A B Borisov et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 2167 doi:10.1088/0953-4075/34/11/309
Bifurcation mode of relativistic and charge-displacement self-channelling
A B Borisov1, S Cameron2, T S Luk2, T R Nelson1,2, A J Van Tassle1, J Santoro1, W A Schroeder1, Y Dai1,3, J W Longworth1,4, K Boyer1 and C K Rhodes1
Show affiliationsStable self-channelling of ultra-powerful (P0~1 TW-1 PW) laser pulses in dense plasmas is a key process for many applications requiring the controlled compression of power at high levels. Theoretical computations predict that the transition zone between the stable and highly unstable regimes of relativistic/charge-displacement self-channelling is well characterized by a form of weak instability that involves bifurcation of the propagating energy into two channels. Recent observations of unstable behaviour with femtosecond 248 nm pulses reveal a mode of bifurcation that corresponds well to these theoretical predictions. It is further experimentally shown that the use of a suitable longitudinal gradient in the plasma density can eliminate this unstable response and restore the efficient formation of single stable channels.
- PACS
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52.38.Hb Self-focussing, channeling, and filamentation in plasmas
- Subjects
- Dates
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Issue 11 (14 June 2001)
Received 18 May 2000, in final form 11 April 2001
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Bifurcation mode of relativistic and charge-displacement self-channelling
A B Borisov et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 2167
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Ultrabright multikilovolt coherent tunable x-ray source at λ ~ 2.71–2.93 Å
Alex B Borisov et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 3433
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Pump laser wavelength-dependent control of the efficiency of kilovolt x-ray emission from atomic clusters
W Andreas Schroeder et al 1998 J. Phys. B: At. Mol. Opt. Phys. 31 5031
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Evidence of enhanced multiphoton (248 nm) coupling from single-pulse energy measurements of Xe(L) emission induced from Xe clusters
A McPherson et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L767
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Saturated multikilovolt x-ray amplification with Xe clusters: single-pulse observation of Xe(L) spectral hole burning
Alex B Borisov et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 L285
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Amplification at λ ~ 2.8 Å on
double-vacancy states produced by 248 nm excitation of Xe clusters in plasma channels
Alex B Borisov et al 2005 J. Phys. B: At. Mol. Opt. Phys. 38 3935
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Competition between multiphoton xenon cluster excitation and plasma wave Raman scattering at 248 nm
A McPherson et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 L291
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Dynamical orbital collapse drives super x-ray emission
A B Borisov et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 247
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An efficient, selective collisional ejection mechanism for inner-shell population inversion in laser-driven plasmas
W Andreas Schroeder et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 297
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imaging of Xe(M) and Xe(L) emissions from channelled propagation of intense femtosecond 248 nm pulses in a Xe cluster target
A B Borisov et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 L113
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