RT info:eu-repo/semantics/article
T1 Amplification of laser imprint in the presence of strong, externally imposed, target-normal magnetic fields
A1 Ceurvorst, L.
A1 Walsh, C.
A1 Pérez Callejo, Gabriel
A1 Bouffetier, V.
A1 Bradford, P.
A1 Peebles, J. L.
A1 Hu, S.
A1 Theobald, W.
A1 Casner, A.
AB An experiment was performed on the OMEGA EP Laser System to investigate the effects of magnetic fields on laser imprint. A 30 µ⁢m thick CH target was driven by a single beam delivering 3.0 kJ of UV energy in a 5 ns square pulse without smoothing by spectral dispersion. The Rayleigh-Taylor amplification of this beam's imprint on the target surface was monitored using face-on gated x-ray radiography from a Gd backlighter. Magnetic fields of up to 45T were applied normal to the target surface. Analysis of the resulting radiographs shows a 60±13% increase in the spectrally resolved surface perturbation amplitudes, consistent at all times and for all unsaturated frequencies. This consistency indicates that the increase in perturbation amplitudes was due to a change in the initial amplitudes rather than Rayleigh-Taylor growth. This is supported by the trajectory of individual modes and the inferred time-averaged perturbation growth rates. Laser imprint is therefore inferred to have increased due to strong magnetic fields that remain in the conduction zone of the target, suppressing off-axis electron motion and limiting the effects of thermal smoothing.
PB American Physical Society
SN 2470-0053
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/79602
UL https://uvadoc.uva.es/handle/10324/79602
LA eng
NO Physical Review E, noviembre 2025, vol. 112, n. 5, p. 055204
NO Producción Científica
DS UVaDOC
RD 12-nov-2025