Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser

Mark Wiggins; D.A. Jaroszynski; B.W.J. McNeil; G.R.M. Robb; P. Aitken; A.D.R. Phelps; A.W. Cross; K. Ronald; N.S. Ginzburg; V.G.  Shpak; M.I.  Yalandin; S.A.  Shunailov; M.R.  Ulmaskulov

doi:10.1103/PhysRevLett.84.2393

Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser

Mark Wiggins, D.A. Jaroszynski, B.W.J. McNeil, G.R.M. Robb, P. Aitken, A.D.R. Phelps, A.W. Cross, K. Ronald, N.S. Ginzburg, V.G. Shpak, M.I. Yalandin, S.A. Shunailov, M.R. Ulmaskulov

Physics

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Abstract

Ultrashort pulses of microwave radiation have been produced in a dielectric-lined Cherenkov free-electron maser (FEM) amplifier. An intense initial seed pulse, due to coherent spontaneous emission (CSE), arises at the leading edge of the electron pulse. There is evidence to show that 3-4 cycle spikes are produced through the amplification of these seed pulses. A strong dependence of the start-up power on the rise time of the electron pulse has been found. The experimental results are verified by a theoretical analysis. Our study shows that amplification in a FEM amplifier is always initiated by CSE arising from the edge of the electron pulse when the rise time is comparable to the electromagnetic wave period.

Original language	English
Pages (from-to)	2393-2396
Number of pages	4
Journal	Physical Review Letters
Volume	84
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.84.2393
Publication status	Published - 13 Mar 2000

Keywords

self-amplification
coherent
spontaneous
emission
maser

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10.1103/PhysRevLett.84.2393

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Wiggins, M., Jaroszynski, D. A., McNeil, B. W. J., Robb, G. R. M., Aitken, P., Phelps, A. D. R., Cross, A. W., Ronald, K., Ginzburg, N. S., Shpak, V. G., Yalandin, M. I., Shunailov, S. A., & Ulmaskulov, M. R. (2000). Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser. Physical Review Letters, 84(11), 2393-2396. https://doi.org/10.1103/PhysRevLett.84.2393

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title = "Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser",

abstract = "Ultrashort pulses of microwave radiation have been produced in a dielectric-lined Cherenkov free-electron maser (FEM) amplifier. An intense initial seed pulse, due to coherent spontaneous emission (CSE), arises at the leading edge of the electron pulse. There is evidence to show that 3-4 cycle spikes are produced through the amplification of these seed pulses. A strong dependence of the start-up power on the rise time of the electron pulse has been found. The experimental results are verified by a theoretical analysis. Our study shows that amplification in a FEM amplifier is always initiated by CSE arising from the edge of the electron pulse when the rise time is comparable to the electromagnetic wave period.",

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T1 - Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser

AU - Wiggins, Mark

AU - Jaroszynski, D.A.

AU - McNeil, B.W.J.

AU - Robb, G.R.M.

AU - Aitken, P.

AU - Phelps, A.D.R.

AU - Cross, A.W.

AU - Ronald, K.

AU - Ginzburg, N.S.

AU - Shpak, V.G.

AU - Yalandin, M.I.

AU - Shunailov, S.A.

AU - Ulmaskulov, M.R.

PY - 2000/3/13

Y1 - 2000/3/13

N2 - Ultrashort pulses of microwave radiation have been produced in a dielectric-lined Cherenkov free-electron maser (FEM) amplifier. An intense initial seed pulse, due to coherent spontaneous emission (CSE), arises at the leading edge of the electron pulse. There is evidence to show that 3-4 cycle spikes are produced through the amplification of these seed pulses. A strong dependence of the start-up power on the rise time of the electron pulse has been found. The experimental results are verified by a theoretical analysis. Our study shows that amplification in a FEM amplifier is always initiated by CSE arising from the edge of the electron pulse when the rise time is comparable to the electromagnetic wave period.

AB - Ultrashort pulses of microwave radiation have been produced in a dielectric-lined Cherenkov free-electron maser (FEM) amplifier. An intense initial seed pulse, due to coherent spontaneous emission (CSE), arises at the leading edge of the electron pulse. There is evidence to show that 3-4 cycle spikes are produced through the amplification of these seed pulses. A strong dependence of the start-up power on the rise time of the electron pulse has been found. The experimental results are verified by a theoretical analysis. Our study shows that amplification in a FEM amplifier is always initiated by CSE arising from the edge of the electron pulse when the rise time is comparable to the electromagnetic wave period.

KW - self-amplification

KW - coherent

KW - spontaneous

KW - emission

KW - maser

UR - http://journals.aps.org/prl/

U2 - 10.1103/PhysRevLett.84.2393

DO - 10.1103/PhysRevLett.84.2393

M3 - Article

SN - 0031-9007

VL - 84

SP - 2393

EP - 2396

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

ER -

Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser

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Keywords

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