Demonstration of passive plasma lensing of a laser wakefield accelerated electron bunch

S. Kuschel, D. Hollatz, T. Heinemann, O. Karger, M. B. Schwab, D. Ullmann, A. Knetsch, A. Seidel, C. Rödel, M. Yeung, M. Leier, A. Blinne, H. Ding, T. Kurz, D. J. Corvan, A. Sävert, S. Karsch, M. C. Kaluza, B. Hidding, M. Zepf

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report on the first demonstration of passive all-optical plasma lensing using a two-stage setup. An intense femtosecond laser accelerates electrons in a laser wakefield accelerator (LWFA) to 100 MeV over millimeter length scales. By adding a second gas target behind the initial LWFA stage we introduce a robust and independently tunable plasma lens. We observe a density dependent reduction of the LWFA electron beam divergence from an initial value of 2.3 mrad, down to 1.4 mrad (rms), when the plasma lens is in operation. Such a plasma lens provides a simple and compact approach for divergence reduction well matched to the mm-scale length of the LWFA accelerator. The focusing forces are provided solely by the plasma and driven by the bunch itself only, making this a highly useful and conceptually new approach to electron beam focusing. Possible applications of this lens are not limited to laser plasma accelerators. Since no active driver is needed the passive plasma lens is also suited for high repetition rate focusing of electron bunches. Its understanding is also required for modeling the evolution of the driving particle bunch in particle driven wake field acceleration.

LanguageEnglish
Article number071301
Number of pages9
JournalPhysical Review Accelerators and Beams
Volume19
Issue number7
DOIs
Publication statusPublished - 1 Jul 2016

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accelerators
lenses
lasers
electrons
divergence
electron beams
plasma accelerators
laser plasmas
wakes
repetition
gases

Keywords

  • laser wakefield accelerated electron bunch
  • passive all-optical plasma lensing
  • laser wakefield accelerator
  • LWFA
  • plasma

Cite this

Kuschel, S. ; Hollatz, D. ; Heinemann, T. ; Karger, O. ; Schwab, M. B. ; Ullmann, D. ; Knetsch, A. ; Seidel, A. ; Rödel, C. ; Yeung, M. ; Leier, M. ; Blinne, A. ; Ding, H. ; Kurz, T. ; Corvan, D. J. ; Sävert, A. ; Karsch, S. ; Kaluza, M. C. ; Hidding, B. ; Zepf, M. / Demonstration of passive plasma lensing of a laser wakefield accelerated electron bunch. In: Physical Review Accelerators and Beams. 2016 ; Vol. 19, No. 7.
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Kuschel, S, Hollatz, D, Heinemann, T, Karger, O, Schwab, MB, Ullmann, D, Knetsch, A, Seidel, A, Rödel, C, Yeung, M, Leier, M, Blinne, A, Ding, H, Kurz, T, Corvan, DJ, Sävert, A, Karsch, S, Kaluza, MC, Hidding, B & Zepf, M 2016, 'Demonstration of passive plasma lensing of a laser wakefield accelerated electron bunch' Physical Review Accelerators and Beams, vol. 19, no. 7, 071301. https://doi.org/10.1103/PhysRevAccelBeams.19.071301

Demonstration of passive plasma lensing of a laser wakefield accelerated electron bunch. / Kuschel, S.; Hollatz, D.; Heinemann, T.; Karger, O.; Schwab, M. B.; Ullmann, D.; Knetsch, A.; Seidel, A.; Rödel, C.; Yeung, M.; Leier, M.; Blinne, A.; Ding, H.; Kurz, T.; Corvan, D. J.; Sävert, A.; Karsch, S.; Kaluza, M. C.; Hidding, B.; Zepf, M.

In: Physical Review Accelerators and Beams, Vol. 19, No. 7, 071301, 01.07.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Demonstration of passive plasma lensing of a laser wakefield accelerated electron bunch

AU - Kuschel, S.

AU - Hollatz, D.

AU - Heinemann, T.

AU - Karger, O.

AU - Schwab, M. B.

AU - Ullmann, D.

AU - Knetsch, A.

AU - Seidel, A.

AU - Rödel, C.

AU - Yeung, M.

AU - Leier, M.

AU - Blinne, A.

AU - Ding, H.

AU - Kurz, T.

AU - Corvan, D. J.

AU - Sävert, A.

AU - Karsch, S.

AU - Kaluza, M. C.

AU - Hidding, B.

AU - Zepf, M.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - We report on the first demonstration of passive all-optical plasma lensing using a two-stage setup. An intense femtosecond laser accelerates electrons in a laser wakefield accelerator (LWFA) to 100 MeV over millimeter length scales. By adding a second gas target behind the initial LWFA stage we introduce a robust and independently tunable plasma lens. We observe a density dependent reduction of the LWFA electron beam divergence from an initial value of 2.3 mrad, down to 1.4 mrad (rms), when the plasma lens is in operation. Such a plasma lens provides a simple and compact approach for divergence reduction well matched to the mm-scale length of the LWFA accelerator. The focusing forces are provided solely by the plasma and driven by the bunch itself only, making this a highly useful and conceptually new approach to electron beam focusing. Possible applications of this lens are not limited to laser plasma accelerators. Since no active driver is needed the passive plasma lens is also suited for high repetition rate focusing of electron bunches. Its understanding is also required for modeling the evolution of the driving particle bunch in particle driven wake field acceleration.

AB - We report on the first demonstration of passive all-optical plasma lensing using a two-stage setup. An intense femtosecond laser accelerates electrons in a laser wakefield accelerator (LWFA) to 100 MeV over millimeter length scales. By adding a second gas target behind the initial LWFA stage we introduce a robust and independently tunable plasma lens. We observe a density dependent reduction of the LWFA electron beam divergence from an initial value of 2.3 mrad, down to 1.4 mrad (rms), when the plasma lens is in operation. Such a plasma lens provides a simple and compact approach for divergence reduction well matched to the mm-scale length of the LWFA accelerator. The focusing forces are provided solely by the plasma and driven by the bunch itself only, making this a highly useful and conceptually new approach to electron beam focusing. Possible applications of this lens are not limited to laser plasma accelerators. Since no active driver is needed the passive plasma lens is also suited for high repetition rate focusing of electron bunches. Its understanding is also required for modeling the evolution of the driving particle bunch in particle driven wake field acceleration.

KW - laser wakefield accelerated electron bunch

KW - passive all-optical plasma lensing

KW - laser wakefield accelerator

KW - LWFA

KW - plasma

U2 - 10.1103/PhysRevAccelBeams.19.071301

DO - 10.1103/PhysRevAccelBeams.19.071301

M3 - Article

VL - 19

JO - Physical Review Special Topics: Accelerators and Beams

T2 - Physical Review Special Topics: Accelerators and Beams

JF - Physical Review Special Topics: Accelerators and Beams

SN - 1098-4402

IS - 7

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