The effects of plasma density and laser energy on the stability of laser produced monoenergetic electron beams are investigated. Fluctuations in the principal beam parameters, namely, electron energy, energy-spread, charge, and pointing, are demonstrated to be minimized at low densities. This improvement in stability is attributed to the reduced time for pulse evolution required before self-injection occurs; i.e., that the pulse is closest to the matched conditions for these densities. It is also observed that electrons are only consistently produced above a density-dependent energy threshold. These observations are consistent with there being a threshold intensity required for the occurrence of self-injection after accounting for pulse compression.
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May 2007
Research Article|
March 21 2007
On the stability of laser wakefield electron accelerators in the monoenergetic regimea) Available to Purchase
S. P. D. Mangles;
S. P. D. Mangles
c)
Blackett Laboratory,
Imperial College
, London SW7 2BZ, United Kingdom
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A. G. R. Thomas;
A. G. R. Thomas
Blackett Laboratory,
Imperial College
, London SW7 2BZ, United Kingdom
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O. Lundh;
O. Lundh
Department of Physics,
Lund University
, PO Box 118, S-22100 Lund, Sweden
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F. Lindau;
F. Lindau
Department of Physics,
Lund University
, PO Box 118, S-22100 Lund, Sweden
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M. C. Kaluza;
M. C. Kaluza
d)
Blackett Laboratory,
Imperial College
, London SW7 2BZ, United Kingdom
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A. Persson;
A. Persson
Department of Physics,
Lund University
, PO Box 118, S-22100 Lund, Sweden
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C.-G. Wahlström;
C.-G. Wahlström
Department of Physics,
Lund University
, PO Box 118, S-22100 Lund, Sweden
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K. Krushelnick;
K. Krushelnick
e)
Blackett Laboratory,
Imperial College
, London SW7 2BZ, United Kingdom
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Z. Najmudin
Z. Najmudin
Blackett Laboratory,
Imperial College
, London SW7 2BZ, United Kingdom
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S. P. D. Mangles
c)
A. G. R. Thomas
O. Lundh
F. Lindau
M. C. Kaluza
d)
A. Persson
C.-G. Wahlström
K. Krushelnick
e)
Z. Najmudin
Blackett Laboratory,
Imperial College
, London SW7 2BZ, United Kingdomc)
Invited speaker.
d)
Current address: Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Max-Wien-Platz 1, 07743 Jena, Germany.
e)
Current address: Center for Ultrafast Optical Science and Department of Nuclear Engineering, 6103 ERB-1, 2200 Bonisteel Blvd., University of Michigan, Ann Arbor, Michigan.
a)
Paper UI2 4, Bull. Am. Phys. Soc. 51, 259 (2006).
Phys. Plasmas 14, 056702 (2007)
Article history
Received:
November 03 2006
Accepted:
December 12 2006
Citation
S. P. D. Mangles, A. G. R. Thomas, O. Lundh, F. Lindau, M. C. Kaluza, A. Persson, C.-G. Wahlström, K. Krushelnick, Z. Najmudin; On the stability of laser wakefield electron accelerators in the monoenergetic regime. Phys. Plasmas 1 May 2007; 14 (5): 056702. https://doi.org/10.1063/1.2436481
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