; Haque, S. ; Wallace, M. ; Arias, A. ; Covington, A. ; Sawada, H. ; Wiewior, P. ; Beg, F. N.</creatorcontrib><description>Measuring magnetic field and current distribution in Z-pinch plasma systems is crucial to the validation of Z-pinch theory. In this letter, the demonstration of proton deflectometry to pulsed-power-driven loads at the mega-amp scale is presented, which is capable of making more detailed field maps in high-density regions of plasmas. In this method, a laser-driven, broad-spectrum, MeV-energy proton beam is directed through a pulsed-power-driven plasma system, and the resulting deflections are measured to examine configuration of magnetic fields and to infer the currents that support them. 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source AIP Journals Complete; Alma/SFX Local Collection
subjects Applied physics
Complexity
Computer simulation
Configurations
Current distribution
Foils
Laser beams
Magnetic fields
Plasma
Plasmas (physics)
Proton beams
Short circuits
title Measurement of pulsed-power-driven magnetic fields via proton deflectometry
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