Paper |
Title |
Page |
MPPE080 |
Transversal Deflection of Electrons Moving in Parallel with Linearly Polarized Laser Beam and its Application
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4054 |
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- D.A. Zakaryan, D.K. Kalantaryan
YSU, Yerevan
- E.D. Gazazyan, K.A. Ispirian, M.K. Ispirian
YerPhI, Yerevan
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The motion of electrons in linearly polarized laser beams in a finite length interaction region and after in a field free drift length is investigated. It is shown that in the interaction region the trajectory of the electrons is almost straight lines with very small oscillation weakly depending on the laser intensity. In the drift region the electrons acquire significant transversal deflection that allows to carry out the measurement of the length and longitudinal particle distribution of femtosecond bunches. The dependence of this deflection upon the electron energy, interaction region length, etc is studied. The principles of the construction of femtosecond oscilloscopes are discussed.
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RPAT047 |
Preliminary Design of a Femtosecond Oscilloscope
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2944 |
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- E.D. Gazazyan, K.A. Ispirian, A.T. Margaryan
YerPhI, Yerevan
- D.K. Kalantaryan
YSU, Yerevan
- E.M. Laziev
CANDLE, Yerevan
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The calculations on motion of electrons in a finite length electromagnetic field of linearly and circularly polarized laser beams have shown that one can use the transversal deflection of electrons on a screen at a certain distance after the interaction region for the measurement of the length and longitudinal particle distribution of femtosecond bunches. In this work the construction and preliminary parameters of various parts of a device that may be called femtosecond oscilloscope are considered. The influence of various factors, such as the energy spread and size of the electron bunches, are taken into account. For CO2 laser intensity 1016 W/cm2 and field free drift length 1m the deflection is 5.3 and 0.06 cm, while the few centimeters long interaction length between 2 mirrors requires assembling accuracy 6 mm and 1.3 micron for 20 MeV to 50 keV, respectively.
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