TRANSFORMATION RATIO AT PLASMA WAKEFIELD EXCITATION BY LASER PULSE WITH RAMPING OF ITS INTENSITY ACCORDING TO COSINE

  • Vasyl I. Maslov National Science Center "Kharkiv Institute of Physics and Technology" NASU,1, Akademichna St., Kharkiv, 61108, Ukraine https://orcid.org/0000-0002-4370-7685
  • Olena M. Svystun National Science Center "Kharkiv Institute of Physics and Technology" NASU,1, Akademichna St., Kharkiv, 61108, Ukraine

Abstract

Plasma wakefield excitation by shaped laser pulse, the intensity of which slowly increases up to its maximum in longitudinal direction according to cosine and sharply cuts off at the tail of the pulse, is numerically simulated with the purpose to increase the transformation ratio. The transformation ratio determines the maximum energy, to which electrons can be accelerated, and it is estimated by the ratio of the amplitude of the wake wave after the pulse and the amplitude of the plasma perturbation within the pulse. The length of the shaped laser pulse is selected to be longer than the plasma wavelength. The radius of the pulse is selected to be much smaller than its length. It is shown that for the considered type of laser pulse shaping with these parameters the transformation ratio can be much larger than the limiting value of two, which follows from Wilson theorem developed for particle bunch, and which corresponds to any symmetric particle distribution in a bunch.

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Author Biography

Vasyl I. Maslov, National Science Center "Kharkiv Institute of Physics and Technology" NASU,1, Akademichna St., Kharkiv, 61108, Ukraine

References

Tajima T., Dawson J.M. Laser Electron Accelerator // Physical Review Letters. – 1979. – Vol. 43, Issue 4. – P. 267–270.

Esarey E., Sprangle P., Krall J., Ting A. Overview of Plasma-Based Accelerator Concepts // IEEE Transactions on Plasma Science. – 1996. – Vol. 24, Issue 2. – P. 252–288.

Hooker S. M. Developments in laser-driven plasma accelerators // Nature Photonics. – 2013. – Vol. 7, Issue 10. – P. 775–782.

Malka V. Laser plasma accelerators // Physics of Plasmas. – 2012. – Vol. 19, Issue 5. – P. 055501– 055700.

Corde S., Phuoc K.Ta, Lambert G. et al. Femtosecond x rays from laser-plasma accelerators // Reviews of Modern Physics. – 2013. – Vol. 85, Issue 1. – P. 1–58.

Kim H.T., Pae K.H., Cha H.J. et.al. Enhancement of electron energy to the multi-GeV regime by a dual-stage laser-wakefield accelerator pumped by petawatt laser pulses // Physical Review Letters. – 2013. – Vol. 111, Issue 16. – P. 165002.

Afhami1 S., Eslami1 E. Injection and acceleration of electron bunch in a plasma wakefield produced by a chirped laser pulse // Physics of Plasmas. – 2014. – Vol. 21, Issue 6. – P. 063108.

Mori W.B., Decker C.D., Hinkel D.E., Katsouleas T. Raman forward scattering of short-pulse high-intensity lasers // Physical Review Letters. – 1994. – Vol. 72, Issue 10. – P. 1482–1485.

Ruth R.D., Chao A.W., Morton P.L., Wilson P.B. A plasma wake field accelerator // Particle Accelerators. – 1985. – Vol. 17, Issue 3-4. – P. 171–179.

Chen P., Dawson J.M., Huff R.W., Katsouleas T. Acceleration of Electrons by the Interaction of a Bunched Electron Beam with a Plasma // Physical Review Letters. – 1985. – Vol. 54, Issue 7. – P.693–696.

Katsouleas T. Physical mechanisms in the plasma wake-field accelerator // Physical Review A. – 1986. – Vol. 33, Issue 3. – P. 2056–2064.

Liseykina T.V., Bychenkov V.Yu., Dudnikova G.I., Pegoraro F. Laser-triggered ion acceleration at moderate intensity and pulse duration // Applied Physics B. – 2005. – Vol. 81, Issue 4. – P. 537–542.

Bulanov S.V., Vshivkov V.A., Dudnikova G.I. et al. Laser acceleration of charged particles in inhomogeneous plasmas. I // Plasma Physics Reports. – 1997. – Vol. 23, Issue 4. – P. 259–269.

Dudnikova G.I., Bychenkov V.Yu., Maksimchuk A. et al. Electron acceleration by few-cycle laser pulses with singlewavelength spot size // Physical Review E. – 2003. – Vol. 67. – P. 026416 (1–7).

Published
2014-08-29
Cited
How to Cite
Maslov, V. I., & Svystun, O. M. (2014). TRANSFORMATION RATIO AT PLASMA WAKEFIELD EXCITATION BY LASER PULSE WITH RAMPING OF ITS INTENSITY ACCORDING TO COSINE. East European Journal of Physics, 1(3), 90-94. https://doi.org/10.26565/2312-4334-2014-3-10