Controlling fast-electron-beam divergence using two laser pulses

R. H. H. Scott, C. Beaucourt, H. -P. Schlenvoigt, K. Markey, K. L. Lancaster, C. P. Ridgers, C. M. Brenner, J. Pasley, R. J. Gray, I. O. Musgrave, A. P. L. Robinson, K. Li, M. M. Notley, J. R. Davies, S. D. Baton, J. J. Santos, J. -L. Feugeas, Ph. Nicolai, G. Malka, V. T. Tikhonchuk & 4 others P. McKenna, D. Neely, S. J. Rose, P. A. Norreys

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

This Letter describes the first experimental demonstration of the guiding of a relativistic electron beam in a solid target using two colinear, relativistically intense, picosecond laser pulses. The first pulse creates a magnetic field that guides the higher-current, fast-electron beam generated by the second pulse. The effects of intensity ratio, delay, total energy, and intrinsic prepulse are examined. Thermal and K alpha imaging show reduced emission size, increased peak emission, and increased total emission at delays of 4-6 ps, an intensity ratio of 10:1 (second: first) and a total energy of 186 J. In comparison to a single, high-contrast shot, the inferred fast-electron divergence is reduced by 2.7 times, while the fast-electron current density is increased by a factor of 1.8. The enhancements are reproduced with modeling and are shown to be due to the self-generation of magnetic fields. Such a scheme could be of considerable benefit to fast-ignition inertial fusion.

LanguageEnglish
Article number015001
Number of pages5
JournalPhysical Review Letters
Volume109
Issue number1
DOIs
Publication statusPublished - 6 Jul 2012

Fingerprint

divergence
electron beams
pulses
lasers
relativistic electron beams
magnetic fields
ignition
shot
high current
electrons
current density
energy
augmentation

Keywords

  • vulcan petawatt
  • facility
  • ignition
  • preamplifier
  • high-gain
  • fast-electron-beam
  • divergence
  • two laser pulses
  • control

Cite this

Scott, R. H. H., Beaucourt, C., Schlenvoigt, H. -P., Markey, K., Lancaster, K. L., Ridgers, C. P., ... Norreys, P. A. (2012). Controlling fast-electron-beam divergence using two laser pulses. Physical Review Letters, 109(1), [015001]. https://doi.org/10.1103/PhysRevLett.109.015001
Scott, R. H. H. ; Beaucourt, C. ; Schlenvoigt, H. -P. ; Markey, K. ; Lancaster, K. L. ; Ridgers, C. P. ; Brenner, C. M. ; Pasley, J. ; Gray, R. J. ; Musgrave, I. O. ; Robinson, A. P. L. ; Li, K. ; Notley, M. M. ; Davies, J. R. ; Baton, S. D. ; Santos, J. J. ; Feugeas, J. -L. ; Nicolai, Ph. ; Malka, G. ; Tikhonchuk, V. T. ; McKenna, P. ; Neely, D. ; Rose, S. J. ; Norreys, P. A. / Controlling fast-electron-beam divergence using two laser pulses. In: Physical Review Letters. 2012 ; Vol. 109, No. 1.
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abstract = "This Letter describes the first experimental demonstration of the guiding of a relativistic electron beam in a solid target using two colinear, relativistically intense, picosecond laser pulses. The first pulse creates a magnetic field that guides the higher-current, fast-electron beam generated by the second pulse. The effects of intensity ratio, delay, total energy, and intrinsic prepulse are examined. Thermal and K alpha imaging show reduced emission size, increased peak emission, and increased total emission at delays of 4-6 ps, an intensity ratio of 10:1 (second: first) and a total energy of 186 J. In comparison to a single, high-contrast shot, the inferred fast-electron divergence is reduced by 2.7 times, while the fast-electron current density is increased by a factor of 1.8. The enhancements are reproduced with modeling and are shown to be due to the self-generation of magnetic fields. Such a scheme could be of considerable benefit to fast-ignition inertial fusion.",
keywords = "vulcan petawatt , facility, ignition , preamplifier, high-gain, fast-electron-beam , divergence, two laser pulses, control",
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Scott, RHH, Beaucourt, C, Schlenvoigt, H-P, Markey, K, Lancaster, KL, Ridgers, CP, Brenner, CM, Pasley, J, Gray, RJ, Musgrave, IO, Robinson, APL, Li, K, Notley, MM, Davies, JR, Baton, SD, Santos, JJ, Feugeas, J-L, Nicolai, P, Malka, G, Tikhonchuk, VT, McKenna, P, Neely, D, Rose, SJ & Norreys, PA 2012, 'Controlling fast-electron-beam divergence using two laser pulses' Physical Review Letters, vol. 109, no. 1, 015001. https://doi.org/10.1103/PhysRevLett.109.015001

Controlling fast-electron-beam divergence using two laser pulses. / Scott, R. H. H.; Beaucourt, C.; Schlenvoigt, H. -P.; Markey, K.; Lancaster, K. L.; Ridgers, C. P.; Brenner, C. M.; Pasley, J.; Gray, R. J.; Musgrave, I. O.; Robinson, A. P. L.; Li, K.; Notley, M. M.; Davies, J. R.; Baton, S. D.; Santos, J. J.; Feugeas, J. -L.; Nicolai, Ph.; Malka, G.; Tikhonchuk, V. T.; McKenna, P.; Neely, D.; Rose, S. J.; Norreys, P. A.

In: Physical Review Letters, Vol. 109, No. 1, 015001, 06.07.2012.

Research output: Contribution to journalArticle

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AU - Scott, R. H. H.

AU - Beaucourt, C.

AU - Schlenvoigt, H. -P.

AU - Markey, K.

AU - Lancaster, K. L.

AU - Ridgers, C. P.

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AU - Li, K.

AU - Notley, M. M.

AU - Davies, J. R.

AU - Baton, S. D.

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AU - Feugeas, J. -L.

AU - Nicolai, Ph.

AU - Malka, G.

AU - Tikhonchuk, V. T.

AU - McKenna, P.

AU - Neely, D.

AU - Rose, S. J.

AU - Norreys, P. A.

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N2 - This Letter describes the first experimental demonstration of the guiding of a relativistic electron beam in a solid target using two colinear, relativistically intense, picosecond laser pulses. The first pulse creates a magnetic field that guides the higher-current, fast-electron beam generated by the second pulse. The effects of intensity ratio, delay, total energy, and intrinsic prepulse are examined. Thermal and K alpha imaging show reduced emission size, increased peak emission, and increased total emission at delays of 4-6 ps, an intensity ratio of 10:1 (second: first) and a total energy of 186 J. In comparison to a single, high-contrast shot, the inferred fast-electron divergence is reduced by 2.7 times, while the fast-electron current density is increased by a factor of 1.8. The enhancements are reproduced with modeling and are shown to be due to the self-generation of magnetic fields. Such a scheme could be of considerable benefit to fast-ignition inertial fusion.

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KW - vulcan petawatt

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KW - control

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Scott RHH, Beaucourt C, Schlenvoigt H-P, Markey K, Lancaster KL, Ridgers CP et al. Controlling fast-electron-beam divergence using two laser pulses. Physical Review Letters. 2012 Jul 6;109(1). 015001. https://doi.org/10.1103/PhysRevLett.109.015001